This is an automated email from the ASF dual-hosted git repository.

wusheng pushed a commit to branch master
in repository 
https://gitbox.apache.org/repos/asf/incubator-skywalking-oal-tool.git


The following commit(s) were added to refs/heads/master by this push:
     new fb94fcf  Remove target and fix ci.
fb94fcf is described below

commit fb94fcf52baa665ba0fcbf9468dae5bf8e207831
Author: Wu Sheng <wu.sh...@foxmail.com>
AuthorDate: Thu Aug 2 22:40:57 2018 +0800

    Remove target and fix ci.
---
 .../org/apache/skywalking/oal/tool/Main.class      | Bin 1952 -> 0 bytes
 .../oal/tool/parser/AnalysisResult.class           | Bin 607 -> 0 bytes
 .../skywalking/oal/tool/parser/OALListener.class   | Bin 2114 -> 0 bytes
 .../skywalking/oal/tool/parser/ScriptParser.class  | Bin 2574 -> 0 bytes
 oal-parser/target/test-classes/oal_test.oal        |  17 -
 .../oal/tool/parser/ScriptParserTest.class         | Bin 1606 -> 0 bytes
 .../skywalking/oal/tool/grammar/OALLexer.tokens    |  18 +
 oal-syntax/target/.plxarc                          |   1 -
 oal-syntax/target/classes/META-INF/DEPENDENCIES    |  33 --
 oal-syntax/target/classes/META-INF/LICENSE         | 202 --------
 oal-syntax/target/classes/META-INF/NOTICE          |   8 -
 oal-syntax/target/classes/OALLexer.tokens          |  42 --
 oal-syntax/target/classes/OALParser.tokens         |  42 --
 .../skywalking/oal/tool/grammar/OALLexer.class     | Bin 9682 -> 0 bytes
 .../skywalking/oal/tool/grammar/OALLexer.interp    | 101 ----
 .../OALParser$AggregateFunctionContext.class       | Bin 2182 -> 0 bytes
 .../OALParser$AggregationStatementContext.class    | Bin 2742 -> 0 bytes
 .../OALParser$FilterExpressionContext.class        | Bin 1282 -> 0 bytes
 .../grammar/OALParser$FunctionNameContext.class    | Bin 1448 -> 0 bytes
 .../grammar/OALParser$MetricStatementContext.class | Bin 2638 -> 0 bytes
 .../oal/tool/grammar/OALParser$RootContext.class   | Bin 1878 -> 0 bytes
 .../oal/tool/grammar/OALParser$SourceContext.class | Bin 2216 -> 0 bytes
 .../tool/grammar/OALParser$VariableContext.class   | Bin 1423 -> 0 bytes
 .../skywalking/oal/tool/grammar/OALParser.class    | Bin 12615 -> 0 bytes
 .../skywalking/oal/tool/grammar/OALParser.interp   |  71 ---
 .../oal/tool/grammar/OALParserBaseListener.class   | Bin 4535 -> 0 bytes
 .../oal/tool/grammar/OALParserListener.class       | Bin 2172 -> 0 bytes
 .../generated-sources/antlr4/OALLexer.tokens       |  42 --
 .../generated-sources/antlr4/OALParser.tokens      |  42 --
 .../skywalking/oal/tool/grammar/OALLexer.interp    | 101 ----
 .../skywalking/oal/tool/grammar/OALLexer.java      | 265 ----------
 .../skywalking/oal/tool/grammar/OALParser.interp   |  71 ---
 .../skywalking/oal/tool/grammar/OALParser.java     | 570 ---------------------
 .../oal/tool/grammar/OALParserBaseListener.java    | 135 -----
 .../oal/tool/grammar/OALParserListener.java        |  90 ----
 .../META-INF/DEPENDENCIES                          |  33 --
 .../META-INF/LICENSE                               | 202 --------
 .../maven-shared-archive-resources/META-INF/NOTICE |   8 -
 .../target/maven-status/antlr4/dependencies.ser    | Bin 532 -> 0 bytes
 .../compile/default-compile/createdFiles.lst       |  12 -
 .../compile/default-compile/inputFiles.lst         |   4 -
 target/.plxarc                                     |   1 -
 .../META-INF/DEPENDENCIES                          |  11 -
 .../META-INF/LICENSE                               | 202 --------
 .../maven-shared-archive-resources/META-INF/NOTICE |   8 -
 45 files changed, 18 insertions(+), 2314 deletions(-)

diff --git 
a/oal-parser/target/classes/org/apache/skywalking/oal/tool/Main.class 
b/oal-parser/target/classes/org/apache/skywalking/oal/tool/Main.class
deleted file mode 100644
index 5a3be3b..0000000
Binary files 
a/oal-parser/target/classes/org/apache/skywalking/oal/tool/Main.class and 
/dev/null differ
diff --git 
a/oal-parser/target/classes/org/apache/skywalking/oal/tool/parser/AnalysisResult.class
 
b/oal-parser/target/classes/org/apache/skywalking/oal/tool/parser/AnalysisResult.class
deleted file mode 100644
index 2c4d1d3..0000000
Binary files 
a/oal-parser/target/classes/org/apache/skywalking/oal/tool/parser/AnalysisResult.class
 and /dev/null differ
diff --git 
a/oal-parser/target/classes/org/apache/skywalking/oal/tool/parser/OALListener.class
 
b/oal-parser/target/classes/org/apache/skywalking/oal/tool/parser/OALListener.class
deleted file mode 100644
index 573b463..0000000
Binary files 
a/oal-parser/target/classes/org/apache/skywalking/oal/tool/parser/OALListener.class
 and /dev/null differ
diff --git 
a/oal-parser/target/classes/org/apache/skywalking/oal/tool/parser/ScriptParser.class
 
b/oal-parser/target/classes/org/apache/skywalking/oal/tool/parser/ScriptParser.class
deleted file mode 100644
index cb40261..0000000
Binary files 
a/oal-parser/target/classes/org/apache/skywalking/oal/tool/parser/ScriptParser.class
 and /dev/null differ
diff --git a/oal-parser/target/test-classes/oal_test.oal 
b/oal-parser/target/test-classes/oal_test.oal
deleted file mode 100644
index 525d14d..0000000
--- a/oal-parser/target/test-classes/oal_test.oal
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
\ No newline at end of file
diff --git 
a/oal-parser/target/test-classes/org/apache/skywalking/oal/tool/parser/ScriptParserTest.class
 
b/oal-parser/target/test-classes/org/apache/skywalking/oal/tool/parser/ScriptParserTest.class
deleted file mode 100644
index f5a0b37..0000000
Binary files 
a/oal-parser/target/test-classes/org/apache/skywalking/oal/tool/parser/ScriptParserTest.class
 and /dev/null differ
diff --git 
a/oal-syntax/src/main/antlr4/org/apache/skywalking/oal/tool/grammar/OALLexer.tokens
 
b/oal-syntax/src/main/antlr4/org/apache/skywalking/oal/tool/grammar/OALLexer.tokens
index 10c3842..302ec2c 100644
--- 
a/oal-syntax/src/main/antlr4/org/apache/skywalking/oal/tool/grammar/OALLexer.tokens
+++ 
b/oal-syntax/src/main/antlr4/org/apache/skywalking/oal/tool/grammar/OALLexer.tokens
@@ -1,3 +1,21 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
 FROM=1
 FILTER=2
 SRC_ALL=3
diff --git a/oal-syntax/target/.plxarc b/oal-syntax/target/.plxarc
deleted file mode 100644
index 67ea6ee..0000000
--- a/oal-syntax/target/.plxarc
+++ /dev/null
@@ -1 +0,0 @@
-maven-shared-archive-resources
\ No newline at end of file
diff --git a/oal-syntax/target/classes/META-INF/DEPENDENCIES 
b/oal-syntax/target/classes/META-INF/DEPENDENCIES
deleted file mode 100644
index 2764812..0000000
--- a/oal-syntax/target/classes/META-INF/DEPENDENCIES
+++ /dev/null
@@ -1,33 +0,0 @@
-// ------------------------------------------------------------------
-// Transitive dependencies of this project determined from the
-// maven pom organized by organization.
-// ------------------------------------------------------------------
-
-oal-syntax
-
-
-From: 'abego Software GmbH, Germany' (http://abego-software.de)
-  - abego TreeLayout Core (http://treelayout.sourceforge.net) 
org.abego.treelayout:org.abego.treelayout.core:bundle:1.0.3
-    License: BSD 3-Clause "New" or "Revised" License (BSD-3-Clause)  
(http://www.abego-software.de/legal/apl-v10.html)
-
-From: 'an unknown organization'
-  - ICU4J (http://icu-project.org/) com.ibm.icu:icu4j:jar:58.2
-    License: Unicode/ICU License  
(http://source.icu-project.org/repos/icu/trunk/icu4j/main/shared/licenses/LICENSE)
-  - StringTemplate 4 (http://www.stringtemplate.org) org.antlr:ST4:jar:4.0.8
-    License: BSD licence  (http://antlr.org/license.html)
-
-From: 'ANTLR' (http://www.antlr.org)
-  - ANTLR 3 Runtime (http://www.antlr.org) org.antlr:antlr-runtime:jar:3.5.2
-    License: BSD licence  (http://antlr.org/license.html)
-  - ANTLR 4 Tool (http://www.antlr.org) org.antlr:antlr4:jar:4.7.1
-    License: The BSD License  (http://www.antlr.org/license.html)
-  - ANTLR 4 Runtime (http://www.antlr.org/antlr4-runtime) 
org.antlr:antlr4-runtime:jar:4.7.1
-    License: The BSD License  (http://www.antlr.org/license.html)
-
-From: 'Oracle' (http://www.oracle.com)
-  - JSR 353 (JSON Processing) Default Provider (http://jsonp.java.net) 
org.glassfish:javax.json:bundle:1.0.4
-    License: Dual license consisting of the CDDL v1.1 and GPL v2  
(https://glassfish.java.net/public/CDDL+GPL_1_1.html)
-
-
-
-
diff --git a/oal-syntax/target/classes/META-INF/LICENSE 
b/oal-syntax/target/classes/META-INF/LICENSE
deleted file mode 100644
index d645695..0000000
--- a/oal-syntax/target/classes/META-INF/LICENSE
+++ /dev/null
@@ -1,202 +0,0 @@
-
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
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-      the conditions stated in this License.
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-   5. Submission of Contributions. Unless You explicitly state otherwise,
-      any Contribution intentionally submitted for inclusion in the Work
-      by You to the Licensor shall be under the terms and conditions of
-      this License, without any additional terms or conditions.
-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
-      with Licensor regarding such Contributions.
-
-   6. Trademarks. This License does not grant permission to use the trade
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-      except as required for reasonable and customary use in describing the
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diff --git a/oal-syntax/target/classes/META-INF/NOTICE 
b/oal-syntax/target/classes/META-INF/NOTICE
deleted file mode 100644
index 82d5ff9..0000000
--- a/oal-syntax/target/classes/META-INF/NOTICE
+++ /dev/null
@@ -1,8 +0,0 @@
-
-oal-syntax
-Copyright 2018 The Apache Software Foundation
-
-This product includes software developed at
-The Apache Software Foundation (http://www.apache.org/).
-
-
diff --git a/oal-syntax/target/classes/OALLexer.tokens 
b/oal-syntax/target/classes/OALLexer.tokens
deleted file mode 100644
index 10c3842..0000000
--- a/oal-syntax/target/classes/OALLexer.tokens
+++ /dev/null
@@ -1,42 +0,0 @@
-FROM=1
-FILTER=2
-SRC_ALL=3
-SRC_SERVICE=4
-SRC_SERVICE_INSTANCE=5
-SRC_ENDPOINT=6
-SRC_SERVICE_RELATION=7
-SRC_SERVICE_INSTANCE_RELATION=8
-SRC_ENDPOINT_RELATION=9
-SRC_SERVICE_INSTANCE_JVM_CPU=10
-SRC_SERVICE_INSTANCE_JVM_MEMORY=11
-SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL=12
-DECIMAL_LITERAL=13
-BOOL_LITERAL=14
-CHAR_LITERAL=15
-STRING_LITERAL=16
-DelimitedComment=17
-LineComment=18
-SPACE=19
-IDENTIFIER=20
-DOT=21
-LR_BRACKET=22
-RR_BRACKET=23
-COMMA=24
-SEMI=25
-EQUAL=26
-'from'=1
-'filter'=2
-'All'=3
-'Service'=4
-'ServiceInstance'=5
-'Endpoint'=6
-'ServiceRelation'=7
-'ServiceInstanceRelation'=8
-'EndpointRelation'=9
-'ServiceInstance_JVM_Memory_Pool'=12
-'.'=21
-'('=22
-')'=23
-','=24
-';'=25
-'='=26
diff --git a/oal-syntax/target/classes/OALParser.tokens 
b/oal-syntax/target/classes/OALParser.tokens
deleted file mode 100644
index 10c3842..0000000
--- a/oal-syntax/target/classes/OALParser.tokens
+++ /dev/null
@@ -1,42 +0,0 @@
-FROM=1
-FILTER=2
-SRC_ALL=3
-SRC_SERVICE=4
-SRC_SERVICE_INSTANCE=5
-SRC_ENDPOINT=6
-SRC_SERVICE_RELATION=7
-SRC_SERVICE_INSTANCE_RELATION=8
-SRC_ENDPOINT_RELATION=9
-SRC_SERVICE_INSTANCE_JVM_CPU=10
-SRC_SERVICE_INSTANCE_JVM_MEMORY=11
-SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL=12
-DECIMAL_LITERAL=13
-BOOL_LITERAL=14
-CHAR_LITERAL=15
-STRING_LITERAL=16
-DelimitedComment=17
-LineComment=18
-SPACE=19
-IDENTIFIER=20
-DOT=21
-LR_BRACKET=22
-RR_BRACKET=23
-COMMA=24
-SEMI=25
-EQUAL=26
-'from'=1
-'filter'=2
-'All'=3
-'Service'=4
-'ServiceInstance'=5
-'Endpoint'=6
-'ServiceRelation'=7
-'ServiceInstanceRelation'=8
-'EndpointRelation'=9
-'ServiceInstance_JVM_Memory_Pool'=12
-'.'=21
-'('=22
-')'=23
-','=24
-';'=25
-'='=26
diff --git 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALLexer.class
 
b/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALLexer.class
deleted file mode 100644
index 111519e..0000000
Binary files 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALLexer.class
 and /dev/null differ
diff --git 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALLexer.interp
 
b/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALLexer.interp
deleted file mode 100644
index 6444ad4..0000000
--- 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALLexer.interp
+++ /dev/null
@@ -1,101 +0,0 @@
-token literal names:
-null
-'from'
-'filter'
-'All'
-'Service'
-'ServiceInstance'
-'Endpoint'
-'ServiceRelation'
-'ServiceInstanceRelation'
-'EndpointRelation'
-null
-null
-'ServiceInstance_JVM_Memory_Pool'
-null
-null
-null
-null
-null
-null
-null
-null
-'.'
-'('
-')'
-','
-';'
-'='
-
-token symbolic names:
-null
-FROM
-FILTER
-SRC_ALL
-SRC_SERVICE
-SRC_SERVICE_INSTANCE
-SRC_ENDPOINT
-SRC_SERVICE_RELATION
-SRC_SERVICE_INSTANCE_RELATION
-SRC_ENDPOINT_RELATION
-SRC_SERVICE_INSTANCE_JVM_CPU
-SRC_SERVICE_INSTANCE_JVM_MEMORY
-SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL
-DECIMAL_LITERAL
-BOOL_LITERAL
-CHAR_LITERAL
-STRING_LITERAL
-DelimitedComment
-LineComment
-SPACE
-IDENTIFIER
-DOT
-LR_BRACKET
-RR_BRACKET
-COMMA
-SEMI
-EQUAL
-
-rule names:
-FROM
-FILTER
-SRC_ALL
-SRC_SERVICE
-SRC_SERVICE_INSTANCE
-SRC_ENDPOINT
-SRC_SERVICE_RELATION
-SRC_SERVICE_INSTANCE_RELATION
-SRC_ENDPOINT_RELATION
-SRC_SERVICE_INSTANCE_JVM_CPU
-SRC_SERVICE_INSTANCE_JVM_MEMORY
-SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL
-DECIMAL_LITERAL
-BOOL_LITERAL
-CHAR_LITERAL
-STRING_LITERAL
-DelimitedComment
-LineComment
-SPACE
-IDENTIFIER
-EscapeSequence
-HexDigits
-HexDigit
-Digits
-LetterOrDigit
-Letter
-DOT
-LR_BRACKET
-RR_BRACKET
-COMMA
-SEMI
-EQUAL
-
-channel names:
-DEFAULT_TOKEN_CHANNEL
-HIDDEN
-
-mode names:
-DEFAULT_MODE
-
-atn:
-[3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 2, 28, 407, 8, 1, 
4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9, 7, 4, 8, 
9, 8, 4, 9, 9, 9, 4, 10, 9, 10, 4, 11, 9, 11, 4, 12, 9, 12, 4, 13, 9, 13, 4, 
14, 9, 14, 4, 15, 9, 15, 4, 16, 9, 16, 4, 17, 9, 17, 4, 18, 9, 18, 4, 19, 9, 
19, 4, 20, 9, 20, 4, 21, 9, 21, 4, 22, 9, 22, 4, 23, 9, 23, 4, 24, 9, 24, 4, 
25, 9, 25, 4, 26, 9, 26, 4, 27, 9, 27, 4, 28, 9, 28, 4, 29, 9, 29, 4, 30, 9, 
30, 4, 31, 9, 31, 4, 32, 9,  [...]
\ No newline at end of file
diff --git 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$AggregateFunctionContext.class
 
b/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$AggregateFunctionContext.class
deleted file mode 100644
index d8b7c8e..0000000
Binary files 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$AggregateFunctionContext.class
 and /dev/null differ
diff --git 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$AggregationStatementContext.class
 
b/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$AggregationStatementContext.class
deleted file mode 100644
index 5c27a6a..0000000
Binary files 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$AggregationStatementContext.class
 and /dev/null differ
diff --git 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$FilterExpressionContext.class
 
b/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$FilterExpressionContext.class
deleted file mode 100644
index 18a7b73..0000000
Binary files 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$FilterExpressionContext.class
 and /dev/null differ
diff --git 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$FunctionNameContext.class
 
b/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$FunctionNameContext.class
deleted file mode 100644
index 129e981..0000000
Binary files 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$FunctionNameContext.class
 and /dev/null differ
diff --git 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$MetricStatementContext.class
 
b/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$MetricStatementContext.class
deleted file mode 100644
index 7484203..0000000
Binary files 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$MetricStatementContext.class
 and /dev/null differ
diff --git 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$RootContext.class
 
b/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$RootContext.class
deleted file mode 100644
index 16d70ad..0000000
Binary files 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$RootContext.class
 and /dev/null differ
diff --git 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$SourceContext.class
 
b/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$SourceContext.class
deleted file mode 100644
index 071cba9..0000000
Binary files 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$SourceContext.class
 and /dev/null differ
diff --git 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$VariableContext.class
 
b/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$VariableContext.class
deleted file mode 100644
index fda239a..0000000
Binary files 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser$VariableContext.class
 and /dev/null differ
diff --git 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser.class
 
b/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser.class
deleted file mode 100644
index c92d0e9..0000000
Binary files 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser.class
 and /dev/null differ
diff --git 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser.interp
 
b/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser.interp
deleted file mode 100644
index cf82033..0000000
--- 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParser.interp
+++ /dev/null
@@ -1,71 +0,0 @@
-token literal names:
-null
-'from'
-'filter'
-'All'
-'Service'
-'ServiceInstance'
-'Endpoint'
-'ServiceRelation'
-'ServiceInstanceRelation'
-'EndpointRelation'
-null
-null
-'ServiceInstance_JVM_Memory_Pool'
-null
-null
-null
-null
-null
-null
-null
-null
-'.'
-'('
-')'
-','
-';'
-'='
-
-token symbolic names:
-null
-FROM
-FILTER
-SRC_ALL
-SRC_SERVICE
-SRC_SERVICE_INSTANCE
-SRC_ENDPOINT
-SRC_SERVICE_RELATION
-SRC_SERVICE_INSTANCE_RELATION
-SRC_ENDPOINT_RELATION
-SRC_SERVICE_INSTANCE_JVM_CPU
-SRC_SERVICE_INSTANCE_JVM_MEMORY
-SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL
-DECIMAL_LITERAL
-BOOL_LITERAL
-CHAR_LITERAL
-STRING_LITERAL
-DelimitedComment
-LineComment
-SPACE
-IDENTIFIER
-DOT
-LR_BRACKET
-RR_BRACKET
-COMMA
-SEMI
-EQUAL
-
-rule names:
-root
-aggregationStatement
-metricStatement
-source
-variable
-aggregateFunction
-functionName
-filterExpression
-
-
-atn:
-[3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 3, 28, 66, 4, 2, 
9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9, 7, 4, 8, 9, 8, 
4, 9, 9, 9, 3, 2, 7, 2, 20, 10, 2, 12, 2, 14, 2, 23, 11, 2, 3, 3, 3, 3, 5, 3, 
27, 10, 3, 3, 3, 3, 3, 5, 3, 31, 10, 3, 3, 3, 3, 3, 5, 3, 35, 10, 3, 3, 3, 5, 
3, 38, 10, 3, 3, 3, 3, 3, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 
3, 5, 3, 5, 3, 6, 3, 6, 3, 7, 3, 7, 3, 7, 5, 7, 58, 10, 7, 3, 7, 3, 7, 3, 8, 3, 
8, 3, 9, 3, 9, 3, 9,  [...]
\ No newline at end of file
diff --git 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParserBaseListener.class
 
b/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParserBaseListener.class
deleted file mode 100644
index fefd9f5..0000000
Binary files 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParserBaseListener.class
 and /dev/null differ
diff --git 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParserListener.class
 
b/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParserListener.class
deleted file mode 100644
index a36d79d..0000000
Binary files 
a/oal-syntax/target/classes/org/apache/skywalking/oal/tool/grammar/OALParserListener.class
 and /dev/null differ
diff --git a/oal-syntax/target/generated-sources/antlr4/OALLexer.tokens 
b/oal-syntax/target/generated-sources/antlr4/OALLexer.tokens
deleted file mode 100644
index 10c3842..0000000
--- a/oal-syntax/target/generated-sources/antlr4/OALLexer.tokens
+++ /dev/null
@@ -1,42 +0,0 @@
-FROM=1
-FILTER=2
-SRC_ALL=3
-SRC_SERVICE=4
-SRC_SERVICE_INSTANCE=5
-SRC_ENDPOINT=6
-SRC_SERVICE_RELATION=7
-SRC_SERVICE_INSTANCE_RELATION=8
-SRC_ENDPOINT_RELATION=9
-SRC_SERVICE_INSTANCE_JVM_CPU=10
-SRC_SERVICE_INSTANCE_JVM_MEMORY=11
-SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL=12
-DECIMAL_LITERAL=13
-BOOL_LITERAL=14
-CHAR_LITERAL=15
-STRING_LITERAL=16
-DelimitedComment=17
-LineComment=18
-SPACE=19
-IDENTIFIER=20
-DOT=21
-LR_BRACKET=22
-RR_BRACKET=23
-COMMA=24
-SEMI=25
-EQUAL=26
-'from'=1
-'filter'=2
-'All'=3
-'Service'=4
-'ServiceInstance'=5
-'Endpoint'=6
-'ServiceRelation'=7
-'ServiceInstanceRelation'=8
-'EndpointRelation'=9
-'ServiceInstance_JVM_Memory_Pool'=12
-'.'=21
-'('=22
-')'=23
-','=24
-';'=25
-'='=26
diff --git a/oal-syntax/target/generated-sources/antlr4/OALParser.tokens 
b/oal-syntax/target/generated-sources/antlr4/OALParser.tokens
deleted file mode 100644
index 10c3842..0000000
--- a/oal-syntax/target/generated-sources/antlr4/OALParser.tokens
+++ /dev/null
@@ -1,42 +0,0 @@
-FROM=1
-FILTER=2
-SRC_ALL=3
-SRC_SERVICE=4
-SRC_SERVICE_INSTANCE=5
-SRC_ENDPOINT=6
-SRC_SERVICE_RELATION=7
-SRC_SERVICE_INSTANCE_RELATION=8
-SRC_ENDPOINT_RELATION=9
-SRC_SERVICE_INSTANCE_JVM_CPU=10
-SRC_SERVICE_INSTANCE_JVM_MEMORY=11
-SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL=12
-DECIMAL_LITERAL=13
-BOOL_LITERAL=14
-CHAR_LITERAL=15
-STRING_LITERAL=16
-DelimitedComment=17
-LineComment=18
-SPACE=19
-IDENTIFIER=20
-DOT=21
-LR_BRACKET=22
-RR_BRACKET=23
-COMMA=24
-SEMI=25
-EQUAL=26
-'from'=1
-'filter'=2
-'All'=3
-'Service'=4
-'ServiceInstance'=5
-'Endpoint'=6
-'ServiceRelation'=7
-'ServiceInstanceRelation'=8
-'EndpointRelation'=9
-'ServiceInstance_JVM_Memory_Pool'=12
-'.'=21
-'('=22
-')'=23
-','=24
-';'=25
-'='=26
diff --git 
a/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALLexer.interp
 
b/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALLexer.interp
deleted file mode 100644
index 6444ad4..0000000
--- 
a/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALLexer.interp
+++ /dev/null
@@ -1,101 +0,0 @@
-token literal names:
-null
-'from'
-'filter'
-'All'
-'Service'
-'ServiceInstance'
-'Endpoint'
-'ServiceRelation'
-'ServiceInstanceRelation'
-'EndpointRelation'
-null
-null
-'ServiceInstance_JVM_Memory_Pool'
-null
-null
-null
-null
-null
-null
-null
-null
-'.'
-'('
-')'
-','
-';'
-'='
-
-token symbolic names:
-null
-FROM
-FILTER
-SRC_ALL
-SRC_SERVICE
-SRC_SERVICE_INSTANCE
-SRC_ENDPOINT
-SRC_SERVICE_RELATION
-SRC_SERVICE_INSTANCE_RELATION
-SRC_ENDPOINT_RELATION
-SRC_SERVICE_INSTANCE_JVM_CPU
-SRC_SERVICE_INSTANCE_JVM_MEMORY
-SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL
-DECIMAL_LITERAL
-BOOL_LITERAL
-CHAR_LITERAL
-STRING_LITERAL
-DelimitedComment
-LineComment
-SPACE
-IDENTIFIER
-DOT
-LR_BRACKET
-RR_BRACKET
-COMMA
-SEMI
-EQUAL
-
-rule names:
-FROM
-FILTER
-SRC_ALL
-SRC_SERVICE
-SRC_SERVICE_INSTANCE
-SRC_ENDPOINT
-SRC_SERVICE_RELATION
-SRC_SERVICE_INSTANCE_RELATION
-SRC_ENDPOINT_RELATION
-SRC_SERVICE_INSTANCE_JVM_CPU
-SRC_SERVICE_INSTANCE_JVM_MEMORY
-SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL
-DECIMAL_LITERAL
-BOOL_LITERAL
-CHAR_LITERAL
-STRING_LITERAL
-DelimitedComment
-LineComment
-SPACE
-IDENTIFIER
-EscapeSequence
-HexDigits
-HexDigit
-Digits
-LetterOrDigit
-Letter
-DOT
-LR_BRACKET
-RR_BRACKET
-COMMA
-SEMI
-EQUAL
-
-channel names:
-DEFAULT_TOKEN_CHANNEL
-HIDDEN
-
-mode names:
-DEFAULT_MODE
-
-atn:
-[3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 2, 28, 407, 8, 1, 
4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9, 7, 4, 8, 
9, 8, 4, 9, 9, 9, 4, 10, 9, 10, 4, 11, 9, 11, 4, 12, 9, 12, 4, 13, 9, 13, 4, 
14, 9, 14, 4, 15, 9, 15, 4, 16, 9, 16, 4, 17, 9, 17, 4, 18, 9, 18, 4, 19, 9, 
19, 4, 20, 9, 20, 4, 21, 9, 21, 4, 22, 9, 22, 4, 23, 9, 23, 4, 24, 9, 24, 4, 
25, 9, 25, 4, 26, 9, 26, 4, 27, 9, 27, 4, 28, 9, 28, 4, 29, 9, 29, 4, 30, 9, 
30, 4, 31, 9, 31, 4, 32, 9,  [...]
\ No newline at end of file
diff --git 
a/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALLexer.java
 
b/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALLexer.java
deleted file mode 100644
index 857795f..0000000
--- 
a/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALLexer.java
+++ /dev/null
@@ -1,265 +0,0 @@
-// Generated from org/apache/skywalking/oal/tool/grammar/OALLexer.g4 by ANTLR 
4.7.1
-package org.apache.skywalking.oal.tool.grammar;
-import org.antlr.v4.runtime.Lexer;
-import org.antlr.v4.runtime.CharStream;
-import org.antlr.v4.runtime.Token;
-import org.antlr.v4.runtime.TokenStream;
-import org.antlr.v4.runtime.*;
-import org.antlr.v4.runtime.atn.*;
-import org.antlr.v4.runtime.dfa.DFA;
-import org.antlr.v4.runtime.misc.*;
-
-@SuppressWarnings({"all", "warnings", "unchecked", "unused", "cast"})
-public class OALLexer extends Lexer {
-       static { RuntimeMetaData.checkVersion("4.7.1", 
RuntimeMetaData.VERSION); }
-
-       protected static final DFA[] _decisionToDFA;
-       protected static final PredictionContextCache _sharedContextCache =
-               new PredictionContextCache();
-       public static final int
-               FROM=1, FILTER=2, SRC_ALL=3, SRC_SERVICE=4, 
SRC_SERVICE_INSTANCE=5, SRC_ENDPOINT=6, 
-               SRC_SERVICE_RELATION=7, SRC_SERVICE_INSTANCE_RELATION=8, 
SRC_ENDPOINT_RELATION=9, 
-               SRC_SERVICE_INSTANCE_JVM_CPU=10, 
SRC_SERVICE_INSTANCE_JVM_MEMORY=11, SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL=12, 
-               DECIMAL_LITERAL=13, BOOL_LITERAL=14, CHAR_LITERAL=15, 
STRING_LITERAL=16, 
-               DelimitedComment=17, LineComment=18, SPACE=19, IDENTIFIER=20, 
DOT=21, 
-               LR_BRACKET=22, RR_BRACKET=23, COMMA=24, SEMI=25, EQUAL=26;
-       public static String[] channelNames = {
-               "DEFAULT_TOKEN_CHANNEL", "HIDDEN"
-       };
-
-       public static String[] modeNames = {
-               "DEFAULT_MODE"
-       };
-
-       public static final String[] ruleNames = {
-               "FROM", "FILTER", "SRC_ALL", "SRC_SERVICE", 
"SRC_SERVICE_INSTANCE", "SRC_ENDPOINT", 
-               "SRC_SERVICE_RELATION", "SRC_SERVICE_INSTANCE_RELATION", 
"SRC_ENDPOINT_RELATION", 
-               "SRC_SERVICE_INSTANCE_JVM_CPU", 
"SRC_SERVICE_INSTANCE_JVM_MEMORY", "SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL", 
-               "DECIMAL_LITERAL", "BOOL_LITERAL", "CHAR_LITERAL", 
"STRING_LITERAL", "DelimitedComment", 
-               "LineComment", "SPACE", "IDENTIFIER", "EscapeSequence", 
"HexDigits", "HexDigit", 
-               "Digits", "LetterOrDigit", "Letter", "DOT", "LR_BRACKET", 
"RR_BRACKET", 
-               "COMMA", "SEMI", "EQUAL"
-       };
-
-       private static final String[] _LITERAL_NAMES = {
-               null, "'from'", "'filter'", "'All'", "'Service'", 
"'ServiceInstance'", 
-               "'Endpoint'", "'ServiceRelation'", "'ServiceInstanceRelation'", 
"'EndpointRelation'", 
-               null, null, "'ServiceInstance_JVM_Memory_Pool'", null, null, 
null, null, 
-               null, null, null, null, "'.'", "'('", "')'", "','", "';'", "'='"
-       };
-       private static final String[] _SYMBOLIC_NAMES = {
-               null, "FROM", "FILTER", "SRC_ALL", "SRC_SERVICE", 
"SRC_SERVICE_INSTANCE", 
-               "SRC_ENDPOINT", "SRC_SERVICE_RELATION", 
"SRC_SERVICE_INSTANCE_RELATION", 
-               "SRC_ENDPOINT_RELATION", "SRC_SERVICE_INSTANCE_JVM_CPU", 
"SRC_SERVICE_INSTANCE_JVM_MEMORY", 
-               "SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL", "DECIMAL_LITERAL", 
"BOOL_LITERAL", 
-               "CHAR_LITERAL", "STRING_LITERAL", "DelimitedComment", 
"LineComment", "SPACE", 
-               "IDENTIFIER", "DOT", "LR_BRACKET", "RR_BRACKET", "COMMA", 
"SEMI", "EQUAL"
-       };
-       public static final Vocabulary VOCABULARY = new 
VocabularyImpl(_LITERAL_NAMES, _SYMBOLIC_NAMES);
-
-       /**
-        * @deprecated Use {@link #VOCABULARY} instead.
-        */
-       @Deprecated
-       public static final String[] tokenNames;
-       static {
-               tokenNames = new String[_SYMBOLIC_NAMES.length];
-               for (int i = 0; i < tokenNames.length; i++) {
-                       tokenNames[i] = VOCABULARY.getLiteralName(i);
-                       if (tokenNames[i] == null) {
-                               tokenNames[i] = VOCABULARY.getSymbolicName(i);
-                       }
-
-                       if (tokenNames[i] == null) {
-                               tokenNames[i] = "<INVALID>";
-                       }
-               }
-       }
-
-       @Override
-       @Deprecated
-       public String[] getTokenNames() {
-               return tokenNames;
-       }
-
-       @Override
-
-       public Vocabulary getVocabulary() {
-               return VOCABULARY;
-       }
-
-
-       public OALLexer(CharStream input) {
-               super(input);
-               _interp = new 
LexerATNSimulator(this,_ATN,_decisionToDFA,_sharedContextCache);
-       }
-
-       @Override
-       public String getGrammarFileName() { return "OALLexer.g4"; }
-
-       @Override
-       public String[] getRuleNames() { return ruleNames; }
-
-       @Override
-       public String getSerializedATN() { return _serializedATN; }
-
-       @Override
-       public String[] getChannelNames() { return channelNames; }
-
-       @Override
-       public String[] getModeNames() { return modeNames; }
-
-       @Override
-       public ATN getATN() { return _ATN; }
-
-       public static final String _serializedATN =
-               
"\3\u608b\ua72a\u8133\ub9ed\u417c\u3be7\u7786\u5964\2\34\u0197\b\1\4\2"+
-               
"\t\2\4\3\t\3\4\4\t\4\4\5\t\5\4\6\t\6\4\7\t\7\4\b\t\b\4\t\t\t\4\n\t\n\4"+
-               
"\13\t\13\4\f\t\f\4\r\t\r\4\16\t\16\4\17\t\17\4\20\t\20\4\21\t\21\4\22"+
-               
"\t\22\4\23\t\23\4\24\t\24\4\25\t\25\4\26\t\26\4\27\t\27\4\30\t\30\4\31"+
-               
"\t\31\4\32\t\32\4\33\t\33\4\34\t\34\4\35\t\35\4\36\t\36\4\37\t\37\4 \t"+
-               " 
\4!\t!\3\2\3\2\3\2\3\2\3\2\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\4\3\4\3\4\3"+
-               
"\4\3\5\3\5\3\5\3\5\3\5\3\5\3\5\3\5\3\6\3\6\3\6\3\6\3\6\3\6\3\6\3\6\3\6"+
-               
"\3\6\3\6\3\6\3\6\3\6\3\6\3\6\3\7\3\7\3\7\3\7\3\7\3\7\3\7\3\7\3\7\3\b\3"+
-               
"\b\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\t\3\t\3\t"+
-               
"\3\t\3\t\3\t\3\t\3\t\3\t\3\t\3\t\3\t\3\t\3\t\3\t\3\t\3\t\3\t\3\t\3\t\3"+
-               
"\t\3\t\3\t\3\t\3\n\3\n\3\n\3\n\3\n\3\n\3\n\3\n\3\n\3\n\3\n\3\n\3\n\3\n"+
-               
"\3\n\3\n\3\n\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3"+
-               
"\13\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3\13\3\f\3"+
-               
"\f\3\f\3\f\3\f\3\f\3\f\3\f\3\f\3\f\3\f\3\f\3\f\3\f\3\f\3\f\3\f\3\f\3\f"+
-               
"\3\f\3\f\3\f\3\f\3\f\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3"+
-               
"\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r"+
-               
"\3\r\3\r\3\16\3\16\3\16\5\16\u0101\n\16\3\16\6\16\u0104\n\16\r\16\16\16"+
-               
"\u0105\3\16\5\16\u0109\n\16\5\16\u010b\n\16\3\16\5\16\u010e\n\16\3\17"+
-               
"\3\17\3\17\3\17\3\17\3\17\3\17\3\17\3\17\5\17\u0119\n\17\3\20\3\20\3\20"+
-               
"\5\20\u011e\n\20\3\20\3\20\3\21\3\21\3\21\7\21\u0125\n\21\f\21\16\21\u0128"+
-               
"\13\21\3\21\3\21\3\22\3\22\3\22\3\22\3\22\7\22\u0131\n\22\f\22\16\22\u0134"+
-               
"\13\22\3\22\3\22\3\22\3\22\3\22\3\23\3\23\3\23\3\23\7\23\u013f\n\23\f"+
-               
"\23\16\23\u0142\13\23\3\23\3\23\3\24\6\24\u0147\n\24\r\24\16\24\u0148"+
-               
"\3\24\3\24\3\25\3\25\7\25\u014f\n\25\f\25\16\25\u0152\13\25\3\26\3\26"+
-               
"\3\26\3\26\5\26\u0158\n\26\3\26\5\26\u015b\n\26\3\26\3\26\3\26\6\26\u0160"+
-               
"\n\26\r\26\16\26\u0161\3\26\3\26\3\26\3\26\3\26\5\26\u0169\n\26\3\27\3"+
-               
"\27\3\27\7\27\u016e\n\27\f\27\16\27\u0171\13\27\3\27\5\27\u0174\n\27\3"+
-               
"\30\3\30\3\31\3\31\7\31\u017a\n\31\f\31\16\31\u017d\13\31\3\31\5\31\u0180"+
-               
"\n\31\3\32\3\32\5\32\u0184\n\32\3\33\3\33\3\33\3\33\5\33\u018a\n\33\3"+
-               "\34\3\34\3\35\3\35\3\36\3\36\3\37\3\37\3 \3 
\3!\3!\3\u0132\2\"\3\3\5\4"+
-               
"\7\5\t\6\13\7\r\b\17\t\21\n\23\13\25\f\27\r\31\16\33\17\35\20\37\21!\22"+
-               
"#\23%\24\'\25)\26+\2-\2/\2\61\2\63\2\65\2\67\279\30;\31=\32?\33A\34\3"+
-               
"\2\22\3\2\63;\4\2NNnn\6\2\f\f\17\17))^^\6\2\f\f\17\17$$^^\4\2\f\f\17\17"+
-               
"\5\2\13\f\17\17\"\"\n\2$$))^^ddhhppttvv\3\2\62\65\3\2\629\5\2\62;CHch"+
-               
"\3\2\62;\4\2\62;aa\6\2&&C\\aac|\4\2\2\u0081\ud802\udc01\3\2\ud802\udc01"+
-               
"\3\2\udc02\ue001\2\u01ab\2\3\3\2\2\2\2\5\3\2\2\2\2\7\3\2\2\2\2\t\3\2\2"+
-               
"\2\2\13\3\2\2\2\2\r\3\2\2\2\2\17\3\2\2\2\2\21\3\2\2\2\2\23\3\2\2\2\2\25"+
-               
"\3\2\2\2\2\27\3\2\2\2\2\31\3\2\2\2\2\33\3\2\2\2\2\35\3\2\2\2\2\37\3\2"+
-               
"\2\2\2!\3\2\2\2\2#\3\2\2\2\2%\3\2\2\2\2\'\3\2\2\2\2)\3\2\2\2\2\67\3\2"+
-               
"\2\2\29\3\2\2\2\2;\3\2\2\2\2=\3\2\2\2\2?\3\2\2\2\2A\3\2\2\2\3C\3\2\2\2"+
-               
"\5H\3\2\2\2\7O\3\2\2\2\tS\3\2\2\2\13[\3\2\2\2\rk\3\2\2\2\17t\3\2\2\2\21"+
-               
"\u0084\3\2\2\2\23\u009c\3\2\2\2\25\u00ad\3\2\2\2\27\u00c5\3\2\2\2\31\u00dd"+
-               
"\3\2\2\2\33\u010a\3\2\2\2\35\u0118\3\2\2\2\37\u011a\3\2\2\2!\u0121\3\2"+
-               
"\2\2#\u012b\3\2\2\2%\u013a\3\2\2\2\'\u0146\3\2\2\2)\u014c\3\2\2\2+\u0168"+
-               
"\3\2\2\2-\u016a\3\2\2\2/\u0175\3\2\2\2\61\u0177\3\2\2\2\63\u0183\3\2\2"+
-               
"\2\65\u0189\3\2\2\2\67\u018b\3\2\2\29\u018d\3\2\2\2;\u018f\3\2\2\2=\u0191"+
-               
"\3\2\2\2?\u0193\3\2\2\2A\u0195\3\2\2\2CD\7h\2\2DE\7t\2\2EF\7q\2\2FG\7"+
-               
"o\2\2G\4\3\2\2\2HI\7h\2\2IJ\7k\2\2JK\7n\2\2KL\7v\2\2LM\7g\2\2MN\7t\2\2"+
-               
"N\6\3\2\2\2OP\7C\2\2PQ\7n\2\2QR\7n\2\2R\b\3\2\2\2ST\7U\2\2TU\7g\2\2UV"+
-               
"\7t\2\2VW\7x\2\2WX\7k\2\2XY\7e\2\2YZ\7g\2\2Z\n\3\2\2\2[\\\7U\2\2\\]\7"+
-               
"g\2\2]^\7t\2\2^_\7x\2\2_`\7k\2\2`a\7e\2\2ab\7g\2\2bc\7K\2\2cd\7p\2\2d"+
-               
"e\7u\2\2ef\7v\2\2fg\7c\2\2gh\7p\2\2hi\7e\2\2ij\7g\2\2j\f\3\2\2\2kl\7G"+
-               
"\2\2lm\7p\2\2mn\7f\2\2no\7r\2\2op\7q\2\2pq\7k\2\2qr\7p\2\2rs\7v\2\2s\16"+
-               
"\3\2\2\2tu\7U\2\2uv\7g\2\2vw\7t\2\2wx\7x\2\2xy\7k\2\2yz\7e\2\2z{\7g\2"+
-               
"\2{|\7T\2\2|}\7g\2\2}~\7n\2\2~\177\7c\2\2\177\u0080\7v\2\2\u0080\u0081"+
-               
"\7k\2\2\u0081\u0082\7q\2\2\u0082\u0083\7p\2\2\u0083\20\3\2\2\2\u0084\u0085"+
-               
"\7U\2\2\u0085\u0086\7g\2\2\u0086\u0087\7t\2\2\u0087\u0088\7x\2\2\u0088"+
-               
"\u0089\7k\2\2\u0089\u008a\7e\2\2\u008a\u008b\7g\2\2\u008b\u008c\7K\2\2"+
-               
"\u008c\u008d\7p\2\2\u008d\u008e\7u\2\2\u008e\u008f\7v\2\2\u008f\u0090"+
-               
"\7c\2\2\u0090\u0091\7p\2\2\u0091\u0092\7e\2\2\u0092\u0093\7g\2\2\u0093"+
-               
"\u0094\7T\2\2\u0094\u0095\7g\2\2\u0095\u0096\7n\2\2\u0096\u0097\7c\2\2"+
-               
"\u0097\u0098\7v\2\2\u0098\u0099\7k\2\2\u0099\u009a\7q\2\2\u009a\u009b"+
-               
"\7p\2\2\u009b\22\3\2\2\2\u009c\u009d\7G\2\2\u009d\u009e\7p\2\2\u009e\u009f"+
-               
"\7f\2\2\u009f\u00a0\7r\2\2\u00a0\u00a1\7q\2\2\u00a1\u00a2\7k\2\2\u00a2"+
-               
"\u00a3\7p\2\2\u00a3\u00a4\7v\2\2\u00a4\u00a5\7T\2\2\u00a5\u00a6\7g\2\2"+
-               
"\u00a6\u00a7\7n\2\2\u00a7\u00a8\7c\2\2\u00a8\u00a9\7v\2\2\u00a9\u00aa"+
-               
"\7k\2\2\u00aa\u00ab\7q\2\2\u00ab\u00ac\7p\2\2\u00ac\24\3\2\2\2\u00ad\u00ae"+
-               
"\7U\2\2\u00ae\u00af\7g\2\2\u00af\u00b0\7t\2\2\u00b0\u00b1\7x\2\2\u00b1"+
-               
"\u00b2\7k\2\2\u00b2\u00b3\7e\2\2\u00b3\u00b4\7g\2\2\u00b4\u00b5\7K\2\2"+
-               
"\u00b5\u00b6\7p\2\2\u00b6\u00b7\7u\2\2\u00b7\u00b8\7v\2\2\u00b8\u00b9"+
-               
"\7c\2\2\u00b9\u00ba\7p\2\2\u00ba\u00bb\7e\2\2\u00bb\u00bc\7g\2\2\u00bc"+
-               
"\u00bd\7a\2\2\u00bd\u00be\7L\2\2\u00be\u00bf\7X\2\2\u00bf\u00c0\7O\2\2"+
-               
"\u00c0\u00c1\7a\2\2\u00c1\u00c2\7E\2\2\u00c2\u00c3\7R\2\2\u00c3\u00c4"+
-               
"\7W\2\2\u00c4\26\3\2\2\2\u00c5\u00c6\7U\2\2\u00c6\u00c7\7g\2\2\u00c7\u00c8"+
-               
"\7t\2\2\u00c8\u00c9\7x\2\2\u00c9\u00ca\7k\2\2\u00ca\u00cb\7e\2\2\u00cb"+
-               
"\u00cc\7g\2\2\u00cc\u00cd\7K\2\2\u00cd\u00ce\7p\2\2\u00ce\u00cf\7u\2\2"+
-               
"\u00cf\u00d0\7v\2\2\u00d0\u00d1\7c\2\2\u00d1\u00d2\7p\2\2\u00d2\u00d3"+
-               
"\7e\2\2\u00d3\u00d4\7g\2\2\u00d4\u00d5\7a\2\2\u00d5\u00d6\7L\2\2\u00d6"+
-               
"\u00d7\7X\2\2\u00d7\u00d8\7O\2\2\u00d8\u00d9\7a\2\2\u00d9\u00da\7E\2\2"+
-               
"\u00da\u00db\7R\2\2\u00db\u00dc\7W\2\2\u00dc\30\3\2\2\2\u00dd\u00de\7"+
-               
"U\2\2\u00de\u00df\7g\2\2\u00df\u00e0\7t\2\2\u00e0\u00e1\7x\2\2\u00e1\u00e2"+
-               
"\7k\2\2\u00e2\u00e3\7e\2\2\u00e3\u00e4\7g\2\2\u00e4\u00e5\7K\2\2\u00e5"+
-               
"\u00e6\7p\2\2\u00e6\u00e7\7u\2\2\u00e7\u00e8\7v\2\2\u00e8\u00e9\7c\2\2"+
-               
"\u00e9\u00ea\7p\2\2\u00ea\u00eb\7e\2\2\u00eb\u00ec\7g\2\2\u00ec\u00ed"+
-               
"\7a\2\2\u00ed\u00ee\7L\2\2\u00ee\u00ef\7X\2\2\u00ef\u00f0\7O\2\2\u00f0"+
-               
"\u00f1\7a\2\2\u00f1\u00f2\7O\2\2\u00f2\u00f3\7g\2\2\u00f3\u00f4\7o\2\2"+
-               
"\u00f4\u00f5\7q\2\2\u00f5\u00f6\7t\2\2\u00f6\u00f7\7{\2\2\u00f7\u00f8"+
-               
"\7a\2\2\u00f8\u00f9\7R\2\2\u00f9\u00fa\7q\2\2\u00fa\u00fb\7q\2\2\u00fb"+
-               
"\u00fc\7n\2\2\u00fc\32\3\2\2\2\u00fd\u010b\7\62\2\2\u00fe\u0108\t\2\2"+
-               
"\2\u00ff\u0101\5\61\31\2\u0100\u00ff\3\2\2\2\u0100\u0101\3\2\2\2\u0101"+
-               
"\u0109\3\2\2\2\u0102\u0104\7a\2\2\u0103\u0102\3\2\2\2\u0104\u0105\3\2"+
-               
"\2\2\u0105\u0103\3\2\2\2\u0105\u0106\3\2\2\2\u0106\u0107\3\2\2\2\u0107"+
-               
"\u0109\5\61\31\2\u0108\u0100\3\2\2\2\u0108\u0103\3\2\2\2\u0109\u010b\3"+
-               
"\2\2\2\u010a\u00fd\3\2\2\2\u010a\u00fe\3\2\2\2\u010b\u010d\3\2\2\2\u010c"+
-               
"\u010e\t\3\2\2\u010d\u010c\3\2\2\2\u010d\u010e\3\2\2\2\u010e\34\3\2\2"+
-               
"\2\u010f\u0110\7v\2\2\u0110\u0111\7t\2\2\u0111\u0112\7w\2\2\u0112\u0119"+
-               
"\7g\2\2\u0113\u0114\7h\2\2\u0114\u0115\7c\2\2\u0115\u0116\7n\2\2\u0116"+
-               
"\u0117\7u\2\2\u0117\u0119\7g\2\2\u0118\u010f\3\2\2\2\u0118\u0113\3\2\2"+
-               
"\2\u0119\36\3\2\2\2\u011a\u011d\7)\2\2\u011b\u011e\n\4\2\2\u011c\u011e"+
-               
"\5+\26\2\u011d\u011b\3\2\2\2\u011d\u011c\3\2\2\2\u011e\u011f\3\2\2\2\u011f"+
-               "\u0120\7)\2\2\u0120 
\3\2\2\2\u0121\u0126\7$\2\2\u0122\u0125\n\5\2\2\u0123"+
-               
"\u0125\5+\26\2\u0124\u0122\3\2\2\2\u0124\u0123\3\2\2\2\u0125\u0128\3\2"+
-               
"\2\2\u0126\u0124\3\2\2\2\u0126\u0127\3\2\2\2\u0127\u0129\3\2\2\2\u0128"+
-               
"\u0126\3\2\2\2\u0129\u012a\7$\2\2\u012a\"\3\2\2\2\u012b\u012c\7\61\2\2"+
-               
"\u012c\u012d\7,\2\2\u012d\u0132\3\2\2\2\u012e\u0131\5#\22\2\u012f\u0131"+
-               
"\13\2\2\2\u0130\u012e\3\2\2\2\u0130\u012f\3\2\2\2\u0131\u0134\3\2\2\2"+
-               
"\u0132\u0133\3\2\2\2\u0132\u0130\3\2\2\2\u0133\u0135\3\2\2\2\u0134\u0132"+
-               
"\3\2\2\2\u0135\u0136\7,\2\2\u0136\u0137\7\61\2\2\u0137\u0138\3\2\2\2\u0138"+
-               
"\u0139\b\22\2\2\u0139$\3\2\2\2\u013a\u013b\7\61\2\2\u013b\u013c\7\61\2"+
-               
"\2\u013c\u0140\3\2\2\2\u013d\u013f\n\6\2\2\u013e\u013d\3\2\2\2\u013f\u0142"+
-               
"\3\2\2\2\u0140\u013e\3\2\2\2\u0140\u0141\3\2\2\2\u0141\u0143\3\2\2\2\u0142"+
-               
"\u0140\3\2\2\2\u0143\u0144\b\23\2\2\u0144&\3\2\2\2\u0145\u0147\t\7\2\2"+
-               
"\u0146\u0145\3\2\2\2\u0147\u0148\3\2\2\2\u0148\u0146\3\2\2\2\u0148\u0149"+
-               
"\3\2\2\2\u0149\u014a\3\2\2\2\u014a\u014b\b\24\2\2\u014b(\3\2\2\2\u014c"+
-               
"\u0150\5\65\33\2\u014d\u014f\5\63\32\2\u014e\u014d\3\2\2\2\u014f\u0152"+
-               
"\3\2\2\2\u0150\u014e\3\2\2\2\u0150\u0151\3\2\2\2\u0151*\3\2\2\2\u0152"+
-               
"\u0150\3\2\2\2\u0153\u0154\7^\2\2\u0154\u0169\t\b\2\2\u0155\u015a\7^\2"+
-               
"\2\u0156\u0158\t\t\2\2\u0157\u0156\3\2\2\2\u0157\u0158\3\2\2\2\u0158\u0159"+
-               
"\3\2\2\2\u0159\u015b\t\n\2\2\u015a\u0157\3\2\2\2\u015a\u015b\3\2\2\2\u015b"+
-               
"\u015c\3\2\2\2\u015c\u0169\t\n\2\2\u015d\u015f\7^\2\2\u015e\u0160\7w\2"+
-               
"\2\u015f\u015e\3\2\2\2\u0160\u0161\3\2\2\2\u0161\u015f\3\2\2\2\u0161\u0162"+
-               
"\3\2\2\2\u0162\u0163\3\2\2\2\u0163\u0164\5/\30\2\u0164\u0165\5/\30\2\u0165"+
-               
"\u0166\5/\30\2\u0166\u0167\5/\30\2\u0167\u0169\3\2\2\2\u0168\u0153\3\2"+
-               
"\2\2\u0168\u0155\3\2\2\2\u0168\u015d\3\2\2\2\u0169,\3\2\2\2\u016a\u0173"+
-               
"\5/\30\2\u016b\u016e\5/\30\2\u016c\u016e\7a\2\2\u016d\u016b\3\2\2\2\u016d"+
-               
"\u016c\3\2\2\2\u016e\u0171\3\2\2\2\u016f\u016d\3\2\2\2\u016f\u0170\3\2"+
-               
"\2\2\u0170\u0172\3\2\2\2\u0171\u016f\3\2\2\2\u0172\u0174\5/\30\2\u0173"+
-               
"\u016f\3\2\2\2\u0173\u0174\3\2\2\2\u0174.\3\2\2\2\u0175\u0176\t\13\2\2"+
-               
"\u0176\60\3\2\2\2\u0177\u017f\t\f\2\2\u0178\u017a\t\r\2\2\u0179\u0178"+
-               
"\3\2\2\2\u017a\u017d\3\2\2\2\u017b\u0179\3\2\2\2\u017b\u017c\3\2\2\2\u017c"+
-               
"\u017e\3\2\2\2\u017d\u017b\3\2\2\2\u017e\u0180\t\f\2\2\u017f\u017b\3\2"+
-               
"\2\2\u017f\u0180\3\2\2\2\u0180\62\3\2\2\2\u0181\u0184\5\65\33\2\u0182"+
-               
"\u0184\t\f\2\2\u0183\u0181\3\2\2\2\u0183\u0182\3\2\2\2\u0184\64\3\2\2"+
-               
"\2\u0185\u018a\t\16\2\2\u0186\u018a\n\17\2\2\u0187\u0188\t\20\2\2\u0188"+
-               
"\u018a\t\21\2\2\u0189\u0185\3\2\2\2\u0189\u0186\3\2\2\2\u0189\u0187\3"+
-               
"\2\2\2\u018a\66\3\2\2\2\u018b\u018c\7\60\2\2\u018c8\3\2\2\2\u018d\u018e"+
-               
"\7*\2\2\u018e:\3\2\2\2\u018f\u0190\7+\2\2\u0190<\3\2\2\2\u0191\u0192\7"+
-               
".\2\2\u0192>\3\2\2\2\u0193\u0194\7=\2\2\u0194@\3\2\2\2\u0195\u0196\7?"+
-               
"\2\2\u0196B\3\2\2\2\34\2\u0100\u0105\u0108\u010a\u010d\u0118\u011d\u0124"+
-               
"\u0126\u0130\u0132\u0140\u0148\u0150\u0157\u015a\u0161\u0168\u016d\u016f"+
-               "\u0173\u017b\u017f\u0183\u0189\3\2\3\2";
-       public static final ATN _ATN =
-               new ATNDeserializer().deserialize(_serializedATN.toCharArray());
-       static {
-               _decisionToDFA = new DFA[_ATN.getNumberOfDecisions()];
-               for (int i = 0; i < _ATN.getNumberOfDecisions(); i++) {
-                       _decisionToDFA[i] = new DFA(_ATN.getDecisionState(i), 
i);
-               }
-       }
-}
\ No newline at end of file
diff --git 
a/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParser.interp
 
b/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParser.interp
deleted file mode 100644
index cf82033..0000000
--- 
a/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParser.interp
+++ /dev/null
@@ -1,71 +0,0 @@
-token literal names:
-null
-'from'
-'filter'
-'All'
-'Service'
-'ServiceInstance'
-'Endpoint'
-'ServiceRelation'
-'ServiceInstanceRelation'
-'EndpointRelation'
-null
-null
-'ServiceInstance_JVM_Memory_Pool'
-null
-null
-null
-null
-null
-null
-null
-null
-'.'
-'('
-')'
-','
-';'
-'='
-
-token symbolic names:
-null
-FROM
-FILTER
-SRC_ALL
-SRC_SERVICE
-SRC_SERVICE_INSTANCE
-SRC_ENDPOINT
-SRC_SERVICE_RELATION
-SRC_SERVICE_INSTANCE_RELATION
-SRC_ENDPOINT_RELATION
-SRC_SERVICE_INSTANCE_JVM_CPU
-SRC_SERVICE_INSTANCE_JVM_MEMORY
-SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL
-DECIMAL_LITERAL
-BOOL_LITERAL
-CHAR_LITERAL
-STRING_LITERAL
-DelimitedComment
-LineComment
-SPACE
-IDENTIFIER
-DOT
-LR_BRACKET
-RR_BRACKET
-COMMA
-SEMI
-EQUAL
-
-rule names:
-root
-aggregationStatement
-metricStatement
-source
-variable
-aggregateFunction
-functionName
-filterExpression
-
-
-atn:
-[3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 3, 28, 66, 4, 2, 
9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9, 7, 4, 8, 9, 8, 
4, 9, 9, 9, 3, 2, 7, 2, 20, 10, 2, 12, 2, 14, 2, 23, 11, 2, 3, 3, 3, 3, 5, 3, 
27, 10, 3, 3, 3, 3, 3, 5, 3, 31, 10, 3, 3, 3, 3, 3, 5, 3, 35, 10, 3, 3, 3, 5, 
3, 38, 10, 3, 3, 3, 3, 3, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 
3, 5, 3, 5, 3, 6, 3, 6, 3, 7, 3, 7, 3, 7, 5, 7, 58, 10, 7, 3, 7, 3, 7, 3, 8, 3, 
8, 3, 9, 3, 9, 3, 9,  [...]
\ No newline at end of file
diff --git 
a/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParser.java
 
b/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParser.java
deleted file mode 100644
index 4fe5c7a..0000000
--- 
a/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParser.java
+++ /dev/null
@@ -1,570 +0,0 @@
-// Generated from org/apache/skywalking/oal/tool/grammar/OALParser.g4 by ANTLR 
4.7.1
-package org.apache.skywalking.oal.tool.grammar;
-import org.antlr.v4.runtime.atn.*;
-import org.antlr.v4.runtime.dfa.DFA;
-import org.antlr.v4.runtime.*;
-import org.antlr.v4.runtime.misc.*;
-import org.antlr.v4.runtime.tree.*;
-import java.util.List;
-import java.util.Iterator;
-import java.util.ArrayList;
-
-@SuppressWarnings({"all", "warnings", "unchecked", "unused", "cast"})
-public class OALParser extends Parser {
-       static { RuntimeMetaData.checkVersion("4.7.1", 
RuntimeMetaData.VERSION); }
-
-       protected static final DFA[] _decisionToDFA;
-       protected static final PredictionContextCache _sharedContextCache =
-               new PredictionContextCache();
-       public static final int
-               FROM=1, FILTER=2, SRC_ALL=3, SRC_SERVICE=4, 
SRC_SERVICE_INSTANCE=5, SRC_ENDPOINT=6, 
-               SRC_SERVICE_RELATION=7, SRC_SERVICE_INSTANCE_RELATION=8, 
SRC_ENDPOINT_RELATION=9, 
-               SRC_SERVICE_INSTANCE_JVM_CPU=10, 
SRC_SERVICE_INSTANCE_JVM_MEMORY=11, SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL=12, 
-               DECIMAL_LITERAL=13, BOOL_LITERAL=14, CHAR_LITERAL=15, 
STRING_LITERAL=16, 
-               DelimitedComment=17, LineComment=18, SPACE=19, IDENTIFIER=20, 
DOT=21, 
-               LR_BRACKET=22, RR_BRACKET=23, COMMA=24, SEMI=25, EQUAL=26;
-       public static final int
-               RULE_root = 0, RULE_aggregationStatement = 1, 
RULE_metricStatement = 2, 
-               RULE_source = 3, RULE_variable = 4, RULE_aggregateFunction = 5, 
RULE_functionName = 6, 
-               RULE_filterExpression = 7;
-       public static final String[] ruleNames = {
-               "root", "aggregationStatement", "metricStatement", "source", 
"variable", 
-               "aggregateFunction", "functionName", "filterExpression"
-       };
-
-       private static final String[] _LITERAL_NAMES = {
-               null, "'from'", "'filter'", "'All'", "'Service'", 
"'ServiceInstance'", 
-               "'Endpoint'", "'ServiceRelation'", "'ServiceInstanceRelation'", 
"'EndpointRelation'", 
-               null, null, "'ServiceInstance_JVM_Memory_Pool'", null, null, 
null, null, 
-               null, null, null, null, "'.'", "'('", "')'", "','", "';'", "'='"
-       };
-       private static final String[] _SYMBOLIC_NAMES = {
-               null, "FROM", "FILTER", "SRC_ALL", "SRC_SERVICE", 
"SRC_SERVICE_INSTANCE", 
-               "SRC_ENDPOINT", "SRC_SERVICE_RELATION", 
"SRC_SERVICE_INSTANCE_RELATION", 
-               "SRC_ENDPOINT_RELATION", "SRC_SERVICE_INSTANCE_JVM_CPU", 
"SRC_SERVICE_INSTANCE_JVM_MEMORY", 
-               "SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL", "DECIMAL_LITERAL", 
"BOOL_LITERAL", 
-               "CHAR_LITERAL", "STRING_LITERAL", "DelimitedComment", 
"LineComment", "SPACE", 
-               "IDENTIFIER", "DOT", "LR_BRACKET", "RR_BRACKET", "COMMA", 
"SEMI", "EQUAL"
-       };
-       public static final Vocabulary VOCABULARY = new 
VocabularyImpl(_LITERAL_NAMES, _SYMBOLIC_NAMES);
-
-       /**
-        * @deprecated Use {@link #VOCABULARY} instead.
-        */
-       @Deprecated
-       public static final String[] tokenNames;
-       static {
-               tokenNames = new String[_SYMBOLIC_NAMES.length];
-               for (int i = 0; i < tokenNames.length; i++) {
-                       tokenNames[i] = VOCABULARY.getLiteralName(i);
-                       if (tokenNames[i] == null) {
-                               tokenNames[i] = VOCABULARY.getSymbolicName(i);
-                       }
-
-                       if (tokenNames[i] == null) {
-                               tokenNames[i] = "<INVALID>";
-                       }
-               }
-       }
-
-       @Override
-       @Deprecated
-       public String[] getTokenNames() {
-               return tokenNames;
-       }
-
-       @Override
-
-       public Vocabulary getVocabulary() {
-               return VOCABULARY;
-       }
-
-       @Override
-       public String getGrammarFileName() { return "OALParser.g4"; }
-
-       @Override
-       public String[] getRuleNames() { return ruleNames; }
-
-       @Override
-       public String getSerializedATN() { return _serializedATN; }
-
-       @Override
-       public ATN getATN() { return _ATN; }
-
-       public OALParser(TokenStream input) {
-               super(input);
-               _interp = new 
ParserATNSimulator(this,_ATN,_decisionToDFA,_sharedContextCache);
-       }
-       public static class RootContext extends ParserRuleContext {
-               public List<AggregationStatementContext> aggregationStatement() 
{
-                       return 
getRuleContexts(AggregationStatementContext.class);
-               }
-               public AggregationStatementContext aggregationStatement(int i) {
-                       return 
getRuleContext(AggregationStatementContext.class,i);
-               }
-               public RootContext(ParserRuleContext parent, int invokingState) 
{
-                       super(parent, invokingState);
-               }
-               @Override public int getRuleIndex() { return RULE_root; }
-               @Override
-               public void enterRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).enterRoot(this);
-               }
-               @Override
-               public void exitRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).exitRoot(this);
-               }
-       }
-
-       public final RootContext root() throws RecognitionException {
-               RootContext _localctx = new RootContext(_ctx, getState());
-               enterRule(_localctx, 0, RULE_root);
-               int _la;
-               try {
-                       enterOuterAlt(_localctx, 1);
-                       {
-                       setState(19);
-                       _errHandler.sync(this);
-                       _la = _input.LA(1);
-                       while (_la==IDENTIFIER) {
-                               {
-                               {
-                               setState(16);
-                               aggregationStatement();
-                               }
-                               }
-                               setState(21);
-                               _errHandler.sync(this);
-                               _la = _input.LA(1);
-                       }
-                       }
-               }
-               catch (RecognitionException re) {
-                       _localctx.exception = re;
-                       _errHandler.reportError(this, re);
-                       _errHandler.recover(this, re);
-               }
-               finally {
-                       exitRule();
-               }
-               return _localctx;
-       }
-
-       public static class AggregationStatementContext extends 
ParserRuleContext {
-               public VariableContext variable() {
-                       return getRuleContext(VariableContext.class,0);
-               }
-               public TerminalNode EQUAL() { return getToken(OALParser.EQUAL, 
0); }
-               public MetricStatementContext metricStatement() {
-                       return getRuleContext(MetricStatementContext.class,0);
-               }
-               public TerminalNode SEMI() { return getToken(OALParser.SEMI, 
0); }
-               public TerminalNode EOF() { return getToken(OALParser.EOF, 0); }
-               public List<TerminalNode> SPACE() { return 
getTokens(OALParser.SPACE); }
-               public TerminalNode SPACE(int i) {
-                       return getToken(OALParser.SPACE, i);
-               }
-               public TerminalNode DelimitedComment() { return 
getToken(OALParser.DelimitedComment, 0); }
-               public TerminalNode LineComment() { return 
getToken(OALParser.LineComment, 0); }
-               public AggregationStatementContext(ParserRuleContext parent, 
int invokingState) {
-                       super(parent, invokingState);
-               }
-               @Override public int getRuleIndex() { return 
RULE_aggregationStatement; }
-               @Override
-               public void enterRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).enterAggregationStatement(this);
-               }
-               @Override
-               public void exitRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).exitAggregationStatement(this);
-               }
-       }
-
-       public final AggregationStatementContext aggregationStatement() throws 
RecognitionException {
-               AggregationStatementContext _localctx = new 
AggregationStatementContext(_ctx, getState());
-               enterRule(_localctx, 2, RULE_aggregationStatement);
-               int _la;
-               try {
-                       enterOuterAlt(_localctx, 1);
-                       {
-                       setState(22);
-                       variable();
-                       setState(24);
-                       _errHandler.sync(this);
-                       _la = _input.LA(1);
-                       if (_la==SPACE) {
-                               {
-                               setState(23);
-                               match(SPACE);
-                               }
-                       }
-
-                       setState(26);
-                       match(EQUAL);
-                       setState(28);
-                       _errHandler.sync(this);
-                       _la = _input.LA(1);
-                       if (_la==SPACE) {
-                               {
-                               setState(27);
-                               match(SPACE);
-                               }
-                       }
-
-                       setState(30);
-                       metricStatement();
-                       setState(32);
-                       _errHandler.sync(this);
-                       _la = _input.LA(1);
-                       if (_la==DelimitedComment) {
-                               {
-                               setState(31);
-                               match(DelimitedComment);
-                               }
-                       }
-
-                       setState(35);
-                       _errHandler.sync(this);
-                       _la = _input.LA(1);
-                       if (_la==LineComment) {
-                               {
-                               setState(34);
-                               match(LineComment);
-                               }
-                       }
-
-                       setState(37);
-                       _la = _input.LA(1);
-                       if ( !(_la==EOF || _la==SEMI) ) {
-                       _errHandler.recoverInline(this);
-                       }
-                       else {
-                               if ( _input.LA(1)==Token.EOF ) matchedEOF = 
true;
-                               _errHandler.reportMatch(this);
-                               consume();
-                       }
-                       }
-               }
-               catch (RecognitionException re) {
-                       _localctx.exception = re;
-                       _errHandler.reportError(this, re);
-                       _errHandler.recover(this, re);
-               }
-               finally {
-                       exitRule();
-               }
-               return _localctx;
-       }
-
-       public static class MetricStatementContext extends ParserRuleContext {
-               public TerminalNode FROM() { return getToken(OALParser.FROM, 
0); }
-               public TerminalNode LR_BRACKET() { return 
getToken(OALParser.LR_BRACKET, 0); }
-               public SourceContext source() {
-                       return getRuleContext(SourceContext.class,0);
-               }
-               public List<TerminalNode> DOT() { return 
getTokens(OALParser.DOT); }
-               public TerminalNode DOT(int i) {
-                       return getToken(OALParser.DOT, i);
-               }
-               public TerminalNode IDENTIFIER() { return 
getToken(OALParser.IDENTIFIER, 0); }
-               public TerminalNode RR_BRACKET() { return 
getToken(OALParser.RR_BRACKET, 0); }
-               public AggregateFunctionContext aggregateFunction() {
-                       return getRuleContext(AggregateFunctionContext.class,0);
-               }
-               public MetricStatementContext(ParserRuleContext parent, int 
invokingState) {
-                       super(parent, invokingState);
-               }
-               @Override public int getRuleIndex() { return 
RULE_metricStatement; }
-               @Override
-               public void enterRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).enterMetricStatement(this);
-               }
-               @Override
-               public void exitRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).exitMetricStatement(this);
-               }
-       }
-
-       public final MetricStatementContext metricStatement() throws 
RecognitionException {
-               MetricStatementContext _localctx = new 
MetricStatementContext(_ctx, getState());
-               enterRule(_localctx, 4, RULE_metricStatement);
-               try {
-                       enterOuterAlt(_localctx, 1);
-                       {
-                       setState(39);
-                       match(FROM);
-                       setState(40);
-                       match(LR_BRACKET);
-                       setState(41);
-                       source();
-                       setState(42);
-                       match(DOT);
-                       setState(43);
-                       match(IDENTIFIER);
-                       setState(44);
-                       match(RR_BRACKET);
-                       setState(45);
-                       match(DOT);
-                       setState(46);
-                       aggregateFunction();
-                       }
-               }
-               catch (RecognitionException re) {
-                       _localctx.exception = re;
-                       _errHandler.reportError(this, re);
-                       _errHandler.recover(this, re);
-               }
-               finally {
-                       exitRule();
-               }
-               return _localctx;
-       }
-
-       public static class SourceContext extends ParserRuleContext {
-               public TerminalNode SRC_ALL() { return 
getToken(OALParser.SRC_ALL, 0); }
-               public TerminalNode SRC_SERVICE() { return 
getToken(OALParser.SRC_SERVICE, 0); }
-               public TerminalNode SRC_SERVICE_INSTANCE() { return 
getToken(OALParser.SRC_SERVICE_INSTANCE, 0); }
-               public TerminalNode SRC_ENDPOINT() { return 
getToken(OALParser.SRC_ENDPOINT, 0); }
-               public TerminalNode SRC_SERVICE_RELATION() { return 
getToken(OALParser.SRC_SERVICE_RELATION, 0); }
-               public TerminalNode SRC_SERVICE_INSTANCE_RELATION() { return 
getToken(OALParser.SRC_SERVICE_INSTANCE_RELATION, 0); }
-               public TerminalNode SRC_ENDPOINT_RELATION() { return 
getToken(OALParser.SRC_ENDPOINT_RELATION, 0); }
-               public TerminalNode SRC_SERVICE_INSTANCE_JVM_CPU() { return 
getToken(OALParser.SRC_SERVICE_INSTANCE_JVM_CPU, 0); }
-               public TerminalNode SRC_SERVICE_INSTANCE_JVM_MEMORY() { return 
getToken(OALParser.SRC_SERVICE_INSTANCE_JVM_MEMORY, 0); }
-               public TerminalNode SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL() { 
return getToken(OALParser.SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL, 0); }
-               public SourceContext(ParserRuleContext parent, int 
invokingState) {
-                       super(parent, invokingState);
-               }
-               @Override public int getRuleIndex() { return RULE_source; }
-               @Override
-               public void enterRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).enterSource(this);
-               }
-               @Override
-               public void exitRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).exitSource(this);
-               }
-       }
-
-       public final SourceContext source() throws RecognitionException {
-               SourceContext _localctx = new SourceContext(_ctx, getState());
-               enterRule(_localctx, 6, RULE_source);
-               int _la;
-               try {
-                       enterOuterAlt(_localctx, 1);
-                       {
-                       setState(48);
-                       _la = _input.LA(1);
-                       if ( !((((_la) & ~0x3f) == 0 && ((1L << _la) & ((1L << 
SRC_ALL) | (1L << SRC_SERVICE) | (1L << SRC_SERVICE_INSTANCE) | (1L << 
SRC_ENDPOINT) | (1L << SRC_SERVICE_RELATION) | (1L << 
SRC_SERVICE_INSTANCE_RELATION) | (1L << SRC_ENDPOINT_RELATION) | (1L << 
SRC_SERVICE_INSTANCE_JVM_CPU) | (1L << SRC_SERVICE_INSTANCE_JVM_MEMORY) | (1L 
<< SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL))) != 0)) ) {
-                       _errHandler.recoverInline(this);
-                       }
-                       else {
-                               if ( _input.LA(1)==Token.EOF ) matchedEOF = 
true;
-                               _errHandler.reportMatch(this);
-                               consume();
-                       }
-                       }
-               }
-               catch (RecognitionException re) {
-                       _localctx.exception = re;
-                       _errHandler.reportError(this, re);
-                       _errHandler.recover(this, re);
-               }
-               finally {
-                       exitRule();
-               }
-               return _localctx;
-       }
-
-       public static class VariableContext extends ParserRuleContext {
-               public TerminalNode IDENTIFIER() { return 
getToken(OALParser.IDENTIFIER, 0); }
-               public VariableContext(ParserRuleContext parent, int 
invokingState) {
-                       super(parent, invokingState);
-               }
-               @Override public int getRuleIndex() { return RULE_variable; }
-               @Override
-               public void enterRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).enterVariable(this);
-               }
-               @Override
-               public void exitRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).exitVariable(this);
-               }
-       }
-
-       public final VariableContext variable() throws RecognitionException {
-               VariableContext _localctx = new VariableContext(_ctx, 
getState());
-               enterRule(_localctx, 8, RULE_variable);
-               try {
-                       enterOuterAlt(_localctx, 1);
-                       {
-                       setState(50);
-                       match(IDENTIFIER);
-                       }
-               }
-               catch (RecognitionException re) {
-                       _localctx.exception = re;
-                       _errHandler.reportError(this, re);
-                       _errHandler.recover(this, re);
-               }
-               finally {
-                       exitRule();
-               }
-               return _localctx;
-       }
-
-       public static class AggregateFunctionContext extends ParserRuleContext {
-               public FunctionNameContext functionName() {
-                       return getRuleContext(FunctionNameContext.class,0);
-               }
-               public TerminalNode LR_BRACKET() { return 
getToken(OALParser.LR_BRACKET, 0); }
-               public TerminalNode RR_BRACKET() { return 
getToken(OALParser.RR_BRACKET, 0); }
-               public FilterExpressionContext filterExpression() {
-                       return getRuleContext(FilterExpressionContext.class,0);
-               }
-               public AggregateFunctionContext(ParserRuleContext parent, int 
invokingState) {
-                       super(parent, invokingState);
-               }
-               @Override public int getRuleIndex() { return 
RULE_aggregateFunction; }
-               @Override
-               public void enterRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).enterAggregateFunction(this);
-               }
-               @Override
-               public void exitRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).exitAggregateFunction(this);
-               }
-       }
-
-       public final AggregateFunctionContext aggregateFunction() throws 
RecognitionException {
-               AggregateFunctionContext _localctx = new 
AggregateFunctionContext(_ctx, getState());
-               enterRule(_localctx, 10, RULE_aggregateFunction);
-               try {
-                       enterOuterAlt(_localctx, 1);
-                       {
-                       setState(52);
-                       functionName();
-                       setState(53);
-                       match(LR_BRACKET);
-                       setState(55);
-                       _errHandler.sync(this);
-                       switch ( 
getInterpreter().adaptivePredict(_input,5,_ctx) ) {
-                       case 1:
-                               {
-                               setState(54);
-                               filterExpression();
-                               }
-                               break;
-                       }
-                       setState(57);
-                       match(RR_BRACKET);
-                       }
-               }
-               catch (RecognitionException re) {
-                       _localctx.exception = re;
-                       _errHandler.reportError(this, re);
-                       _errHandler.recover(this, re);
-               }
-               finally {
-                       exitRule();
-               }
-               return _localctx;
-       }
-
-       public static class FunctionNameContext extends ParserRuleContext {
-               public TerminalNode IDENTIFIER() { return 
getToken(OALParser.IDENTIFIER, 0); }
-               public FunctionNameContext(ParserRuleContext parent, int 
invokingState) {
-                       super(parent, invokingState);
-               }
-               @Override public int getRuleIndex() { return RULE_functionName; 
}
-               @Override
-               public void enterRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).enterFunctionName(this);
-               }
-               @Override
-               public void exitRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).exitFunctionName(this);
-               }
-       }
-
-       public final FunctionNameContext functionName() throws 
RecognitionException {
-               FunctionNameContext _localctx = new FunctionNameContext(_ctx, 
getState());
-               enterRule(_localctx, 12, RULE_functionName);
-               try {
-                       enterOuterAlt(_localctx, 1);
-                       {
-                       setState(59);
-                       match(IDENTIFIER);
-                       }
-               }
-               catch (RecognitionException re) {
-                       _localctx.exception = re;
-                       _errHandler.reportError(this, re);
-                       _errHandler.recover(this, re);
-               }
-               finally {
-                       exitRule();
-               }
-               return _localctx;
-       }
-
-       public static class FilterExpressionContext extends ParserRuleContext {
-               public FilterExpressionContext(ParserRuleContext parent, int 
invokingState) {
-                       super(parent, invokingState);
-               }
-               @Override public int getRuleIndex() { return 
RULE_filterExpression; }
-               @Override
-               public void enterRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).enterFilterExpression(this);
-               }
-               @Override
-               public void exitRule(ParseTreeListener listener) {
-                       if ( listener instanceof OALParserListener ) 
((OALParserListener)listener).exitFilterExpression(this);
-               }
-       }
-
-       public final FilterExpressionContext filterExpression() throws 
RecognitionException {
-               FilterExpressionContext _localctx = new 
FilterExpressionContext(_ctx, getState());
-               enterRule(_localctx, 14, RULE_filterExpression);
-               try {
-                       enterOuterAlt(_localctx, 1);
-                       {
-                       }
-               }
-               catch (RecognitionException re) {
-                       _localctx.exception = re;
-                       _errHandler.reportError(this, re);
-                       _errHandler.recover(this, re);
-               }
-               finally {
-                       exitRule();
-               }
-               return _localctx;
-       }
-
-       public static final String _serializedATN =
-               
"\3\u608b\ua72a\u8133\ub9ed\u417c\u3be7\u7786\u5964\3\34B\4\2\t\2\4\3\t"+
-               
"\3\4\4\t\4\4\5\t\5\4\6\t\6\4\7\t\7\4\b\t\b\4\t\t\t\3\2\7\2\24\n\2\f\2"+
-               
"\16\2\27\13\2\3\3\3\3\5\3\33\n\3\3\3\3\3\5\3\37\n\3\3\3\3\3\5\3#\n\3\3"+
-               
"\3\5\3&\n\3\3\3\3\3\3\4\3\4\3\4\3\4\3\4\3\4\3\4\3\4\3\4\3\5\3\5\3\6\3"+
-               
"\6\3\7\3\7\3\7\5\7:\n\7\3\7\3\7\3\b\3\b\3\t\3\t\3\t\2\2\n\2\4\6\b\n\f"+
-               
"\16\20\2\4\3\3\33\33\3\2\5\16\2?\2\25\3\2\2\2\4\30\3\2\2\2\6)\3\2\2\2"+
-               
"\b\62\3\2\2\2\n\64\3\2\2\2\f\66\3\2\2\2\16=\3\2\2\2\20?\3\2\2\2\22\24"+
-               
"\5\4\3\2\23\22\3\2\2\2\24\27\3\2\2\2\25\23\3\2\2\2\25\26\3\2\2\2\26\3"+
-               
"\3\2\2\2\27\25\3\2\2\2\30\32\5\n\6\2\31\33\7\25\2\2\32\31\3\2\2\2\32\33"+
-               
"\3\2\2\2\33\34\3\2\2\2\34\36\7\34\2\2\35\37\7\25\2\2\36\35\3\2\2\2\36"+
-               "\37\3\2\2\2\37 \3\2\2\2 
\"\5\6\4\2!#\7\23\2\2\"!\3\2\2\2\"#\3\2\2\2#%"+
-               
"\3\2\2\2$&\7\24\2\2%$\3\2\2\2%&\3\2\2\2&\'\3\2\2\2\'(\t\2\2\2(\5\3\2\2"+
-               
"\2)*\7\3\2\2*+\7\30\2\2+,\5\b\5\2,-\7\27\2\2-.\7\26\2\2./\7\31\2\2/\60"+
-               
"\7\27\2\2\60\61\5\f\7\2\61\7\3\2\2\2\62\63\t\3\2\2\63\t\3\2\2\2\64\65"+
-               
"\7\26\2\2\65\13\3\2\2\2\66\67\5\16\b\2\679\7\30\2\28:\5\20\t\298\3\2\2"+
-               
"\29:\3\2\2\2:;\3\2\2\2;<\7\31\2\2<\r\3\2\2\2=>\7\26\2\2>\17\3\2\2\2?@"+
-               "\3\2\2\2@\21\3\2\2\2\b\25\32\36\"%9";
-       public static final ATN _ATN =
-               new ATNDeserializer().deserialize(_serializedATN.toCharArray());
-       static {
-               _decisionToDFA = new DFA[_ATN.getNumberOfDecisions()];
-               for (int i = 0; i < _ATN.getNumberOfDecisions(); i++) {
-                       _decisionToDFA[i] = new DFA(_ATN.getDecisionState(i), 
i);
-               }
-       }
-}
\ No newline at end of file
diff --git 
a/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParserBaseListener.java
 
b/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParserBaseListener.java
deleted file mode 100644
index d93d65f..0000000
--- 
a/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParserBaseListener.java
+++ /dev/null
@@ -1,135 +0,0 @@
-// Generated from org/apache/skywalking/oal/tool/grammar/OALParser.g4 by ANTLR 
4.7.1
-package org.apache.skywalking.oal.tool.grammar;
-
-import org.antlr.v4.runtime.ParserRuleContext;
-import org.antlr.v4.runtime.tree.ErrorNode;
-import org.antlr.v4.runtime.tree.TerminalNode;
-
-/**
- * This class provides an empty implementation of {@link OALParserListener},
- * which can be extended to create a listener which only needs to handle a 
subset
- * of the available methods.
- */
-public class OALParserBaseListener implements OALParserListener {
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void enterRoot(OALParser.RootContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void exitRoot(OALParser.RootContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void 
enterAggregationStatement(OALParser.AggregationStatementContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void 
exitAggregationStatement(OALParser.AggregationStatementContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void 
enterMetricStatement(OALParser.MetricStatementContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void 
exitMetricStatement(OALParser.MetricStatementContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void enterSource(OALParser.SourceContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void exitSource(OALParser.SourceContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void enterVariable(OALParser.VariableContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void exitVariable(OALParser.VariableContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void 
enterAggregateFunction(OALParser.AggregateFunctionContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void 
exitAggregateFunction(OALParser.AggregateFunctionContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void enterFunctionName(OALParser.FunctionNameContext 
ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void exitFunctionName(OALParser.FunctionNameContext 
ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void 
enterFilterExpression(OALParser.FilterExpressionContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void 
exitFilterExpression(OALParser.FilterExpressionContext ctx) { }
-
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void enterEveryRule(ParserRuleContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void exitEveryRule(ParserRuleContext ctx) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void visitTerminal(TerminalNode node) { }
-       /**
-        * {@inheritDoc}
-        *
-        * <p>The default implementation does nothing.</p>
-        */
-       @Override public void visitErrorNode(ErrorNode node) { }
-}
\ No newline at end of file
diff --git 
a/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParserListener.java
 
b/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParserListener.java
deleted file mode 100644
index 2287337..0000000
--- 
a/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParserListener.java
+++ /dev/null
@@ -1,90 +0,0 @@
-// Generated from org/apache/skywalking/oal/tool/grammar/OALParser.g4 by ANTLR 
4.7.1
-package org.apache.skywalking.oal.tool.grammar;
-import org.antlr.v4.runtime.tree.ParseTreeListener;
-
-/**
- * This interface defines a complete listener for a parse tree produced by
- * {@link OALParser}.
- */
-public interface OALParserListener extends ParseTreeListener {
-       /**
-        * Enter a parse tree produced by {@link OALParser#root}.
-        * @param ctx the parse tree
-        */
-       void enterRoot(OALParser.RootContext ctx);
-       /**
-        * Exit a parse tree produced by {@link OALParser#root}.
-        * @param ctx the parse tree
-        */
-       void exitRoot(OALParser.RootContext ctx);
-       /**
-        * Enter a parse tree produced by {@link 
OALParser#aggregationStatement}.
-        * @param ctx the parse tree
-        */
-       void enterAggregationStatement(OALParser.AggregationStatementContext 
ctx);
-       /**
-        * Exit a parse tree produced by {@link OALParser#aggregationStatement}.
-        * @param ctx the parse tree
-        */
-       void exitAggregationStatement(OALParser.AggregationStatementContext 
ctx);
-       /**
-        * Enter a parse tree produced by {@link OALParser#metricStatement}.
-        * @param ctx the parse tree
-        */
-       void enterMetricStatement(OALParser.MetricStatementContext ctx);
-       /**
-        * Exit a parse tree produced by {@link OALParser#metricStatement}.
-        * @param ctx the parse tree
-        */
-       void exitMetricStatement(OALParser.MetricStatementContext ctx);
-       /**
-        * Enter a parse tree produced by {@link OALParser#source}.
-        * @param ctx the parse tree
-        */
-       void enterSource(OALParser.SourceContext ctx);
-       /**
-        * Exit a parse tree produced by {@link OALParser#source}.
-        * @param ctx the parse tree
-        */
-       void exitSource(OALParser.SourceContext ctx);
-       /**
-        * Enter a parse tree produced by {@link OALParser#variable}.
-        * @param ctx the parse tree
-        */
-       void enterVariable(OALParser.VariableContext ctx);
-       /**
-        * Exit a parse tree produced by {@link OALParser#variable}.
-        * @param ctx the parse tree
-        */
-       void exitVariable(OALParser.VariableContext ctx);
-       /**
-        * Enter a parse tree produced by {@link OALParser#aggregateFunction}.
-        * @param ctx the parse tree
-        */
-       void enterAggregateFunction(OALParser.AggregateFunctionContext ctx);
-       /**
-        * Exit a parse tree produced by {@link OALParser#aggregateFunction}.
-        * @param ctx the parse tree
-        */
-       void exitAggregateFunction(OALParser.AggregateFunctionContext ctx);
-       /**
-        * Enter a parse tree produced by {@link OALParser#functionName}.
-        * @param ctx the parse tree
-        */
-       void enterFunctionName(OALParser.FunctionNameContext ctx);
-       /**
-        * Exit a parse tree produced by {@link OALParser#functionName}.
-        * @param ctx the parse tree
-        */
-       void exitFunctionName(OALParser.FunctionNameContext ctx);
-       /**
-        * Enter a parse tree produced by {@link OALParser#filterExpression}.
-        * @param ctx the parse tree
-        */
-       void enterFilterExpression(OALParser.FilterExpressionContext ctx);
-       /**
-        * Exit a parse tree produced by {@link OALParser#filterExpression}.
-        * @param ctx the parse tree
-        */
-       void exitFilterExpression(OALParser.FilterExpressionContext ctx);
-}
\ No newline at end of file
diff --git 
a/oal-syntax/target/maven-shared-archive-resources/META-INF/DEPENDENCIES 
b/oal-syntax/target/maven-shared-archive-resources/META-INF/DEPENDENCIES
deleted file mode 100644
index 2764812..0000000
--- a/oal-syntax/target/maven-shared-archive-resources/META-INF/DEPENDENCIES
+++ /dev/null
@@ -1,33 +0,0 @@
-// ------------------------------------------------------------------
-// Transitive dependencies of this project determined from the
-// maven pom organized by organization.
-// ------------------------------------------------------------------
-
-oal-syntax
-
-
-From: 'abego Software GmbH, Germany' (http://abego-software.de)
-  - abego TreeLayout Core (http://treelayout.sourceforge.net) 
org.abego.treelayout:org.abego.treelayout.core:bundle:1.0.3
-    License: BSD 3-Clause "New" or "Revised" License (BSD-3-Clause)  
(http://www.abego-software.de/legal/apl-v10.html)
-
-From: 'an unknown organization'
-  - ICU4J (http://icu-project.org/) com.ibm.icu:icu4j:jar:58.2
-    License: Unicode/ICU License  
(http://source.icu-project.org/repos/icu/trunk/icu4j/main/shared/licenses/LICENSE)
-  - StringTemplate 4 (http://www.stringtemplate.org) org.antlr:ST4:jar:4.0.8
-    License: BSD licence  (http://antlr.org/license.html)
-
-From: 'ANTLR' (http://www.antlr.org)
-  - ANTLR 3 Runtime (http://www.antlr.org) org.antlr:antlr-runtime:jar:3.5.2
-    License: BSD licence  (http://antlr.org/license.html)
-  - ANTLR 4 Tool (http://www.antlr.org) org.antlr:antlr4:jar:4.7.1
-    License: The BSD License  (http://www.antlr.org/license.html)
-  - ANTLR 4 Runtime (http://www.antlr.org/antlr4-runtime) 
org.antlr:antlr4-runtime:jar:4.7.1
-    License: The BSD License  (http://www.antlr.org/license.html)
-
-From: 'Oracle' (http://www.oracle.com)
-  - JSR 353 (JSON Processing) Default Provider (http://jsonp.java.net) 
org.glassfish:javax.json:bundle:1.0.4
-    License: Dual license consisting of the CDDL v1.1 and GPL v2  
(https://glassfish.java.net/public/CDDL+GPL_1_1.html)
-
-
-
-
diff --git a/oal-syntax/target/maven-shared-archive-resources/META-INF/LICENSE 
b/oal-syntax/target/maven-shared-archive-resources/META-INF/LICENSE
deleted file mode 100644
index d645695..0000000
--- a/oal-syntax/target/maven-shared-archive-resources/META-INF/LICENSE
+++ /dev/null
@@ -1,202 +0,0 @@
-
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
-      and distribution as defined by Sections 1 through 9 of this document.
-
-      "Licensor" shall mean the copyright owner or entity authorized by
-      the copyright owner that is granting the License.
-
-      "Legal Entity" shall mean the union of the acting entity and all
-      other entities that control, are controlled by, or are under common
-      control with that entity. For the purposes of this definition,
-      "control" means (i) the power, direct or indirect, to cause the
-      direction or management of such entity, whether by contract or
-      otherwise, or (ii) ownership of fifty percent (50%) or more of the
-      outstanding shares, or (iii) beneficial ownership of such entity.
-
-      "You" (or "Your") shall mean an individual or Legal Entity
-      exercising permissions granted by this License.
-
-      "Source" form shall mean the preferred form for making modifications,
-      including but not limited to software source code, documentation
-      source, and configuration files.
-
-      "Object" form shall mean any form resulting from mechanical
-      transformation or translation of a Source form, including but
-      not limited to compiled object code, generated documentation,
-      and conversions to other media types.
-
-      "Work" shall mean the work of authorship, whether in Source or
-      Object form, made available under the License, as indicated by a
-      copyright notice that is included in or attached to the work
-      (an example is provided in the Appendix below).
-
-      "Derivative Works" shall mean any work, whether in Source or Object
-      form, that is based on (or derived from) the Work and for which the
-      editorial revisions, annotations, elaborations, or other modifications
-      represent, as a whole, an original work of authorship. For the purposes
-      of this License, Derivative Works shall not include works that remain
-      separable from, or merely link (or bind by name) to the interfaces of,
-      the Work and Derivative Works thereof.
-
-      "Contribution" shall mean any work of authorship, including
-      the original version of the Work and any modifications or additions
-      to that Work or Derivative Works thereof, that is intentionally
-      submitted to Licensor for inclusion in the Work by the copyright owner
-      or by an individual or Legal Entity authorized to submit on behalf of
-      the copyright owner. For the purposes of this definition, "submitted"
-      means any form of electronic, verbal, or written communication sent
-      to the Licensor or its representatives, including but not limited to
-      communication on electronic mailing lists, source code control systems,
-      and issue tracking systems that are managed by, or on behalf of, the
-      Licensor for the purpose of discussing and improving the Work, but
-      excluding communication that is conspicuously marked or otherwise
-      designated in writing by the copyright owner as "Not a Contribution."
-
-      "Contributor" shall mean Licensor and any individual or Legal Entity
-      on behalf of whom a Contribution has been received by Licensor and
-      subsequently incorporated within the Work.
-
-   2. Grant of Copyright License. Subject to the terms and conditions of
-      this License, each Contributor hereby grants to You a perpetual,
-      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
-      copyright license to reproduce, prepare Derivative Works of,
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-      Work and such Derivative Works in Source or Object form.
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-   3. Grant of Patent License. Subject to the terms and conditions of
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-      or a Contribution incorporated within the Work constitutes direct
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-      as of the date such litigation is filed.
-
-   4. Redistribution. You may reproduce and distribute copies of the
-      Work or Derivative Works thereof in any medium, with or without
-      modifications, and in Source or Object form, provided that You
-      meet the following conditions:
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-      (a) You must give any other recipients of the Work or
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-      (b) You must cause any modified files to carry prominent notices
-          stating that You changed the files; and
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-      (c) You must retain, in the Source form of any Derivative Works
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-          distribution, then any Derivative Works that You distribute must
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-          within a display generated by the Derivative Works, if and
-          wherever such third-party notices normally appear. The contents
-          of the NOTICE file are for informational purposes only and
-          do not modify the License. You may add Your own attribution
-          notices within Derivative Works that You distribute, alongside
-          or as an addendum to the NOTICE text from the Work, provided
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-
-      You may add Your own copyright statement to Your modifications and
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-      for use, reproduction, or distribution of Your modifications, or
-      for any such Derivative Works as a whole, provided Your use,
-      reproduction, and distribution of the Work otherwise complies with
-      the conditions stated in this License.
-
-   5. Submission of Contributions. Unless You explicitly state otherwise,
-      any Contribution intentionally submitted for inclusion in the Work
-      by You to the Licensor shall be under the terms and conditions of
-      this License, without any additional terms or conditions.
-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
-      with Licensor regarding such Contributions.
-
-   6. Trademarks. This License does not grant permission to use the trade
-      names, trademarks, service marks, or product names of the Licensor,
-      except as required for reasonable and customary use in describing the
-      origin of the Work and reproducing the content of the NOTICE file.
-
-   7. Disclaimer of Warranty. Unless required by applicable law or
-      agreed to in writing, Licensor provides the Work (and each
-      Contributor provides its Contributions) on an "AS IS" BASIS,
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-      PARTICULAR PURPOSE. You are solely responsible for determining the
-      appropriateness of using or redistributing the Work and assume any
-      risks associated with Your exercise of permissions under this License.
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-   8. Limitation of Liability. In no event and under no legal theory,
-      whether in tort (including negligence), contract, or otherwise,
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-      negligent acts) or agreed to in writing, shall any Contributor be
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-      incidental, or consequential damages of any character arising as a
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-      has been advised of the possibility of such damages.
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-   9. Accepting Warranty or Additional Liability. While redistributing
-      the Work or Derivative Works thereof, You may choose to offer,
-      and charge a fee for, acceptance of support, warranty, indemnity,
-      or other liability obligations and/or rights consistent with this
-      License. However, in accepting such obligations, You may act only
-      on Your own behalf and on Your sole responsibility, not on behalf
-      of any other Contributor, and only if You agree to indemnify,
-      defend, and hold each Contributor harmless for any liability
-      incurred by, or claims asserted against, such Contributor by reason
-      of your accepting any such warranty or additional liability.
-
-   END OF TERMS AND CONDITIONS
-
-   APPENDIX: How to apply the Apache License to your work.
-
-      To apply the Apache License to your work, attach the following
-      boilerplate notice, with the fields enclosed by brackets "[]"
-      replaced with your own identifying information. (Don't include
-      the brackets!)  The text should be enclosed in the appropriate
-      comment syntax for the file format. We also recommend that a
-      file or class name and description of purpose be included on the
-      same "printed page" as the copyright notice for easier
-      identification within third-party archives.
-
-   Copyright [yyyy] [name of copyright owner]
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
diff --git a/oal-syntax/target/maven-shared-archive-resources/META-INF/NOTICE 
b/oal-syntax/target/maven-shared-archive-resources/META-INF/NOTICE
deleted file mode 100644
index 82d5ff9..0000000
--- a/oal-syntax/target/maven-shared-archive-resources/META-INF/NOTICE
+++ /dev/null
@@ -1,8 +0,0 @@
-
-oal-syntax
-Copyright 2018 The Apache Software Foundation
-
-This product includes software developed at
-The Apache Software Foundation (http://www.apache.org/).
-
-
diff --git a/oal-syntax/target/maven-status/antlr4/dependencies.ser 
b/oal-syntax/target/maven-status/antlr4/dependencies.ser
deleted file mode 100644
index 4b68ebf..0000000
Binary files a/oal-syntax/target/maven-status/antlr4/dependencies.ser and 
/dev/null differ
diff --git 
a/oal-syntax/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
 
b/oal-syntax/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
deleted file mode 100644
index eef357d..0000000
--- 
a/oal-syntax/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
+++ /dev/null
@@ -1,12 +0,0 @@
-org/apache/skywalking/oal/tool/grammar/OALParser$MetricStatementContext.class
-org/apache/skywalking/oal/tool/grammar/OALParser$AggregateFunctionContext.class
-org/apache/skywalking/oal/tool/grammar/OALParser$VariableContext.class
-org/apache/skywalking/oal/tool/grammar/OALLexer.class
-org/apache/skywalking/oal/tool/grammar/OALParser$AggregationStatementContext.class
-org/apache/skywalking/oal/tool/grammar/OALParser$SourceContext.class
-org/apache/skywalking/oal/tool/grammar/OALParser.class
-org/apache/skywalking/oal/tool/grammar/OALParserListener.class
-org/apache/skywalking/oal/tool/grammar/OALParser$FilterExpressionContext.class
-org/apache/skywalking/oal/tool/grammar/OALParser$FunctionNameContext.class
-org/apache/skywalking/oal/tool/grammar/OALParserBaseListener.class
-org/apache/skywalking/oal/tool/grammar/OALParser$RootContext.class
diff --git 
a/oal-syntax/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
 
b/oal-syntax/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
deleted file mode 100644
index 0273d5e..0000000
--- 
a/oal-syntax/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
+++ /dev/null
@@ -1,4 +0,0 @@
-/Users/wusheng/Documents/GitHub/incubator-skywalking-oal-tool/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParserBaseListener.java
-/Users/wusheng/Documents/GitHub/incubator-skywalking-oal-tool/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParser.java
-/Users/wusheng/Documents/GitHub/incubator-skywalking-oal-tool/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALLexer.java
-/Users/wusheng/Documents/GitHub/incubator-skywalking-oal-tool/oal-syntax/target/generated-sources/antlr4/org/apache/skywalking/oal/tool/grammar/OALParserListener.java
diff --git a/target/.plxarc b/target/.plxarc
deleted file mode 100644
index 67ea6ee..0000000
--- a/target/.plxarc
+++ /dev/null
@@ -1 +0,0 @@
-maven-shared-archive-resources
\ No newline at end of file
diff --git a/target/maven-shared-archive-resources/META-INF/DEPENDENCIES 
b/target/maven-shared-archive-resources/META-INF/DEPENDENCIES
deleted file mode 100644
index ed0b393..0000000
--- a/target/maven-shared-archive-resources/META-INF/DEPENDENCIES
+++ /dev/null
@@ -1,11 +0,0 @@
-// ------------------------------------------------------------------
-// Transitive dependencies of this project determined from the
-// maven pom organized by organization.
-// ------------------------------------------------------------------
-
-oal-tool
-
-
-
-
-
diff --git a/target/maven-shared-archive-resources/META-INF/LICENSE 
b/target/maven-shared-archive-resources/META-INF/LICENSE
deleted file mode 100644
index d645695..0000000
--- a/target/maven-shared-archive-resources/META-INF/LICENSE
+++ /dev/null
@@ -1,202 +0,0 @@
-
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
-      and distribution as defined by Sections 1 through 9 of this document.
-
-      "Licensor" shall mean the copyright owner or entity authorized by
-      the copyright owner that is granting the License.
-
-      "Legal Entity" shall mean the union of the acting entity and all
-      other entities that control, are controlled by, or are under common
-      control with that entity. For the purposes of this definition,
-      "control" means (i) the power, direct or indirect, to cause the
-      direction or management of such entity, whether by contract or
-      otherwise, or (ii) ownership of fifty percent (50%) or more of the
-      outstanding shares, or (iii) beneficial ownership of such entity.
-
-      "You" (or "Your") shall mean an individual or Legal Entity
-      exercising permissions granted by this License.
-
-      "Source" form shall mean the preferred form for making modifications,
-      including but not limited to software source code, documentation
-      source, and configuration files.
-
-      "Object" form shall mean any form resulting from mechanical
-      transformation or translation of a Source form, including but
-      not limited to compiled object code, generated documentation,
-      and conversions to other media types.
-
-      "Work" shall mean the work of authorship, whether in Source or
-      Object form, made available under the License, as indicated by a
-      copyright notice that is included in or attached to the work
-      (an example is provided in the Appendix below).
-
-      "Derivative Works" shall mean any work, whether in Source or Object
-      form, that is based on (or derived from) the Work and for which the
-      editorial revisions, annotations, elaborations, or other modifications
-      represent, as a whole, an original work of authorship. For the purposes
-      of this License, Derivative Works shall not include works that remain
-      separable from, or merely link (or bind by name) to the interfaces of,
-      the Work and Derivative Works thereof.
-
-      "Contribution" shall mean any work of authorship, including
-      the original version of the Work and any modifications or additions
-      to that Work or Derivative Works thereof, that is intentionally
-      submitted to Licensor for inclusion in the Work by the copyright owner
-      or by an individual or Legal Entity authorized to submit on behalf of
-      the copyright owner. For the purposes of this definition, "submitted"
-      means any form of electronic, verbal, or written communication sent
-      to the Licensor or its representatives, including but not limited to
-      communication on electronic mailing lists, source code control systems,
-      and issue tracking systems that are managed by, or on behalf of, the
-      Licensor for the purpose of discussing and improving the Work, but
-      excluding communication that is conspicuously marked or otherwise
-      designated in writing by the copyright owner as "Not a Contribution."
-
-      "Contributor" shall mean Licensor and any individual or Legal Entity
-      on behalf of whom a Contribution has been received by Licensor and
-      subsequently incorporated within the Work.
-
-   2. Grant of Copyright License. Subject to the terms and conditions of
-      this License, each Contributor hereby grants to You a perpetual,
-      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
-      copyright license to reproduce, prepare Derivative Works of,
-      publicly display, publicly perform, sublicense, and distribute the
-      Work and such Derivative Works in Source or Object form.
-
-   3. Grant of Patent License. Subject to the terms and conditions of
-      this License, each Contributor hereby grants to You a perpetual,
-      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
-      (except as stated in this section) patent license to make, have made,
-      use, offer to sell, sell, import, and otherwise transfer the Work,
-      where such license applies only to those patent claims licensable
-      by such Contributor that are necessarily infringed by their
-      Contribution(s) alone or by combination of their Contribution(s)
-      with the Work to which such Contribution(s) was submitted. If You
-      institute patent litigation against any entity (including a
-      cross-claim or counterclaim in a lawsuit) alleging that the Work
-      or a Contribution incorporated within the Work constitutes direct
-      or contributory patent infringement, then any patent licenses
-      granted to You under this License for that Work shall terminate
-      as of the date such litigation is filed.
-
-   4. Redistribution. You may reproduce and distribute copies of the
-      Work or Derivative Works thereof in any medium, with or without
-      modifications, and in Source or Object form, provided that You
-      meet the following conditions:
-
-      (a) You must give any other recipients of the Work or
-          Derivative Works a copy of this License; and
-
-      (b) You must cause any modified files to carry prominent notices
-          stating that You changed the files; and
-
-      (c) You must retain, in the Source form of any Derivative Works
-          that You distribute, all copyright, patent, trademark, and
-          attribution notices from the Source form of the Work,
-          excluding those notices that do not pertain to any part of
-          the Derivative Works; and
-
-      (d) If the Work includes a "NOTICE" text file as part of its
-          distribution, then any Derivative Works that You distribute must
-          include a readable copy of the attribution notices contained
-          within such NOTICE file, excluding those notices that do not
-          pertain to any part of the Derivative Works, in at least one
-          of the following places: within a NOTICE text file distributed
-          as part of the Derivative Works; within the Source form or
-          documentation, if provided along with the Derivative Works; or,
-          within a display generated by the Derivative Works, if and
-          wherever such third-party notices normally appear. The contents
-          of the NOTICE file are for informational purposes only and
-          do not modify the License. You may add Your own attribution
-          notices within Derivative Works that You distribute, alongside
-          or as an addendum to the NOTICE text from the Work, provided
-          that such additional attribution notices cannot be construed
-          as modifying the License.
-
-      You may add Your own copyright statement to Your modifications and
-      may provide additional or different license terms and conditions
-      for use, reproduction, or distribution of Your modifications, or
-      for any such Derivative Works as a whole, provided Your use,
-      reproduction, and distribution of the Work otherwise complies with
-      the conditions stated in this License.
-
-   5. Submission of Contributions. Unless You explicitly state otherwise,
-      any Contribution intentionally submitted for inclusion in the Work
-      by You to the Licensor shall be under the terms and conditions of
-      this License, without any additional terms or conditions.
-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
-      with Licensor regarding such Contributions.
-
-   6. Trademarks. This License does not grant permission to use the trade
-      names, trademarks, service marks, or product names of the Licensor,
-      except as required for reasonable and customary use in describing the
-      origin of the Work and reproducing the content of the NOTICE file.
-
-   7. Disclaimer of Warranty. Unless required by applicable law or
-      agreed to in writing, Licensor provides the Work (and each
-      Contributor provides its Contributions) on an "AS IS" BASIS,
-      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-      implied, including, without limitation, any warranties or conditions
-      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
-      PARTICULAR PURPOSE. You are solely responsible for determining the
-      appropriateness of using or redistributing the Work and assume any
-      risks associated with Your exercise of permissions under this License.
-
-   8. Limitation of Liability. In no event and under no legal theory,
-      whether in tort (including negligence), contract, or otherwise,
-      unless required by applicable law (such as deliberate and grossly
-      negligent acts) or agreed to in writing, shall any Contributor be
-      liable to You for damages, including any direct, indirect, special,
-      incidental, or consequential damages of any character arising as a
-      result of this License or out of the use or inability to use the
-      Work (including but not limited to damages for loss of goodwill,
-      work stoppage, computer failure or malfunction, or any and all
-      other commercial damages or losses), even if such Contributor
-      has been advised of the possibility of such damages.
-
-   9. Accepting Warranty or Additional Liability. While redistributing
-      the Work or Derivative Works thereof, You may choose to offer,
-      and charge a fee for, acceptance of support, warranty, indemnity,
-      or other liability obligations and/or rights consistent with this
-      License. However, in accepting such obligations, You may act only
-      on Your own behalf and on Your sole responsibility, not on behalf
-      of any other Contributor, and only if You agree to indemnify,
-      defend, and hold each Contributor harmless for any liability
-      incurred by, or claims asserted against, such Contributor by reason
-      of your accepting any such warranty or additional liability.
-
-   END OF TERMS AND CONDITIONS
-
-   APPENDIX: How to apply the Apache License to your work.
-
-      To apply the Apache License to your work, attach the following
-      boilerplate notice, with the fields enclosed by brackets "[]"
-      replaced with your own identifying information. (Don't include
-      the brackets!)  The text should be enclosed in the appropriate
-      comment syntax for the file format. We also recommend that a
-      file or class name and description of purpose be included on the
-      same "printed page" as the copyright notice for easier
-      identification within third-party archives.
-
-   Copyright [yyyy] [name of copyright owner]
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
diff --git a/target/maven-shared-archive-resources/META-INF/NOTICE 
b/target/maven-shared-archive-resources/META-INF/NOTICE
deleted file mode 100644
index f854993..0000000
--- a/target/maven-shared-archive-resources/META-INF/NOTICE
+++ /dev/null
@@ -1,8 +0,0 @@
-
-oal-tool
-Copyright 2018 The Apache Software Foundation
-
-This product includes software developed at
-The Apache Software Foundation (http://www.apache.org/).
-
-

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