| /* |
| * 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.sysds.runtime.instructions.spark.functions; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| |
| import org.apache.spark.api.java.function.PairFlatMapFunction; |
| import org.apache.sysds.runtime.matrix.data.MatrixBlock; |
| import org.apache.sysds.runtime.matrix.data.MatrixIndexes; |
| |
| import scala.Tuple2; |
| |
| |
| public class ReplicateVectorFunction implements PairFlatMapFunction<Tuple2<MatrixIndexes,MatrixBlock>, MatrixIndexes,MatrixBlock> |
| { |
| |
| private static final long serialVersionUID = -1505557561471236851L; |
| |
| private boolean _byRow; |
| private long _numReplicas; |
| |
| public ReplicateVectorFunction(boolean byRow, long numReplicas) |
| { |
| _byRow = byRow; |
| _numReplicas = numReplicas; |
| } |
| |
| @Override |
| public Iterator<Tuple2<MatrixIndexes, MatrixBlock>> call(Tuple2<MatrixIndexes, MatrixBlock> arg0) |
| throws Exception |
| { |
| MatrixIndexes ix = arg0._1(); |
| MatrixBlock mb = arg0._2(); |
| |
| //sanity check inputs |
| if(_byRow && (ix.getRowIndex() != 1 || mb.getNumRows()>1) ) { |
| throw new Exception("Expected a row vector in ReplicateVector"); |
| } |
| if(!_byRow && (ix.getColumnIndex() != 1 || mb.getNumColumns()>1) ) { |
| throw new Exception("Expected a column vector in ReplicateVector"); |
| } |
| |
| ArrayList<Tuple2<MatrixIndexes, MatrixBlock>> retVal = new ArrayList<>(); |
| for(int i = 1; i <= _numReplicas; i++) { |
| if( _byRow ) |
| retVal.add(new Tuple2<>(new MatrixIndexes(i, ix.getColumnIndex()), mb)); |
| else |
| retVal.add(new Tuple2<>(new MatrixIndexes(ix.getRowIndex(), i), mb)); |
| } |
| return retVal.iterator(); |
| } |
| } |