/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* 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 eu.stratosphere.test.recordJobs.relational.query9Util;
import eu.stratosphere.api.java.record.functions.JoinFunction;
import eu.stratosphere.test.recordJobs.util.Tuple;
import eu.stratosphere.types.IntValue;
import eu.stratosphere.types.Record;
import eu.stratosphere.types.StringValue;
import eu.stratosphere.util.Collector;
@SuppressWarnings("serial")
public class PartJoin extends JoinFunction {
private final Tuple partSuppValue = new Tuple();
private final IntValue partKey = new IntValue();
/**
* Join "part" and "partsupp" by "partkey".
*
* Output Schema:
* Key: (partkey, suppkey)
* Value: supplycost
*
*/
@Override
public void join(Record value1, Record value2, Collector<Record> out)
throws Exception {
IntValue partKey = value1.getField(0, this.partKey);
Tuple partSuppValue = value2.getField(1, this.partSuppValue);
IntPair newKey = new IntPair(partKey, new IntValue(Integer.parseInt(partSuppValue.getStringValueAt(0))));
String supplyCost = partSuppValue.getStringValueAt(1);
value1.setField(0, newKey);
value1.setField(1, new StringValue(supplyCost));
out.collect(value1);
}
}