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Declarative Machine Learning
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.sysml.runtime.controlprogram.parfor;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import org.apache.hadoop.io.WritableComparable;
import org.apache.sysml.runtime.matrix.data.MatrixIndexes;
/**
* This class serves as composite key for the remote result merge job
* (for any data format) in order to sort on both matrix indexes and tag
* but group all blocks according to matrix indexes only. This prevents
* us from doing an 2pass out-of-core algorithm at the reducer since we
* can guarantee that the compare block (tag 0) will be the first element
* in the iterator.
*
*/
public class ResultMergeTaggedMatrixIndexes implements WritableComparable
{
private MatrixIndexes _ix;
private byte _tag = -1;
public ResultMergeTaggedMatrixIndexes()
{
_ix = new MatrixIndexes();
}
public ResultMergeTaggedMatrixIndexes(long r, long c, byte tag)
{
_ix = new MatrixIndexes(r, c);
_tag = tag;
}
public MatrixIndexes getIndexes()
{
return _ix;
}
public byte getTag()
{
return _tag;
}
public void setTag(byte tag)
{
_tag = tag;
}
@Override
public void readFields(DataInput in)
throws IOException
{
if( _ix == null )
_ix = new MatrixIndexes();
_ix.readFields(in);
_tag = in.readByte();
}
@Override
public void write(DataOutput out)
throws IOException
{
_ix.write(out);
out.writeByte(_tag);
}
@Override
public int compareTo(ResultMergeTaggedMatrixIndexes that)
{
int ret = _ix.compareTo(that._ix);
if( ret == 0 )
{
ret = ((_tag == that._tag) ? 0 :
(_tag < that._tag)? -1 : 1);
}
return ret;
}
@Override
public boolean equals(Object other)
{
if( !(other instanceof ResultMergeTaggedMatrixIndexes) )
return false;
ResultMergeTaggedMatrixIndexes that = (ResultMergeTaggedMatrixIndexes)other;
return (_ix.equals(that._ix) && _tag == that._tag);
}
@Override
public int hashCode() {
throw new RuntimeException("hashCode() should never be called on instances of this class.");
}
}