/*
* 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.tuple.hadoop.util;
import java.io.IOException;
import cascading.CascadingException;
import cascading.tuple.io.IndexTuple;
/** Class GroupingComparator is an implementation of {@link org.apache.hadoop.io.RawComparator}. */
public class CoGroupingComparator extends DeserializerComparator<IndexTuple>
{
public int compare( byte[] b1, int s1, int l1, byte[] b2, int s2, int l2 )
{
try
{
lhsBuffer.reset( b1, s1, l1 );
rhsBuffer.reset( b2, s2, l2 );
// pop off index
lhsStream.readVInt();
rhsStream.readVInt();
return compareTuples( groupComparators );
}
catch( IOException exception )
{
throw new CascadingException( exception );
}
finally
{
lhsBuffer.clear();
rhsBuffer.clear();
}
}
public int compare( IndexTuple lhs, IndexTuple rhs )
{
return compareTuples( groupComparators, lhs.getTuple(), rhs.getTuple() );
}
}