org.apache.pig.builtin.ENDSWITH Maven / Gradle / Ivy
/**
* 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.pig.builtin;
import java.util.ArrayList;
import java.util.List;
import org.apache.pig.EvalFunc;
import org.apache.pig.FuncSpec;
import org.apache.pig.PigWarning;
import org.apache.pig.data.DataType;
import org.apache.pig.data.Tuple;
import org.apache.pig.backend.executionengine.ExecException;
import org.apache.pig.impl.logicalLayer.FrontendException;
import org.apache.pig.impl.logicalLayer.schema.Schema;
/**
* Pig UDF to test input tuple.get(0) against tuple.get(1)
* to determine if the first argument ends with the string in the second.
*/
public class ENDSWITH extends EvalFunc {
@Override
public Boolean exec(Tuple tuple) {
if (tuple == null || tuple.size() != 2) {
warn("invalid number of arguments to ENDSWITH", PigWarning.UDF_WARNING_1);
return null;
}
String argument = null;
String testAgainst = null;
try {
argument = (String) tuple.get(0);
testAgainst = (String) tuple.get(1);
return argument.endsWith(testAgainst);
} catch (NullPointerException npe) {
warn(npe.toString(), PigWarning.UDF_WARNING_2);
return null;
} catch (ClassCastException cce) {
warn(cce.toString(), PigWarning.UDF_WARNING_3);
return null;
} catch (ExecException ee) {
warn(ee.toString(), PigWarning.UDF_WARNING_4);
return null;
}
}
@Override
public Schema outputSchema(Schema input) {
return new Schema(new Schema.FieldSchema(null, DataType.BOOLEAN));
}
@Override
public List getArgToFuncMapping() throws FrontendException {
List funcList = new ArrayList();
Schema s = new Schema();
s.add(new Schema.FieldSchema(null, DataType.CHARARRAY));
s.add(new Schema.FieldSchema(null, DataType.CHARARRAY));
funcList.add(new FuncSpec(this.getClass().getName(), s));
return funcList;
}
}