shark.parse.SharkSemanticAnalyzerFactory.scala Maven / Gradle / Ivy
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/*
* Copyright (C) 2012 The Regents of The University California.
* All rights reserved.
*
* 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.
*/
package shark.parse
import org.apache.hadoop.hive.conf.HiveConf
import org.apache.hadoop.hive.ql.parse.{ASTNode, BaseSemanticAnalyzer, DDLSemanticAnalyzer,
ExplainSemanticAnalyzer, LoadSemanticAnalyzer, SemanticAnalyzerFactory, SemanticAnalyzer}
import shark.SharkConfVars
object SharkSemanticAnalyzerFactory {
/**
* Return a semantic analyzer for the given ASTNode.
*/
def get(conf: HiveConf, tree:ASTNode): BaseSemanticAnalyzer = {
val explainMode = SharkConfVars.getVar(conf, SharkConfVars.EXPLAIN_MODE) == "shark"
SemanticAnalyzerFactory.get(conf, tree) match {
case _: SemanticAnalyzer =>
new SharkSemanticAnalyzer(conf)
case _: ExplainSemanticAnalyzer if explainMode =>
new SharkExplainSemanticAnalyzer(conf)
case _: DDLSemanticAnalyzer =>
new SharkDDLSemanticAnalyzer(conf)
case _: LoadSemanticAnalyzer =>
new SharkLoadSemanticAnalyzer(conf)
case sem: BaseSemanticAnalyzer =>
sem
}
}
}