Revert "TAJO-1114: Improve ConfVars (SessionVar) to take a validator interface 
to check its input. (Jihun Kang via hyunsik)"

This reverts commit ee89c65b44142ca640020339e7ab5a608c1a8bf9.


Project: http://git-wip-us.apache.org/repos/asf/tajo/repo
Commit: http://git-wip-us.apache.org/repos/asf/tajo/commit/8741e682
Tree: http://git-wip-us.apache.org/repos/asf/tajo/tree/8741e682
Diff: http://git-wip-us.apache.org/repos/asf/tajo/diff/8741e682

Branch: refs/heads/hbase_storage
Commit: 8741e68291cb8dccb64d4c2e0b872cc56a4dbf3f
Parents: 58b8eb4
Author: Hyunsik Choi <[email protected]>
Authored: Mon Oct 27 18:17:04 2014 -0700
Committer: Hyunsik Choi <[email protected]>
Committed: Mon Oct 27 18:17:04 2014 -0700

----------------------------------------------------------------------
 CHANGES                                         |   3 -
 tajo-common/pom.xml                             |   5 -
 .../main/java/org/apache/tajo/ConfigKey.java    |   6 -
 .../main/java/org/apache/tajo/SessionVars.java  |  63 +--
 .../java/org/apache/tajo/conf/TajoConf.java     | 155 ++----
 .../java/org/apache/tajo/util/NumberUtil.java   |  21 -
 .../tajo/validation/AbstractValidator.java      |  60 ---
 .../tajo/validation/BooleanValidator.java       |  57 ---
 .../apache/tajo/validation/ClassValidator.java  |  57 ---
 .../tajo/validation/ConstraintViolation.java    |  47 --
 .../ConstraintViolationException.java           |  56 ---
 .../apache/tajo/validation/GroupValidator.java  |  49 --
 .../tajo/validation/JavaStringValidator.java    |  32 --
 .../apache/tajo/validation/LengthValidator.java |  57 ---
 .../apache/tajo/validation/MaxValidator.java    |  83 ---
 .../apache/tajo/validation/MinValidator.java    |  84 ----
 .../validation/NetworkAddressValidator.java     | 103 ----
 .../tajo/validation/NotNullValidator.java       |  47 --
 .../apache/tajo/validation/PathValidator.java   |  32 --
 .../tajo/validation/PatternValidator.java       |  63 ---
 .../apache/tajo/validation/RangeValidator.java  |  53 --
 .../tajo/validation/ShellVariableValidator.java |  32 --
 .../org/apache/tajo/validation/Validator.java   |  29 --
 .../org/apache/tajo/validation/Validators.java  |  77 ---
 .../apache/tajo/validation/TestValidators.java  | 503 -------------------
 .../apache/tajo/engine/query/QueryContext.java  |  11 -
 26 files changed, 53 insertions(+), 1732 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/CHANGES
----------------------------------------------------------------------
diff --git a/CHANGES b/CHANGES
index 3224a79..d239a19 100644
--- a/CHANGES
+++ b/CHANGES
@@ -11,9 +11,6 @@ Release 0.9.1 - unreleased
 
   IMPROVEMENT
 
-    TAJO-1114: Improve ConfVars (SessionVar) to take a validator interface to 
-    check its input. (Jihun Kang via hyunsik)
-
     TAJO-1132: More detailed version info in tsql. (hyunsik)
 
     TAJO-1125: Separate logical plan and optimizer into a maven module.

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/pom.xml
----------------------------------------------------------------------
diff --git a/tajo-common/pom.xml b/tajo-common/pom.xml
index 820220c..d857e0e 100644
--- a/tajo-common/pom.xml
+++ b/tajo-common/pom.xml
@@ -108,11 +108,6 @@
             </goals>
           </execution>
         </executions>
-        <configuration>
-          <excludes>
-            <exclude>src/test/resources/org/apache/tajo/conf/**</exclude>
-          </excludes>
-        </configuration>
       </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/ConfigKey.java
----------------------------------------------------------------------
diff --git a/tajo-common/src/main/java/org/apache/tajo/ConfigKey.java 
b/tajo-common/src/main/java/org/apache/tajo/ConfigKey.java
index 6329e77..b9d51ec 100644
--- a/tajo-common/src/main/java/org/apache/tajo/ConfigKey.java
+++ b/tajo-common/src/main/java/org/apache/tajo/ConfigKey.java
@@ -18,8 +18,6 @@
 
 package org.apache.tajo;
 
-import org.apache.tajo.validation.Validator;
-
 public interface ConfigKey {
 
   // Client can set or change variables of this mode.
@@ -51,8 +49,4 @@ public interface ConfigKey {
   public String keyname();
 
   public ConfigType type();
-  
-  public Class<?> valueClass();
-  
-  public Validator validator();
 }

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/SessionVars.java
----------------------------------------------------------------------
diff --git a/tajo-common/src/main/java/org/apache/tajo/SessionVars.java 
b/tajo-common/src/main/java/org/apache/tajo/SessionVars.java
index dbe949a..1229849 100644
--- a/tajo-common/src/main/java/org/apache/tajo/SessionVars.java
+++ b/tajo-common/src/main/java/org/apache/tajo/SessionVars.java
@@ -22,9 +22,6 @@ import com.google.common.collect.Maps;
 
 import java.util.Map;
 
-import org.apache.tajo.validation.Validator;
-import org.apache.tajo.validation.Validators;
-
 import static org.apache.tajo.SessionVars.VariableMode.*;
 import static org.apache.tajo.conf.TajoConf.ConfVars;
 
@@ -43,8 +40,8 @@ public enum SessionVars implements ConfigKey {
   
//-------------------------------------------------------------------------------
   // Server Side Only Variables
   
//-------------------------------------------------------------------------------
-  SESSION_ID(ConfVars.$EMPTY, "session variable", SERVER_SIDE_VAR, 
String.class, Validators.notNull()),
-  SESSION_LAST_ACCESS_TIME(ConfVars.$EMPTY, "last access time", 
SERVER_SIDE_VAR, Long.class, Validators.min("0")),
+  SESSION_ID(ConfVars.$EMPTY, "session variable", SERVER_SIDE_VAR),
+  SESSION_LAST_ACCESS_TIME(ConfVars.$EMPTY, "last access time", 
SERVER_SIDE_VAR),
 
   USERNAME(ConfVars.USERNAME, "username", SERVER_SIDE_VAR),
   CLIENT_HOST(ConfVars.$EMPTY, "client hostname", SERVER_SIDE_VAR),
@@ -56,8 +53,7 @@ public enum SessionVars implements ConfigKey {
   
//-------------------------------------------------------------------------------
 
   // Client --------------------------------------------------------
-  SESSION_EXPIRY_TIME(ConfVars.$CLIENT_SESSION_EXPIRY_TIME, "session expiry 
time (secs)", DEFAULT,
-      Integer.class, Validators.min("0")),
+  SESSION_EXPIRY_TIME(ConfVars.$CLIENT_SESSION_EXPIRY_TIME, "session expiry 
time (secs)", DEFAULT),
 
   // Command line interface and its behavior --------------------------------
   CLI_COLUMNS(ConfVars.$CLI_MAX_COLUMN, "Sets the width for the wrapped 
format", CLI_SIDE_VAR),
@@ -91,36 +87,29 @@ public enum SessionVars implements ConfigKey {
 
   // for distributed query strategies
   BROADCAST_TABLE_SIZE_LIMIT(ConfVars.$DIST_QUERY_BROADCAST_JOIN_THRESHOLD, 
"limited size (bytes) of broadcast table",
-      DEFAULT, Long.class, Validators.min("0")),
+      DEFAULT),
 
-  JOIN_TASK_INPUT_SIZE(ConfVars.$DIST_QUERY_JOIN_TASK_VOLUME, "join task input 
size (mb) ", DEFAULT,
-      Integer.class, Validators.min("1")),
+  JOIN_TASK_INPUT_SIZE(ConfVars.$DIST_QUERY_JOIN_TASK_VOLUME, "join task input 
size (mb) ", DEFAULT),
   SORT_TASK_INPUT_SIZE(ConfVars.$DIST_QUERY_SORT_TASK_VOLUME, "sort task input 
size (mb)", DEFAULT),
   GROUPBY_TASK_INPUT_SIZE(ConfVars.$DIST_QUERY_GROUPBY_TASK_VOLUME, "group by 
task input size (mb)", DEFAULT),
 
-  JOIN_PER_SHUFFLE_SIZE(ConfVars.$DIST_QUERY_JOIN_PARTITION_VOLUME, "shuffle 
output size for join (mb)", DEFAULT,
-      Integer.class, Validators.min("1")),
-  GROUPBY_PER_SHUFFLE_SIZE(ConfVars.$DIST_QUERY_GROUPBY_PARTITION_VOLUME, 
"shuffle output size for sort (mb)", DEFAULT,
-      Integer.class, Validators.min("1")),
+  JOIN_PER_SHUFFLE_SIZE(ConfVars.$DIST_QUERY_JOIN_PARTITION_VOLUME, "shuffle 
output size for join (mb)", DEFAULT),
+  GROUPBY_PER_SHUFFLE_SIZE(ConfVars.$DIST_QUERY_GROUPBY_PARTITION_VOLUME, 
"shuffle output size for sort (mb)", DEFAULT),
   TABLE_PARTITION_PER_SHUFFLE_SIZE(ConfVars.$DIST_QUERY_TABLE_PARTITION_VOLUME,
-      "shuffle output size for partition table write (mb)", DEFAULT, 
Long.class, Validators.min("1")),
+      "shuffle output size for partition table write (mb)", DEFAULT),
 
-  GROUPBY_MULTI_LEVEL_ENABLED(ConfVars.$GROUPBY_MULTI_LEVEL_ENABLED, "Multiple 
level groupby enabled", DEFAULT,
-      Boolean.class, Validators.bool()),
+  GROUPBY_MULTI_LEVEL_ENABLED(ConfVars.$GROUPBY_MULTI_LEVEL_ENABLED, "Multiple 
level groupby enabled", DEFAULT),
 
   // for physical Executors
-  EXTSORT_BUFFER_SIZE(ConfVars.$EXECUTOR_EXTERNAL_SORT_BUFFER_SIZE, "sort 
buffer size for external sort (mb)", DEFAULT,
-      Long.class, Validators.min("0")),
-  HASH_JOIN_SIZE_LIMIT(ConfVars.$EXECUTOR_HASH_JOIN_SIZE_THRESHOLD, "limited 
size for hash join (mb)", DEFAULT,
-      Long.class, Validators.min("0")),
+  EXTSORT_BUFFER_SIZE(ConfVars.$EXECUTOR_EXTERNAL_SORT_BUFFER_SIZE, "sort 
buffer size for external sort (mb)", DEFAULT),
+  HASH_JOIN_SIZE_LIMIT(ConfVars.$EXECUTOR_HASH_JOIN_SIZE_THRESHOLD, "limited 
size for hash join (mb)", DEFAULT),
   INNER_HASH_JOIN_SIZE_LIMIT(ConfVars.$EXECUTOR_INNER_HASH_JOIN_SIZE_THRESHOLD,
-      "limited size for hash inner join (mb)", DEFAULT, Long.class, 
Validators.min("0")),
+      "limited size for hash inner join (mb)", DEFAULT),
   
OUTER_HASH_JOIN_SIZE_LIMIT(ConfVars.$EXECUTOR_OUTER_HASH_JOIN_SIZE_THRESHOLD, 
"limited size for hash outer join (mb)",
-      DEFAULT, Long.class, Validators.min("0")),
+      DEFAULT),
   HASH_GROUPBY_SIZE_LIMIT(ConfVars.$EXECUTOR_GROUPBY_INMEMORY_HASH_THRESHOLD, 
"limited size for hash groupby (mb)",
-      DEFAULT, Long.class, Validators.min("0")),
-  MAX_OUTPUT_FILE_SIZE(ConfVars.$MAX_OUTPUT_FILE_SIZE, "Maximum per-output 
file size (mb). 0 means infinite.", DEFAULT,
-      Long.class, Validators.min("0")),
+      DEFAULT),
+  MAX_OUTPUT_FILE_SIZE(ConfVars.$MAX_OUTPUT_FILE_SIZE, "Maximum per-output 
file size (mb). 0 means infinite.", DEFAULT),
   NULL_CHAR(ConfVars.$CSVFILE_NULL, "null char of text file output", DEFAULT),
   CODEGEN(ConfVars.$CODEGEN, "Runtime code generation enabled (experiment)", 
DEFAULT),
 
@@ -129,8 +118,7 @@ public enum SessionVars implements ConfigKey {
       "If true, a running query will be terminated when an overflow or 
divide-by-zero occurs.", DEFAULT),
 
   // ResultSet ----------------------------------------------------------------
-  FETCH_ROWNUM(ConfVars.$RESULT_SET_FETCH_ROWNUM, "Sets the number of rows at 
a time from Master", DEFAULT,
-      Integer.class, Validators.min("0")),
+  FETCH_ROWNUM(ConfVars.$RESULT_SET_FETCH_ROWNUM, "Sets the number of rows at 
a time from Master", DEFAULT),
 
   
//-------------------------------------------------------------------------------
   // Only for Unit Testing
@@ -155,9 +143,6 @@ public enum SessionVars implements ConfigKey {
   private final ConfVars key;
   private final String description;
   private final VariableMode mode;
-  
-  private Class<?> valClass;
-  private Validator validator;
 
   public static enum VariableMode {
     DEFAULT,         // Client can set or change variables of this mode..
@@ -172,12 +157,6 @@ public enum SessionVars implements ConfigKey {
     this.description = description;
     this.mode = mode;
   }
-  
-  SessionVars(ConfVars key, String description, VariableMode mode, Class<?> 
valueClass, Validator validator) {
-    this(key, description, mode);
-    this.valClass = valueClass;
-    this.validator = validator;
-  }
 
   public String keyname() {
     return name();
@@ -234,14 +213,4 @@ public enum SessionVars implements ConfigKey {
   public static String handleDeprecatedName(String keyname) {
     return SessionVars.exists(keyname) ? SessionVars.get(keyname).keyname() : 
keyname;
   }
-
-  @Override
-  public Class<?> valueClass() {
-    return valClass;
-  }
-
-  @Override
-  public Validator validator() {
-    return validator;
-  }
 }

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/conf/TajoConf.java
----------------------------------------------------------------------
diff --git a/tajo-common/src/main/java/org/apache/tajo/conf/TajoConf.java 
b/tajo-common/src/main/java/org/apache/tajo/conf/TajoConf.java
index 86f934e..181ef2e 100644
--- a/tajo-common/src/main/java/org/apache/tajo/conf/TajoConf.java
+++ b/tajo-common/src/main/java/org/apache/tajo/conf/TajoConf.java
@@ -19,20 +19,14 @@
 package org.apache.tajo.conf;
 
 import com.google.common.base.Preconditions;
-
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.tajo.ConfigKey;
-import org.apache.tajo.SessionVars;
 import org.apache.tajo.TajoConstants;
 import org.apache.tajo.util.NetUtils;
-import org.apache.tajo.util.NumberUtil;
 import org.apache.tajo.util.TUtil;
 import org.apache.tajo.util.datetime.DateTimeConstants;
-import org.apache.tajo.validation.ConstraintViolationException;
-import org.apache.tajo.validation.Validator;
-import org.apache.tajo.validation.Validators;
 
 import java.io.IOException;
 import java.io.PrintStream;
@@ -49,8 +43,6 @@ public class TajoConf extends Configuration {
   private static final ReentrantReadWriteLock confLock = new 
ReentrantReadWriteLock();
   private static final Lock writeLock = confLock.writeLock();
   private static final Lock readLock = confLock.readLock();
-  
-  private static final Map<String, ConfVars> vars = TUtil.newHashMap();
 
   static {
     Configuration.addDefaultResource("catalog-default.xml");
@@ -61,14 +53,12 @@ public class TajoConf extends Configuration {
     Configuration.addDefaultResource("tajo-site.xml");
 
     confStaticInit();
-    
-    for (ConfVars confVars: ConfVars.values()) {
-      vars.put(confVars.keyname(), confVars);
-    }
   }
 
   private static final String EMPTY_VALUE = "";
 
+  private static final Map<String, ConfVars> vars = TUtil.newHashMap();
+
   public TajoConf() {
     super();
   }
@@ -153,61 +143,54 @@ public class TajoConf extends Configuration {
     
///////////////////////////////////////////////////////////////////////////////////////
 
     // a username for a running Tajo cluster
-    ROOT_DIR("tajo.rootdir", "file:///tmp/tajo-${user.name}/", 
-        Validators.groups(Validators.notNull(), Validators.pathUrl())),
-    USERNAME("tajo.username", "${user.name}", 
-        Validators.groups(Validators.notNull(), Validators.javaString())),
+    ROOT_DIR("tajo.rootdir", "file:///tmp/tajo-${user.name}/"),
+    USERNAME("tajo.username", "${user.name}"),
 
     // Configurable System Directories
-    WAREHOUSE_DIR("tajo.warehouse.directory", EMPTY_VALUE, 
Validators.pathUrl()),
-    STAGING_ROOT_DIR("tajo.staging.directory", 
"/tmp/tajo-${user.name}/staging", Validators.pathUrl()),
+    WAREHOUSE_DIR("tajo.warehouse.directory", EMPTY_VALUE),
+    STAGING_ROOT_DIR("tajo.staging.directory", 
"/tmp/tajo-${user.name}/staging"),
 
-    SYSTEM_CONF_PATH("tajo.system-conf.path", EMPTY_VALUE, 
Validators.pathUrl()),
-    SYSTEM_CONF_REPLICA_COUNT("tajo.system-conf.replica-count", 20, 
Validators.min("1")),
+    SYSTEM_CONF_PATH("tajo.system-conf.path", EMPTY_VALUE),
+    SYSTEM_CONF_REPLICA_COUNT("tajo.system-conf.replica-count", 20),
 
     // Tajo Master Service Addresses
-    TAJO_MASTER_UMBILICAL_RPC_ADDRESS("tajo.master.umbilical-rpc.address", 
"localhost:26001",
-        Validators.networkAddr()),
-    TAJO_MASTER_CLIENT_RPC_ADDRESS("tajo.master.client-rpc.address", 
"localhost:26002",
-        Validators.networkAddr()),
-    TAJO_MASTER_INFO_ADDRESS("tajo.master.info-http.address", "0.0.0.0:26080", 
Validators.networkAddr()),
+    TAJO_MASTER_UMBILICAL_RPC_ADDRESS("tajo.master.umbilical-rpc.address", 
"localhost:26001"),
+    TAJO_MASTER_CLIENT_RPC_ADDRESS("tajo.master.client-rpc.address", 
"localhost:26002"),
+    TAJO_MASTER_INFO_ADDRESS("tajo.master.info-http.address", "0.0.0.0:26080"),
 
     // Tajo Master HA Configurations
-    TAJO_MASTER_HA_ENABLE("tajo.master.ha.enable", false, Validators.bool()),
+    TAJO_MASTER_HA_ENABLE("tajo.master.ha.enable", false),
     TAJO_MASTER_HA_MONITOR_INTERVAL("tajo.master.ha.monitor.interval", 5 * 
1000), // 5 sec
 
     // Resource tracker service
-    RESOURCE_TRACKER_RPC_ADDRESS("tajo.resource-tracker.rpc.address", 
"localhost:26003",
-        Validators.networkAddr()),
+    RESOURCE_TRACKER_RPC_ADDRESS("tajo.resource-tracker.rpc.address", 
"localhost:26003"),
     
RESOURCE_TRACKER_HEARTBEAT_TIMEOUT("tajo.resource-tracker.heartbeat.timeout-secs",
 120 * 1000), // seconds
 
     // QueryMaster resource
-    TAJO_QUERYMASTER_DISK_SLOT("tajo.qm.resource.disk.slots", 0.0f, 
Validators.min("0.0f")),
-    TAJO_QUERYMASTER_MEMORY_MB("tajo.qm.resource.memory-mb", 512, 
Validators.min("64")),
+    TAJO_QUERYMASTER_DISK_SLOT("tajo.qm.resource.disk.slots", 0.0f),
+    TAJO_QUERYMASTER_MEMORY_MB("tajo.qm.resource.memory-mb", 512),
 
     // Tajo Worker Service Addresses
-    WORKER_INFO_ADDRESS("tajo.worker.info-http.address", "0.0.0.0:28080", 
Validators.networkAddr()),
-    WORKER_QM_INFO_ADDRESS("tajo.worker.qm-info-http.address", 
"0.0.0.0:28081", Validators.networkAddr()),
-    WORKER_PEER_RPC_ADDRESS("tajo.worker.peer-rpc.address", "0.0.0.0:28091", 
Validators.networkAddr()),
-    WORKER_CLIENT_RPC_ADDRESS("tajo.worker.client-rpc.address", 
"0.0.0.0:28092", Validators.networkAddr()),
-    WORKER_QM_RPC_ADDRESS("tajo.worker.qm-rpc.address", "0.0.0.0:28093", 
Validators.networkAddr()),
+    WORKER_INFO_ADDRESS("tajo.worker.info-http.address", "0.0.0.0:28080"),
+    WORKER_QM_INFO_ADDRESS("tajo.worker.qm-info-http.address", 
"0.0.0.0:28081"),
+    WORKER_PEER_RPC_ADDRESS("tajo.worker.peer-rpc.address", "0.0.0.0:28091"),
+    WORKER_CLIENT_RPC_ADDRESS("tajo.worker.client-rpc.address", 
"0.0.0.0:28092"),
+    WORKER_QM_RPC_ADDRESS("tajo.worker.qm-rpc.address", "0.0.0.0:28093"),
 
     // Tajo Worker Temporal Directories
-    WORKER_TEMPORAL_DIR("tajo.worker.tmpdir.locations", 
"/tmp/tajo-${user.name}/tmpdir", 
-        Validators.pathUrl()),
-    WORKER_TEMPORAL_DIR_CLEANUP("tajo.worker.tmpdir.cleanup-at-startup", 
false, Validators.bool()),
+    WORKER_TEMPORAL_DIR("tajo.worker.tmpdir.locations", 
"/tmp/tajo-${user.name}/tmpdir"),
+    WORKER_TEMPORAL_DIR_CLEANUP("tajo.worker.tmpdir.cleanup-at-startup", 
false),
 
     // Tajo Worker Resources
-    WORKER_RESOURCE_AVAILABLE_CPU_CORES("tajo.worker.resource.cpu-cores", 1, 
Validators.min("1")),
-    WORKER_RESOURCE_AVAILABLE_MEMORY_MB("tajo.worker.resource.memory-mb", 
1024, Validators.min("64")),
+    WORKER_RESOURCE_AVAILABLE_CPU_CORES("tajo.worker.resource.cpu-cores", 1),
+    WORKER_RESOURCE_AVAILABLE_MEMORY_MB("tajo.worker.resource.memory-mb", 
1024),
     WORKER_RESOURCE_AVAILABLE_DISKS("tajo.worker.resource.disks", 1.0f),
     WORKER_EXECUTION_MAX_SLOTS("tajo.worker.parallel-execution.max-num", 2),
-    WORKER_RESOURCE_DFS_DIR_AWARE("tajo.worker.resource.dfs-dir-aware", false, 
Validators.bool()),
+    WORKER_RESOURCE_DFS_DIR_AWARE("tajo.worker.resource.dfs-dir-aware", false),
 
     // Tajo Worker Dedicated Resources
-    WORKER_RESOURCE_DEDICATED("tajo.worker.resource.dedicated", false, 
Validators.bool()),
-    
WORKER_RESOURCE_DEDICATED_MEMORY_RATIO("tajo.worker.resource.dedicated-memory-ratio",
 0.8f, 
-        Validators.range("0.0f", "1.0f")),
+    WORKER_RESOURCE_DEDICATED("tajo.worker.resource.dedicated", false),
+    
WORKER_RESOURCE_DEDICATED_MEMORY_RATIO("tajo.worker.resource.dedicated-memory-ratio",
 0.8f),
 
     // Tajo Worker History
     
WORKER_HISTORY_EXPIRE_PERIOD("tajo.worker.history.expire-interval-minutes", 12 
* 60), // 12 hours
@@ -215,27 +198,26 @@ public class TajoConf extends Configuration {
     WORKER_HEARTBEAT_TIMEOUT("tajo.worker.heartbeat.timeout", 120 * 1000),  // 
120 sec
 
     // Resource Manager
-    RESOURCE_MANAGER_CLASS("tajo.resource.manager", 
"org.apache.tajo.master.rm.TajoWorkerResourceManager",
-        Validators.groups(Validators.notNull(), Validators.clazz())),
+    RESOURCE_MANAGER_CLASS("tajo.resource.manager", 
"org.apache.tajo.master.rm.TajoWorkerResourceManager"),
 
     // Catalog
-    CATALOG_ADDRESS("tajo.catalog.client-rpc.address", "localhost:26005", 
Validators.networkAddr()),
+    CATALOG_ADDRESS("tajo.catalog.client-rpc.address", "localhost:26005"),
 
 
     // for Yarn Resource Manager ----------------------------------------------
 
     /** how many launching TaskRunners in parallel */
-    YARN_RM_QUERY_MASTER_MEMORY_MB("tajo.querymaster.memory-mb", 512, 
Validators.min("64")),
+    YARN_RM_QUERY_MASTER_MEMORY_MB("tajo.querymaster.memory-mb", 512),
     YARN_RM_QUERY_MASTER_DISKS("tajo.yarn-rm.querymaster.disks", 1),
     
YARN_RM_TASKRUNNER_LAUNCH_PARALLEL_NUM("tajo.yarn-rm.parallel-task-runner-launcher-num",
 16),
     YARN_RM_WORKER_NUMBER_PER_NODE("tajo.yarn-rm.max-worker-num-per-node", 8),
 
     // Query Configuration
-    QUERY_SESSION_TIMEOUT("tajo.query.session.timeout-sec", 60, 
Validators.min("0")),
+    QUERY_SESSION_TIMEOUT("tajo.query.session.timeout-sec", 60),
 
     // Shuffle Configuration --------------------------------------------------
-    PULLSERVER_PORT("tajo.pullserver.port", 0, Validators.range("0", "65535")),
-    SHUFFLE_SSL_ENABLED_KEY("tajo.pullserver.ssl.enabled", false, 
Validators.bool()),
+    PULLSERVER_PORT("tajo.pullserver.port", 0),
+    SHUFFLE_SSL_ENABLED_KEY("tajo.pullserver.ssl.enabled", false),
     SHUFFLE_FILE_FORMAT("tajo.shuffle.file-format", "RAW"),
     
SHUFFLE_FETCHER_PARALLEL_EXECUTION_MAX_NUM("tajo.shuffle.fetcher.parallel-execution.max-num",
 2),
     SHUFFLE_FETCHER_CHUNK_MAX_SIZE("tajo.shuffle.fetcher.chunk.max-size",  
8192),
@@ -249,7 +231,7 @@ public class TajoConf extends Configuration {
     ROWFILE_SYNC_INTERVAL("rowfile.sync.interval", 100),
     MINIMUM_SPLIT_SIZE("tajo.min.split.size", (long) 1),
     // for RCFile
-    HIVEUSEEXPLICITRCFILEHEADER("tajo.exec.rcfile.use.explicit.header", true, 
Validators.bool()),
+    HIVEUSEEXPLICITRCFILEHEADER("tajo.exec.rcfile.use.explicit.header", true),
 
     // RPC --------------------------------------------------------------------
     RPC_POOL_MAX_IDLE("tajo.rpc.pool.idle.max", 10),
@@ -323,9 +305,9 @@ public class TajoConf extends Configuration {
     $DIST_QUERY_SORT_TASK_VOLUME("tajo.dist-query.sort.task-volume-mb", 128),
     $DIST_QUERY_GROUPBY_TASK_VOLUME("tajo.dist-query.groupby.task-volume-mb", 
128),
 
-    
$DIST_QUERY_JOIN_PARTITION_VOLUME("tajo.dist-query.join.partition-volume-mb", 
128, Validators.min("1")),
-    
$DIST_QUERY_GROUPBY_PARTITION_VOLUME("tajo.dist-query.groupby.partition-volume-mb",
 256, Validators.min("1")),
-    
$DIST_QUERY_TABLE_PARTITION_VOLUME("tajo.dist-query.table-partition.task-volume-mb",
 256, Validators.min("1")),
+    
$DIST_QUERY_JOIN_PARTITION_VOLUME("tajo.dist-query.join.partition-volume-mb", 
128),
+    
$DIST_QUERY_GROUPBY_PARTITION_VOLUME("tajo.dist-query.groupby.partition-volume-mb",
 256),
+    
$DIST_QUERY_TABLE_PARTITION_VOLUME("tajo.dist-query.table-partition.task-volume-mb",
 256),
 
     $GROUPBY_MULTI_LEVEL_ENABLED("tajo.dist-query.groupby.multi-level-aggr", 
true),
 
@@ -384,7 +366,6 @@ public class TajoConf extends Configuration {
     public final boolean defaultBoolVal;
 
     private final VarType type;
-    private Validator validator;
 
     ConfVars(String varname, String defaultVal) {
       this.varname = varname;
@@ -396,11 +377,6 @@ public class TajoConf extends Configuration {
       this.defaultBoolVal = false;
       this.type = VarType.STRING;
     }
-    
-    ConfVars(String varname, String defaultVal, Validator validator) {
-      this(varname, defaultVal);
-      this.validator = validator;
-    }
 
     ConfVars(String varname, int defaultIntVal) {
       this.varname = varname;
@@ -412,11 +388,6 @@ public class TajoConf extends Configuration {
       this.defaultBoolVal = false;
       this.type = VarType.INT;
     }
-    
-    ConfVars(String varname, int defaultIntVal, Validator validator) {
-      this(varname, defaultIntVal);
-      this.validator = validator;
-    }
 
     ConfVars(String varname, long defaultLongVal) {
       this.varname = varname;
@@ -428,11 +399,6 @@ public class TajoConf extends Configuration {
       this.defaultBoolVal = false;
       this.type = VarType.LONG;
     }
-    
-    ConfVars(String varname, long defaultLongVal, Validator validator) {
-      this(varname, defaultLongVal);
-      this.validator = validator;
-    }
 
     ConfVars(String varname, float defaultFloatVal) {
       this.varname = varname;
@@ -444,11 +410,6 @@ public class TajoConf extends Configuration {
       this.defaultBoolVal = false;
       this.type = VarType.FLOAT;
     }
-    
-    ConfVars(String varname, float defaultFloatVal, Validator validator) {
-      this(varname, defaultFloatVal);
-      this.validator = validator;
-    }
 
     ConfVars(String varname, boolean defaultBoolVal) {
       this.varname = varname;
@@ -460,11 +421,6 @@ public class TajoConf extends Configuration {
       this.defaultBoolVal = defaultBoolVal;
       this.type = VarType.BOOLEAN;
     }
-    
-    ConfVars(String varname, boolean defaultBoolVal, Validator validator) {
-      this(varname, defaultBoolVal);
-      this.validator = validator;
-    }
 
     enum VarType {
       STRING { void checkType(String value) throws Exception { } },
@@ -490,16 +446,6 @@ public class TajoConf extends Configuration {
     public ConfigType type() {
       return ConfigType.SYSTEM;
     }
-
-    @Override
-    public Class<?> valueClass() {
-      return valClass;
-    }
-
-    @Override
-    public Validator validator() {
-      return validator;
-    }
   }
 
   public static int getIntVar(Configuration conf, ConfVars var) {
@@ -689,31 +635,4 @@ public class TajoConf extends Configuration {
       return new Path(systemConfPathStr);
     }
   }
-  
-  /**
-   * validateProperty function will fetch pre-defined configuration property 
by keyname.
-   * If found, it will validate the supplied value with these validators.
-   * 
-   * @param name - a string containing specific key
-   * @param value - a string containing value
-   * @throws ConstraintViolationException
-   */
-  public void validateProperty(String name, String value) throws 
ConstraintViolationException {
-    ConfigKey configKey = null;
-    configKey = TajoConf.getConfVars(name);
-    if (configKey == null) {
-      configKey = SessionVars.get(name);
-    }
-    if (configKey != null && configKey.validator() != null && 
configKey.valueClass() != null) {
-      Object valueObj = value;
-      if (Number.class.isAssignableFrom(configKey.valueClass())) {
-        valueObj = NumberUtil.numberValue(configKey.valueClass(), value);
-        if (valueObj == null) {
-          return;
-        }
-      }
-      configKey.validator().validate(valueObj, true);
-    }
-  }
-
 }

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/util/NumberUtil.java
----------------------------------------------------------------------
diff --git a/tajo-common/src/main/java/org/apache/tajo/util/NumberUtil.java 
b/tajo-common/src/main/java/org/apache/tajo/util/NumberUtil.java
index 375a2e4..d52b804 100644
--- a/tajo-common/src/main/java/org/apache/tajo/util/NumberUtil.java
+++ b/tajo-common/src/main/java/org/apache/tajo/util/NumberUtil.java
@@ -18,9 +18,6 @@
 
 package org.apache.tajo.util;
 
-import java.lang.reflect.Constructor;
-import java.lang.reflect.InvocationTargetException;
-
 public class NumberUtil {
 
   public static final double[] powersOf10 = {  /* Table giving binary powers 
of 10.  Entry */
@@ -411,22 +408,4 @@ public class NumberUtil {
     }
     return result;
   }
-  
-  public static Number numberValue(Class<?> numberClazz, String value) {
-    Number returnNumber = null;
-    
-    if (numberClazz == null && value == null) {
-      return returnNumber;
-    }
-    
-    if (Number.class.isAssignableFrom(numberClazz)) {
-      try {
-        Constructor<?> constructor = numberClazz.getConstructor(String.class);
-        returnNumber = (Number) constructor.newInstance(value);
-      } catch (Exception ignored) {   
-      }
-    }
-    
-    return returnNumber;
-  }
 }

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/AbstractValidator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/AbstractValidator.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/AbstractValidator.java
deleted file mode 100644
index 0f7082b..0000000
--- 
a/tajo-common/src/main/java/org/apache/tajo/validation/AbstractValidator.java
+++ /dev/null
@@ -1,60 +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.
- */
-
-package org.apache.tajo.validation;
-
-import java.util.Collection;
-
-import org.apache.tajo.util.TUtil;
-
-public abstract class AbstractValidator implements Validator {
-  
-  protected abstract <T> String getErrorMessage(T object);
-  protected abstract <T> boolean validateInternal(T object);
-  protected abstract Collection<Validator> getDependantValidators();
-
-  @Override
-  public <T> Collection<ConstraintViolation> validate(T object) {
-    Collection<ConstraintViolation> violations = TUtil.newHashSet();
-    
-    if (!validateInternal(object)) {
-      ConstraintViolation violation = new ConstraintViolation();
-      violation.setMessage(getErrorMessage(object));
-      violation.setValidatorClazz(this.getClass());
-      violations.add(violation);
-    }
-      
-    for (Validator dependantValidator: getDependantValidators()) {
-      violations.addAll(dependantValidator.validate(object));
-    }
-    
-    return violations;
-  }
-  
-  @Override
-  public <T> void validate(T object, boolean generateThrow) {
-    Collection<ConstraintViolation> violations = validate(object);
-    
-    if (violations.size() > 0) {
-      if (generateThrow) {
-        throw new ConstraintViolationException(violations);
-      }
-    }
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/BooleanValidator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/BooleanValidator.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/BooleanValidator.java
deleted file mode 100644
index b72a5fd..0000000
--- a/tajo-common/src/main/java/org/apache/tajo/validation/BooleanValidator.java
+++ /dev/null
@@ -1,57 +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.
- */
-
-package org.apache.tajo.validation;
-
-import java.util.Collection;
-import java.util.Collections;
-
-public class BooleanValidator extends AbstractValidator {
-
-  @Override
-  protected <T> String getErrorMessage(T object) {
-    return object + " is not a valid boolean representation.";
-  }
-
-  @Override
-  protected <T> boolean validateInternal(T object) {
-    boolean result = false;
-    
-    if (object != null) {
-      if (object instanceof Boolean) {
-        result = true;
-      } else if (object instanceof CharSequence) {
-        String valueString = object.toString();
-        if (Boolean.FALSE.toString().equalsIgnoreCase(valueString) || 
-            Boolean.TRUE.toString().equalsIgnoreCase(valueString)) {
-          result = true;
-        }
-      }
-    } else {
-      result = true;
-    }
-    
-    return result;
-  }
-
-  @Override
-  protected Collection<Validator> getDependantValidators() {
-    return Collections.emptySet();
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/ClassValidator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/ClassValidator.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/ClassValidator.java
deleted file mode 100644
index 1b35e6d..0000000
--- a/tajo-common/src/main/java/org/apache/tajo/validation/ClassValidator.java
+++ /dev/null
@@ -1,57 +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.
- */
-
-package org.apache.tajo.validation;
-
-import java.util.Collection;
-import java.util.Collections;
-
-public class ClassValidator extends AbstractValidator {
-
-  @Override
-  protected <T> String getErrorMessage(T object) {
-    return "ClassLoader cannot find " + object + " class.";
-  }
-
-  @Override
-  protected <T> boolean validateInternal(T object) {
-    boolean result = false;
-    
-    if (object != null) {
-      if (object instanceof CharSequence) {
-        String valueString = object.toString();
-        try {
-          Class.forName(valueString);
-          result = true;
-        } catch (ClassNotFoundException e) {
-          result = false;
-        }
-      }
-    } else {
-      result = true;
-    }
-    
-    return result;
-  }
-
-  @Override
-  protected Collection<Validator> getDependantValidators() {
-    return Collections.emptySet();
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/ConstraintViolation.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/ConstraintViolation.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/ConstraintViolation.java
deleted file mode 100644
index 8d84aa7..0000000
--- 
a/tajo-common/src/main/java/org/apache/tajo/validation/ConstraintViolation.java
+++ /dev/null
@@ -1,47 +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.
- */
-
-package org.apache.tajo.validation;
-
-public class ConstraintViolation {
-
-  private String message;
-  private Class<? extends Validator> validatorClazz;
-
-  public String getMessage() {
-    return message;
-  }
-
-  public void setMessage(String message) {
-    this.message = message;
-  }
-
-  public Class<? extends Validator> getValidatorClazz() {
-    return validatorClazz;
-  }
-
-  public void setValidatorClazz(Class<? extends Validator> validatorClazz) {
-    this.validatorClazz = validatorClazz;
-  }
-
-  @Override
-  public String toString() {
-    return "ConstraintViolation [message=" + message + ", validatorClazz=" + 
validatorClazz + "]";
-  }
-  
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/ConstraintViolationException.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/ConstraintViolationException.java
 
b/tajo-common/src/main/java/org/apache/tajo/validation/ConstraintViolationException.java
deleted file mode 100644
index 8fda81e..0000000
--- 
a/tajo-common/src/main/java/org/apache/tajo/validation/ConstraintViolationException.java
+++ /dev/null
@@ -1,56 +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.
- */
-
-package org.apache.tajo.validation;
-
-import java.util.Collection;
-
-public class ConstraintViolationException extends RuntimeException {
-  
-  private static final long serialVersionUID = 1L;
-  
-  private final Collection<ConstraintViolation> violations;
-
-  public ConstraintViolationException(Collection<ConstraintViolation> 
violations) {
-    this.violations = violations;
-  }
-
-  public Collection<ConstraintViolation> getViolations() {
-    return violations;
-  }
-
-  @Override
-  public String getMessage() {
-    if (violations != null) {
-      String errorMessage = "ConstraintViolationException [";
-      int elemIdx = 1;
-      int elemCount = violations.size();
-      for (ConstraintViolation violation: violations) {
-        errorMessage += violation.getMessage();
-        if (elemIdx++ > elemCount) {
-          errorMessage += ",";
-        }
-      }
-      errorMessage += "]";
-      return errorMessage;
-    } else {
-      return super.getMessage();
-    }
-  }
-  
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/GroupValidator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/GroupValidator.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/GroupValidator.java
deleted file mode 100644
index db2ba51..0000000
--- a/tajo-common/src/main/java/org/apache/tajo/validation/GroupValidator.java
+++ /dev/null
@@ -1,49 +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.
- */
-
-package org.apache.tajo.validation;
-
-import java.util.Collection;
-
-public class GroupValidator extends AbstractValidator {
-  
-  private final Collection<Validator> dependants;
-  
-  public GroupValidator(Collection<Validator> validators) {
-    if (validators.size() == 0) {
-      throw new IllegalArgumentException("Needs at least 1 or more 
validators.");
-    }
-    this.dependants = validators;
-  }
-
-  @Override
-  protected <T> String getErrorMessage(T object) {
-    return "";
-  }
-
-  @Override
-  protected <T> boolean validateInternal(T object) {
-    return true;
-  }
-
-  @Override
-  protected Collection<Validator> getDependantValidators() {
-    return dependants;
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/JavaStringValidator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/JavaStringValidator.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/JavaStringValidator.java
deleted file mode 100644
index a8b1806..0000000
--- 
a/tajo-common/src/main/java/org/apache/tajo/validation/JavaStringValidator.java
+++ /dev/null
@@ -1,32 +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.
- */
-
-package org.apache.tajo.validation;
-
-public class JavaStringValidator extends PatternValidator {
-
-  public JavaStringValidator() {
-    super("^(?sU:\\p{Graph})+$");
-  }
-  
-  @Override
-  protected <T> String getErrorMessage(T object) {
-    return object + " is not a valid string";
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/LengthValidator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/LengthValidator.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/LengthValidator.java
deleted file mode 100644
index e53634b..0000000
--- a/tajo-common/src/main/java/org/apache/tajo/validation/LengthValidator.java
+++ /dev/null
@@ -1,57 +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.
- */
-
-package org.apache.tajo.validation;
-
-import java.util.Collection;
-import java.util.Collections;
-
-public class LengthValidator extends AbstractValidator {
-  
-  private final int maxLength;
-  
-  public LengthValidator(int maxLen) {
-    this.maxLength = maxLen;
-  }
-
-  @Override
-  protected <T> String getErrorMessage(T object) {
-    return "Length of " + object + " is greater than " + maxLength;
-  }
-
-  @Override
-  protected <T> boolean validateInternal(T object) {
-    boolean result = false;
-    
-    if (object != null) {
-      if (object instanceof CharSequence) {
-        result = ((CharSequence)object).length() <= maxLength;
-      }
-    } else {
-      result = true;
-    }
-    
-    return result;
-  }
-
-  @Override
-  protected Collection<Validator> getDependantValidators() {
-    return Collections.emptySet();
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/MaxValidator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/MaxValidator.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/MaxValidator.java
deleted file mode 100644
index 300c5ea..0000000
--- a/tajo-common/src/main/java/org/apache/tajo/validation/MaxValidator.java
+++ /dev/null
@@ -1,83 +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.
- */
-
-package org.apache.tajo.validation;
-
-import java.math.BigDecimal;
-import java.math.BigInteger;
-import java.util.Collection;
-import java.util.Collections;
-
-import org.apache.commons.lang.math.NumberUtils;
-
-public class MaxValidator extends AbstractValidator {
-  
-  private final String maxValue;
-  
-  public MaxValidator(String maxValue) {
-    if (!NumberUtils.isNumber(maxValue)) {
-      throw new IllegalArgumentException(maxValue + " is not a Java number.");
-    }
-    
-    this.maxValue = maxValue;
-  }
-
-  @Override
-  protected <T> String getErrorMessage(T object) {
-    return object + " should be less than " + maxValue;
-  }
-
-  @Override
-  protected <T> boolean validateInternal(T object) {
-    boolean result = false;
-    
-    if (object != null) {
-      if ((object instanceof Byte) || (object instanceof Short) || (object 
instanceof Integer)) {
-        Integer objInteger = Integer.decode(object.toString());
-        Integer maxInteger = Integer.decode(maxValue);
-        result = objInteger.compareTo(maxInteger) <= 0;
-      } else if (object instanceof Long) {
-        Long objLong = Long.decode(object.toString());
-        Long maxLong = Long.decode(maxValue);
-        result = objLong.compareTo(maxLong) <= 0;
-      } else if ((object instanceof Float) || (object instanceof Double)) {
-        Double objDouble = Double.valueOf(object.toString());
-        Double maxDouble = Double.valueOf(maxValue);
-        result = objDouble.compareTo(maxDouble) <= 0;
-      } else if (object instanceof BigInteger) {
-        BigInteger objInteger = (BigInteger) object;
-        BigInteger maxInteger = new BigInteger(maxValue);
-        result = objInteger.compareTo(maxInteger) <= 0;
-      } else if (object instanceof BigDecimal) {
-        BigDecimal objDecimal = (BigDecimal) object;
-        BigDecimal maxDecimal = new BigDecimal(maxValue);
-        result = objDecimal.compareTo(maxDecimal) <= 0;
-      }
-    } else {
-      result = true;
-    }
-    
-    return result;
-  }
-
-  @Override
-  protected Collection<Validator> getDependantValidators() {
-    return Collections.emptySet();
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/MinValidator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/MinValidator.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/MinValidator.java
deleted file mode 100644
index 431fe9b..0000000
--- a/tajo-common/src/main/java/org/apache/tajo/validation/MinValidator.java
+++ /dev/null
@@ -1,84 +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.
- */
-
-package org.apache.tajo.validation;
-
-import java.math.BigDecimal;
-import java.math.BigInteger;
-import java.util.Collection;
-import java.util.Collections;
-
-import org.apache.commons.lang.math.NumberUtils;
-
-public class MinValidator extends AbstractValidator {
-  
-  private final String minValue;
-  
-  public MinValidator(String minValue) {
-    if (!NumberUtils.isNumber(minValue)) {
-      throw new IllegalArgumentException(minValue + " is not a Java Number.");
-    }
-    
-    this.minValue = minValue;
-  }
-
-  @Override
-  protected <T> String getErrorMessage(T object) {
-    return object + " should be greater than " + minValue;
-  }
-
-  @Override
-  protected <T> boolean validateInternal(T object) {
-    boolean result = false;
-    
-    if (object != null) {
-      if ((object instanceof Byte) || (object instanceof Short) || (object 
instanceof Integer)) {
-        Integer objInteger = Integer.decode(object.toString());
-        Integer minInteger = Integer.decode(minValue);
-        result = objInteger.compareTo(minInteger) >= 0;
-      } else if (object instanceof Long) {
-        Long objLong = Long.decode(object.toString());
-        Long minLong = Long.decode(minValue);
-        result = objLong.compareTo(minLong) >= 0;
-      } else if ((object instanceof Float) || (object instanceof Double)) {
-        Double objDouble = Double.valueOf(object.toString());
-        Double minDouble = Double.valueOf(minValue);
-        result = objDouble.compareTo(minDouble) >= 0;
-      } else if (object instanceof BigInteger) {
-        BigInteger objInteger = (BigInteger) object;
-        BigInteger minInteger = new BigInteger(minValue);
-        result = objInteger.compareTo(minInteger) >= 0;
-      } else if (object instanceof BigDecimal) {
-        BigDecimal objDecimal = (BigDecimal) object;
-        BigDecimal minDecimal = new BigDecimal(minValue);
-        result = objDecimal.compareTo(minDecimal) >= 0;
-      }
-    }
-    else {
-      result = true;
-    }
-    
-    return result;
-  }
-
-  @Override
-  protected Collection<Validator> getDependantValidators() {
-    return Collections.emptySet();
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/NetworkAddressValidator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/NetworkAddressValidator.java
 
b/tajo-common/src/main/java/org/apache/tajo/validation/NetworkAddressValidator.java
deleted file mode 100644
index 7477c4c..0000000
--- 
a/tajo-common/src/main/java/org/apache/tajo/validation/NetworkAddressValidator.java
+++ /dev/null
@@ -1,103 +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.
- */
-
-package org.apache.tajo.validation;
-
-import java.util.Collection;
-import java.util.Collections;
-import java.util.regex.Pattern;
-
-import org.apache.http.conn.util.InetAddressUtils;
-
-public class NetworkAddressValidator extends AbstractValidator {
-  
-  private final Pattern hostnamePattern;
-  private final Pattern portNumberPattern;
-  
-  public NetworkAddressValidator() {
-    hostnamePattern = Pattern.compile(
-        "^[a-zA-Z][-a-zA-Z0-9\\\\._]+$");
-    portNumberPattern = Pattern.compile("^[1-6]?[0-9]{1,4}$");
-  }
-
-  @Override
-  protected <T> String getErrorMessage(T object) {
-    return object + " is not a valid network address representation.";
-  }
-
-  @Override
-  protected <T> boolean validateInternal(T object) {
-    boolean result = false;
-    
-    if (object != null) {
-      if (object instanceof CharSequence) {
-        String valueString = object.toString();
-        if (valueString.isEmpty()) {
-          result = true;
-        } else {
-          int separatorIdx = valueString.indexOf(':');
-          String hostOrIpAddress = null;
-          
-          if (separatorIdx > -1) {
-            if (valueString.indexOf(':', separatorIdx+1) > -1) {
-              // it is IPV6 representation.
-              int leftBracketsIdx = valueString.indexOf('[');
-              int rightBracketsIdx = valueString.indexOf(']');
-              int periodIdx = valueString.indexOf('.');
-              
-              if ((leftBracketsIdx > -1) && (rightBracketsIdx > -1) && 
-                  (valueString.length() > (rightBracketsIdx+1)) &&
-                  valueString.charAt(rightBracketsIdx+1) == ':') {
-                hostOrIpAddress = valueString.substring(leftBracketsIdx+1, 
rightBracketsIdx);
-                separatorIdx = rightBracketsIdx+1;
-              } else if ((periodIdx > -1)) {
-                hostOrIpAddress = valueString.substring(0, periodIdx);
-                separatorIdx = periodIdx;
-              } else {
-                separatorIdx = valueString.lastIndexOf(':');
-                hostOrIpAddress = valueString.substring(0, separatorIdx);
-              }
-            } else {            
-              hostOrIpAddress = valueString.substring(0, separatorIdx);
-            }
-          } else {
-            hostOrIpAddress = valueString;
-          }
-          
-          result = ((hostnamePattern.matcher(hostOrIpAddress).find()) | 
-              InetAddressUtils.isIPv4Address(hostOrIpAddress) |
-              InetAddressUtils.isIPv6Address(hostOrIpAddress));
-          
-          if (separatorIdx > -1) {
-            result &= 
portNumberPattern.matcher(valueString.substring(separatorIdx + 1)).find();
-          }
-        }
-      }
-    } else {
-      result = true;
-    }
-    
-    return result;
-  }
-
-  @Override
-  protected Collection<Validator> getDependantValidators() {
-    return Collections.emptySet();
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/NotNullValidator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/NotNullValidator.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/NotNullValidator.java
deleted file mode 100644
index d0ace1f..0000000
--- a/tajo-common/src/main/java/org/apache/tajo/validation/NotNullValidator.java
+++ /dev/null
@@ -1,47 +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.
- */
-
-package org.apache.tajo.validation;
-
-import java.util.Collection;
-import java.util.Collections;
-
-public class NotNullValidator extends AbstractValidator {
-
-  @Override
-  protected Collection<Validator> getDependantValidators() {
-    return Collections.emptySet();
-  }
-  
-  @Override
-  protected <T> String getErrorMessage(T object) {
-    return "Object is null";
-  }
-
-  @Override
-  protected <T> boolean validateInternal(T object) {
-    boolean result = false;
-    
-    if (object != null) {
-      result = true;
-    }
-    
-    return result;
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/PathValidator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/PathValidator.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/PathValidator.java
deleted file mode 100644
index a76587c..0000000
--- a/tajo-common/src/main/java/org/apache/tajo/validation/PathValidator.java
+++ /dev/null
@@ -1,32 +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.
- */
-
-package org.apache.tajo.validation;
-
-public class PathValidator extends PatternValidator {
-
-  public PathValidator() {
-    
super("^(?:[a-zA-Z][a-zA-Z0-9+-.]+:[/]{1,2}[a-zA-Z-.]*[:0-9]*)?(?:/?[a-zA-Z]:)?[/a-zA-Z0-9-_\\\\.\\\\$\\\\{\\\\}]*$");
-  }
-
-  @Override
-  protected <T> String getErrorMessage(T object) {
-    return object + " is not valid path.";
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/PatternValidator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/PatternValidator.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/PatternValidator.java
deleted file mode 100644
index 2a29671..0000000
--- a/tajo-common/src/main/java/org/apache/tajo/validation/PatternValidator.java
+++ /dev/null
@@ -1,63 +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.
- */
-
-package org.apache.tajo.validation;
-
-import java.util.Collection;
-import java.util.Collections;
-import java.util.regex.Pattern;
-
-public class PatternValidator extends AbstractValidator {
-  
-  private final Pattern pattern;
-  
-  public PatternValidator(String patternString) {
-    pattern = Pattern.compile(patternString);
-  }
-
-  @Override
-  protected <T> String getErrorMessage(T object) {
-    return object + " does not match to the " + pattern.pattern();
-  }
-
-  @Override
-  protected <T> boolean validateInternal(T object) {
-    boolean result = false;
-    
-    if (object != null) {
-      if (object instanceof CharSequence) {
-        String valueString = object.toString();
-        if (valueString.isEmpty()) {
-          result = true;
-        } else {
-          result = pattern.matcher((CharSequence) object).find();
-        }
-      }
-    } else {
-      result = true;
-    }
-    
-    return result;
-  }
-
-  @Override
-  protected Collection<Validator> getDependantValidators() {
-    return Collections.emptySet();
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/RangeValidator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/RangeValidator.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/RangeValidator.java
deleted file mode 100644
index ae6fd76..0000000
--- a/tajo-common/src/main/java/org/apache/tajo/validation/RangeValidator.java
+++ /dev/null
@@ -1,53 +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.
- */
-
-package org.apache.tajo.validation;
-
-import java.util.Collection;
-import java.util.Collections;
-
-public class RangeValidator extends AbstractValidator {
-  
-  private final String minValue;
-  private final AbstractValidator minValidator;
-  private final String maxValue;
-  private final AbstractValidator maxValidator;
-  
-  public RangeValidator(String minValue, String maxValue) {
-    this.minValue = minValue;
-    this.minValidator = new MinValidator(minValue);
-    this.maxValue = maxValue;
-    this.maxValidator = new MaxValidator(maxValue);
-  }
-
-  @Override
-  protected <T> String getErrorMessage(T object) {
-    return object + " is not a range of " + minValue + " and " + maxValue;
-  }
-
-  @Override
-  protected <T> boolean validateInternal(T object) {
-    return this.minValidator.validateInternal(object) & 
this.maxValidator.validateInternal(object);
-  }
-
-  @Override
-  protected Collection<Validator> getDependantValidators() {
-    return Collections.emptySet();
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/ShellVariableValidator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/ShellVariableValidator.java
 
b/tajo-common/src/main/java/org/apache/tajo/validation/ShellVariableValidator.java
deleted file mode 100644
index cfc0cc9..0000000
--- 
a/tajo-common/src/main/java/org/apache/tajo/validation/ShellVariableValidator.java
+++ /dev/null
@@ -1,32 +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.
- */
-
-package org.apache.tajo.validation;
-
-public class ShellVariableValidator extends PatternValidator {
-
-  public ShellVariableValidator() {
-    super("^[\\\\$]?[\\\\{]?[a-zA-Z0-9.]+[\\\\}]?$");
-  }
-
-  @Override
-  protected <T> String getErrorMessage(T object) {
-    return object + " is not a valid shell variable";
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/Validator.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/Validator.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/Validator.java
deleted file mode 100644
index 8f16fda..0000000
--- a/tajo-common/src/main/java/org/apache/tajo/validation/Validator.java
+++ /dev/null
@@ -1,29 +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.
- */
-
-package org.apache.tajo.validation;
-
-import java.util.Collection;
-
-public interface Validator {
-
-  public <T> Collection<ConstraintViolation> validate(T object);
-  
-  public <T> void validate(T object, boolean generateThrow);
-  
-}

http://git-wip-us.apache.org/repos/asf/tajo/blob/8741e682/tajo-common/src/main/java/org/apache/tajo/validation/Validators.java
----------------------------------------------------------------------
diff --git 
a/tajo-common/src/main/java/org/apache/tajo/validation/Validators.java 
b/tajo-common/src/main/java/org/apache/tajo/validation/Validators.java
deleted file mode 100644
index acd4876..0000000
--- a/tajo-common/src/main/java/org/apache/tajo/validation/Validators.java
+++ /dev/null
@@ -1,77 +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.
- */
-
-package org.apache.tajo.validation;
-
-import org.apache.tajo.util.TUtil;
-
-public class Validators {
-  
-  public static Validator groups(Validator...validators) {
-    return new GroupValidator(TUtil.newHashSet(validators));
-  }
-  
-  public static Validator length(int maxLength) {
-    return new LengthValidator(maxLength);
-  }
-  
-  public static Validator max(String maxValue) {
-    return new MaxValidator(maxValue);
-  }
-  
-  public static Validator min(String minValue) {
-    return new MinValidator(minValue);
-  }
-  
-  public static Validator notNull() {
-    return new NotNullValidator();
-  }
-  
-  public static Validator patternMatch(String regex) {
-    return new PatternValidator(regex);
-  }
-  
-  public static Validator range(String minValue, String maxValue) {
-    return new RangeValidator(minValue, maxValue);
-  }
-  
-  public static Validator pathUrl() {
-    return new PathValidator();
-  }
-  
-  public static Validator shellVar() {
-    return new ShellVariableValidator();
-  }
-  
-  public static Validator networkAddr() {
-    return new NetworkAddressValidator();
-  }
-  
-  public static Validator bool() {
-    return new BooleanValidator();
-  }
-  
-  public static Validator clazz() {
-    return new ClassValidator();
-  }
-  
-  public static Validator javaString() {
-    return new JavaStringValidator();
-  }
-  
-}

Reply via email to