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https://issues.apache.org/jira/browse/METRON-831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15961905#comment-15961905
]
ASF GitHub Bot commented on METRON-831:
---------------------------------------
Github user cestella commented on a diff in the pull request:
https://github.com/apache/incubator-metron/pull/517#discussion_r110523410
--- Diff:
metron-platform/metron-common/src/main/java/org/apache/metron/common/stellar/LambdaExpression.java
---
@@ -0,0 +1,63 @@
+/*
+ * 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.
+ */
+
+package org.apache.metron.common.stellar;
+
+import org.apache.metron.common.dsl.Token;
+import org.apache.metron.common.dsl.VariableResolver;
+
+import java.util.*;
--- End diff --
agreed
> Add lambda expressions and rudimentary functional programming primitives to
> Stellar
> -----------------------------------------------------------------------------------
>
> Key: METRON-831
> URL: https://issues.apache.org/jira/browse/METRON-831
> Project: Metron
> Issue Type: Improvement
> Reporter: Casey Stella
>
> To enable use-cases where the user may want to do simple iteration, we can
> expose simple functional primitives such as:
> * MAP
> * REDUCE
> * FILTER
> To fully support this, we will need lambda expressions as arguments to these
> functions.
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