| /* |
| * 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.io; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| import org.apache.hadoop.io.serializer.Deserializer; |
| import org.apache.hadoop.io.serializer.Serialization; |
| import org.apache.hadoop.io.serializer.Serializer; |
| import org.apache.sysds.runtime.matrix.data.MatrixBlock; |
| import org.apache.sysds.runtime.util.FastBufferedDataInputStream; |
| import org.apache.sysds.runtime.util.FastBufferedDataOutputStream; |
| |
| /** |
| * This custom serialization class can be used via |
| * job.set(MRConfigurationNames.IO_SERIALIZATIONS, "org.apache.sysds.runtime.io.BinaryBlockSerialization"); |
| * |
| * |
| */ |
| @SuppressWarnings("rawtypes") |
| public class BinaryBlockSerialization implements Serialization |
| { |
| @Override |
| public boolean accept(Class arg0) |
| { |
| boolean ret = false; |
| |
| if( //arg0 == MatrixIndexes.class || //binary block key |
| arg0 == MatrixBlock.class ) //binary block |
| { |
| ret = true; |
| } |
| |
| return ret; |
| } |
| |
| @Override |
| public Deserializer<MatrixBlock> getDeserializer(Class arg0) |
| { |
| return new MatrixBlockDeserializer(); |
| } |
| |
| @Override |
| public Serializer<MatrixBlock> getSerializer(Class arg0) |
| { |
| return new MatrixBlockSerializer(); |
| } |
| |
| public static class MatrixBlockDeserializer implements Deserializer<MatrixBlock> |
| { |
| private FastBufferedDataInputStream _in = null; |
| private MatrixBlock _buff = null; |
| |
| @Override |
| public void open(InputStream arg0) |
| throws IOException |
| { |
| _in = new FastBufferedDataInputStream( arg0 ); |
| } |
| |
| @Override |
| public MatrixBlock deserialize(MatrixBlock mb) |
| throws IOException |
| { |
| //internal buffer usage for robustness (if required) |
| if( mb == null ){ |
| if( _buff == null ) |
| _buff = new MatrixBlock(); |
| mb = _buff; |
| } |
| |
| //core deserialize |
| mb.readFields(_in); |
| |
| return mb; |
| } |
| |
| @Override |
| public void close() |
| throws IOException |
| { |
| IOUtilFunctions.closeSilently(_in); |
| } |
| } |
| |
| public static class MatrixBlockSerializer implements Serializer<MatrixBlock> |
| { |
| private FastBufferedDataOutputStream _out = null; |
| |
| @Override |
| public void open(OutputStream arg0) |
| throws IOException |
| { |
| _out = new FastBufferedDataOutputStream( arg0 ); |
| } |
| |
| @Override |
| public void serialize(MatrixBlock mb) |
| throws IOException |
| { |
| mb.write( _out ); |
| |
| //flush for guaranteed write (currently required) |
| _out.flush(); |
| } |
| |
| @Override |
| public void close() |
| throws IOException |
| { |
| IOUtilFunctions.closeSilently(_out); |
| } |
| } |
| } |