| /* |
| * 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.data; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.Externalizable; |
| import java.io.IOException; |
| import java.io.ObjectInput; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutput; |
| import java.io.ObjectOutputStream; |
| |
| import org.apache.sysds.runtime.matrix.data.MatrixBlock; |
| import org.apache.sysds.runtime.util.FastBufferedDataInputStream; |
| import org.apache.sysds.runtime.util.FastBufferedDataOutputStream; |
| |
| |
| public class RowMatrixBlock implements Externalizable |
| { |
| private static final long serialVersionUID = 3307673667643705793L; |
| |
| private int _len = -1; // block num rows |
| private int _row = -1; // in-block row pos |
| private MatrixBlock _value = null; |
| |
| public RowMatrixBlock() { |
| //do nothing (required for Externalizable) |
| } |
| |
| public RowMatrixBlock( int len, int row, MatrixBlock value ) { |
| _len = len; |
| _row = row; |
| _value = value; |
| } |
| |
| public int getLen(){ |
| return _len; |
| } |
| |
| public int getRow(){ |
| return _row; |
| } |
| |
| public MatrixBlock getValue(){ |
| return _value; |
| } |
| |
| |
| /** |
| * Redirects the default java serialization via externalizable to our default |
| * hadoop writable serialization for efficient deserialization. |
| * |
| * @param is object input |
| * @throws IOException if IOException occurs |
| */ |
| @Override |
| public void readExternal(ObjectInput is) |
| throws IOException |
| { |
| DataInput dis = is; |
| |
| if( is instanceof ObjectInputStream ) { |
| //fast deserialize of dense/sparse blocks |
| ObjectInputStream ois = (ObjectInputStream)is; |
| dis = new FastBufferedDataInputStream(ois); |
| } |
| |
| readHeaderAndPayload(dis); |
| } |
| |
| /** |
| * Redirects the default java serialization via externalizable to our default |
| * hadoop writable serialization for efficient serialization. |
| * |
| * @param os object output |
| * @throws IOException if IOException occurs |
| */ |
| @Override |
| public void writeExternal(ObjectOutput os) |
| throws IOException |
| { |
| if( os instanceof ObjectOutputStream ) { |
| //fast serialize of dense/sparse blocks |
| ObjectOutputStream oos = (ObjectOutputStream)os; |
| FastBufferedDataOutputStream fos = new FastBufferedDataOutputStream(oos); |
| writeHeaderAndPayload(fos); |
| fos.flush(); |
| } |
| else { |
| //default serialize (general case) |
| writeHeaderAndPayload(os); |
| } |
| } |
| |
| private void writeHeaderAndPayload(DataOutput dos) |
| throws IOException |
| { |
| dos.writeInt(_len); |
| dos.writeInt(_row); |
| _value.write(dos); |
| } |
| |
| private void readHeaderAndPayload(DataInput dis) |
| throws IOException |
| { |
| _len = dis.readInt(); |
| _row = dis.readInt(); |
| _value = new MatrixBlock(); |
| _value.readFields(dis); |
| } |
| } |