| /* |
| * 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.Iterator; |
| |
| import org.apache.spark.api.java.function.FlatMapFunction; |
| import org.apache.sysds.runtime.matrix.data.BinaryBlockToTextCellConverter; |
| import org.apache.sysds.runtime.matrix.data.MatrixBlock; |
| import org.apache.sysds.runtime.matrix.data.MatrixIndexes; |
| |
| import scala.Tuple2; |
| |
| public class ConvertMatrixBlockToIJVLines implements FlatMapFunction<Tuple2<MatrixIndexes,MatrixBlock>, String> { |
| |
| private static final long serialVersionUID = 3555147684480763957L; |
| |
| int blen; |
| public ConvertMatrixBlockToIJVLines(int blen) { |
| this.blen = blen; |
| } |
| |
| @Override |
| public Iterator<String> call(Tuple2<MatrixIndexes, MatrixBlock> kv) { |
| final BinaryBlockToTextCellConverter converter = new BinaryBlockToTextCellConverter(); |
| converter.setBlockSize(blen, blen); |
| converter.convert(kv._1, kv._2); |
| |
| Iterable<String> ret = new Iterable<String>() { |
| @Override |
| public Iterator<String> iterator() { |
| return new Iterator<String>() { |
| |
| @Override |
| public void remove() {} |
| |
| @Override |
| public String next() { |
| return converter.next().getValue().toString(); |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return converter.hasNext(); |
| } |
| }; |
| } |
| }; |
| |
| return ret.iterator(); |
| } |
| |
| } |