/**
* Copyright 2013-2014 Recruit Technologies Co., Ltd. and contributors
* (see CONTRIBUTORS.md)
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. A copy of the
* License is distributed with this work in the LICENSE.md file. You may
* also obtain a copy of the License from
*
* 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.gennai.gungnir.ql.analysis.analyzer;
import org.gennai.gungnir.ql.analysis.ASTNode;
import org.gennai.gungnir.ql.analysis.SemanticAnalyzeException;
import org.gennai.gungnir.ql.analysis.SemanticAnalyzer;
import org.gennai.gungnir.topology.udf.Cast;
import org.gennai.gungnir.topology.udf.Function;
import org.gennai.gungnir.tuple.schema.FieldType;
public class CastAnalyzer implements Analyzer<Function<?>> {
@Override
public Function<?> analyze(ASTNode node, SemanticAnalyzer semanticAnalyzer)
throws SemanticAnalyzeException {
Object castExpr = semanticAnalyzer.analyzeByAnalyzer(node.getChild(0));
FieldType fieldType = semanticAnalyzer.analyzeByAnalyzer(node.getChild(1));
Cast func = null;
try {
func = new Cast().create(castExpr, fieldType);
} catch (Exception e) {
throw new SemanticAnalyzeException("Faild to create 'cast' function", e);
}
return func;
}
}