/***********************************************************************************************************************
* 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 FilteredPartsJoin extends JoinFunction {
private final IntPair partAndSupplierKey = new IntPair();
private final StringValue supplyCostStr = new StringValue();
private final Tuple ordersValue = new Tuple();
/**
* Join together parts and orderedParts by matching partkey and suppkey.
*
* Output Schema:
* Key: suppkey
* Value: (amount, year)
*
*/
@Override
public void join(Record value1, Record value2, Collector<Record> out)
throws Exception {
IntPair partAndSupplierKey = value1.getField(0, this.partAndSupplierKey);
StringValue supplyCostStr = value1.getField(1, this.supplyCostStr);
Tuple ordersValue = value2.getField(1, this.ordersValue);
IntValue year = new IntValue(Integer.parseInt(ordersValue.getStringValueAt(0)));
float quantity = Float.parseFloat(ordersValue.getStringValueAt(1));
float price = Float.parseFloat(ordersValue.getStringValueAt(2));
float supplyCost = Float.parseFloat(supplyCostStr.toString());
float amount = price - supplyCost * quantity;
/* Push (supplierKey, (amount, year)): */
value1.setField(0, partAndSupplierKey.getSecond());
value1.setField(1, new StringIntPair(new StringValue("" + amount), year));
out.collect(value1);
}
}