org.apache.sysml.runtime.controlprogram.parfor.ResultMergeRemoteSparkWCompare Maven / Gradle / Ivy

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Declarative Machine Learning

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/*
 * 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.util.Iterator;

import org.apache.spark.api.java.function.PairFunction;

import scala.Tuple2;

import org.apache.sysml.runtime.DMLRuntimeException;
import org.apache.sysml.runtime.controlprogram.caching.MatrixObject;
import org.apache.sysml.runtime.matrix.data.MatrixBlock;
import org.apache.sysml.runtime.matrix.data.MatrixIndexes;
import org.apache.sysml.runtime.util.DataConverter;

/**
 * 
 */
public class ResultMergeRemoteSparkWCompare extends ResultMerge implements PairFunction,MatrixBlock>>, MatrixIndexes, MatrixBlock>
{
	
	private static final long serialVersionUID = -5970805069405942836L;
	
	@Override
	public Tuple2 call(Tuple2, MatrixBlock>> arg)
		throws Exception 
	{
		MatrixIndexes ixin = arg._1();
		Iterator din = arg._2()._1().iterator();
		MatrixBlock cin = arg._2()._2();
		
		//create compare array
		double[][] compare = DataConverter.convertToDoubleMatrix(cin);
		
		//merge all blocks into compare block
		MatrixBlock out = new MatrixBlock(cin);
		while( din.hasNext() )
			mergeWithComp(out, din.next(), compare);
		
		//create output tuple
		return new Tuple2(new MatrixIndexes(ixin), out);
	}

	@Override
	public MatrixObject executeSerialMerge() 
			throws DMLRuntimeException 
	{
		throw new DMLRuntimeException("Unsupported operation.");
	}

	@Override
	public MatrixObject executeParallelMerge(int par)
			throws DMLRuntimeException 
	{
		throw new DMLRuntimeException("Unsupported operation.");
	}
}