/***********************************************************************************************************************
* 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.types.IntValue;
import eu.stratosphere.types.Record;
import eu.stratosphere.types.StringValue;
import eu.stratosphere.util.Collector;
@SuppressWarnings("serial")
public class PartListJoin extends JoinFunction {
private final StringIntPair amountYearPair = new StringIntPair();
private final StringValue nationName = new StringValue();
/**
* Join "filteredParts" and "suppliers" by "suppkey".
*
* Output Schema:
* Key: (nation, year)
* Value: amount
*
*/
@Override
public void join(Record value1, Record value2, Collector<Record> out) throws Exception
{
StringIntPair amountYearPair = value1.getField(1, this.amountYearPair);
StringValue nationName = value2.getField(1, this.nationName);
IntValue year = amountYearPair.getSecond();
StringValue amount = amountYearPair.getFirst();
StringIntPair key = new StringIntPair(nationName, year);
value1.setField(0, key);
value1.setField(1, amount);
out.collect(value1);
}
}