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Declarative Machine Learning
/*
* 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.caching;
import java.io.DataInput;
import java.io.IOException;
import org.apache.sysml.runtime.matrix.data.MatrixBlockDataInput;
import org.apache.sysml.runtime.matrix.data.SparseRow;
public class CacheDataInput implements DataInput, MatrixBlockDataInput
{
protected byte[] _buff;
protected int _bufflen;
protected int _count;
public CacheDataInput( byte[] mem )
{
_buff = mem;
_bufflen = _buff.length;
_count = 0;
}
@Override
public void readFully(byte[] b) throws IOException {
throw new IOException("Not supported.");
}
@Override
public void readFully(byte[] b, int off, int len) throws IOException {
throw new IOException("Not supported.");
}
@Override
public int skipBytes(int n) throws IOException {
throw new IOException("Not supported.");
}
@Override
public boolean readBoolean()
throws IOException
{
//mask to adhere to the input stream semantic
return ( (_buff[_count++] & 0xFF) != 0 );
}
@Override
public byte readByte()
throws IOException
{
//mask to adhere to the input stream semantic
return (byte) (_buff[_count++] & 0xFF);
}
@Override
public int readUnsignedByte() throws IOException {
throw new IOException("Not supported.");
}
@Override
public short readShort() throws IOException {
throw new IOException("Not supported.");
}
@Override
public int readUnsignedShort() throws IOException {
throw new IOException("Not supported.");
}
@Override
public char readChar() throws IOException {
throw new IOException("Not supported.");
}
@Override
public int readInt()
throws IOException
{
int ret = baToInt(_buff, _count);
_count += 4;
return ret;
}
@Override
public long readLong()
throws IOException
{
long ret = baToLong(_buff, _count);
_count += 8;
return ret;
}
@Override
public float readFloat() throws IOException {
throw new IOException("Not supported.");
}
@Override
public double readDouble()
throws IOException
{
long tmp = baToLong(_buff, _count);
double tmp2 = Double.longBitsToDouble(tmp);
_count += 8;
return tmp2;
}
@Override
public String readLine() throws IOException {
throw new IOException("Not supported.");
}
@Override
public String readUTF() throws IOException {
throw new IOException("Not supported.");
}
///////////////////////////////////////////////
// Implementation of MatrixBlockDSMDataOutput
///////////////////////////////////////////////
@Override
public long readDoubleArray(int len, double[] varr)
throws IOException
{
//counter for non-zero elements
long nnz = 0;
int off = _count;
for( int i=0; i 0 ) //non-zero row
{
//get handle to sparse (allocate if necessary)
if( rows[i] == null )
rows[i] = new SparseRow(lnnz);
SparseRow arow = rows[i];
//read single sparse row
for( int j=0; j