/*
* Copyright (c) 2007-2014 Concurrent, Inc. All Rights Reserved.
*
* Project and contact information: http://www.cascading.org/
*
* This file is part of the Cascading project.
*
* 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 cascading;
import java.util.Iterator;
import cascading.flow.FlowProcess;
import cascading.operation.BaseOperation;
import cascading.operation.Buffer;
import cascading.operation.BufferCall;
import cascading.pipe.joiner.JoinerClosure;
import cascading.tuple.Fields;
import cascading.tuple.Tuple;
/**
*
*/
public class InnerJoinTestBuffer extends BaseOperation implements Buffer
{
public InnerJoinTestBuffer( Fields declaredFields )
{
super( declaredFields );
}
@Override
public void operate( FlowProcess flowProcess, BufferCall bufferCall )
{
JoinerClosure joinerClosure = bufferCall.getJoinerClosure();
if( joinerClosure.size() != 2 )
throw new IllegalArgumentException( "joiner size wrong" );
Iterator<Tuple> lhs = joinerClosure.getIterator( 0 );
while( lhs.hasNext() )
{
Tuple lhsTuple = lhs.next();
Iterator<Tuple> rhs = joinerClosure.getIterator( 1 );
while( rhs.hasNext() )
{
Tuple rhsTuple = rhs.next();
Tuple result = new Tuple();
result.addAll( lhsTuple );
result.addAll( rhsTuple );
bufferCall.getOutputCollector().add( result );
}
}
}
}