// Copyright (c) 2013, Facebook, Inc. All rights reserved.
/**
* 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.hadoop.hive.ql.io.slice;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import com.google.common.base.Objects;
import com.google.common.io.CountingOutputStream;
import com.google.common.io.LittleEndianDataOutputStream;
import com.google.common.primitives.Ints;
public class OutputStreamSliceOutput
extends SliceOutput
{
private final CountingOutputStream countingOutputStream; // Used only to track byte usage
private final LittleEndianDataOutputStream dataOutputStream;
@SuppressWarnings("IOResourceOpenedButNotSafelyClosed")
public OutputStreamSliceOutput(OutputStream outputStream)
{
countingOutputStream = new CountingOutputStream(outputStream);
dataOutputStream = new LittleEndianDataOutputStream(countingOutputStream);
}
@Override
public void flush()
throws IOException
{
countingOutputStream.flush();
}
@Override
public void close()
throws IOException
{
countingOutputStream.close();
}
@Override
public void reset()
{
throw new UnsupportedOperationException("OutputStream can not be reset");
}
@Override
public int size()
{
return Ints.checkedCast(countingOutputStream.getCount());
}
@Override
public int writableBytes()
{
return Integer.MAX_VALUE;
}
@Override
public boolean isWritable()
{
return true;
}
@Override
public void writeByte(int value)
{
try {
dataOutputStream.writeByte(value);
}
catch (IOException e) {
throw new RuntimeIOException(e);
}
}
@Override
public void writeShort(int value)
{
try {
dataOutputStream.writeShort(value);
}
catch (IOException e) {
throw new RuntimeIOException(e);
}
}
@Override
public void writeInt(int value)
{
try {
dataOutputStream.writeInt(value);
}
catch (IOException e) {
throw new RuntimeIOException(e);
}
}
@Override
public void writeLong(long value)
{
try {
dataOutputStream.writeLong(value);
}
catch (IOException e) {
throw new RuntimeIOException(e);
}
}
@Override
public void writeDouble(double value)
{
try {
dataOutputStream.writeDouble(value);
}
catch (IOException e) {
throw new RuntimeIOException(e);
}
}
@Override
public void writeBytes(Slice source)
{
writeBytes(source, 0, source.length());
}
@Override
public void writeBytes(Slice source, int sourceIndex, int length)
{
try {
source.getBytes(sourceIndex, dataOutputStream, length);
}
catch (IOException e) {
throw new RuntimeIOException(e);
}
}
@Override
public void writeBytes(byte[] source)
{
writeBytes(source, 0, source.length);
}
@Override
public void writeBytes(byte[] source, int sourceIndex, int length)
{
try {
dataOutputStream.write(source, sourceIndex, length);
}
catch (IOException e) {
throw new RuntimeIOException(e);
}
}
@Override
public int writeBytes(InputStream in, int length)
throws IOException
{
int bytesRead = 0;
byte[] bytes = new byte[4096];
while (bytesRead < length) {
int newBytes = in.read(bytes);
if (newBytes < 0) {
break;
}
dataOutputStream.write(bytes, 0, Math.min(newBytes, length - bytesRead));
bytesRead += newBytes;
}
return bytesRead;
}
@Override
public SliceOutput appendLong(long value)
{
writeLong(value);
return this;
}
@Override
public SliceOutput appendDouble(double value)
{
writeDouble(value);
return this;
}
@Override
public SliceOutput appendInt(int value)
{
writeInt(value);
return this;
}
@Override
public SliceOutput appendShort(int value)
{
writeShort(value);
return this;
}
@Override
public SliceOutput appendBytes(byte[] source, int sourceIndex, int length)
{
writeBytes(source, sourceIndex, length);
return this;
}
@Override
public SliceOutput appendBytes(byte[] source)
{
writeBytes(source);
return this;
}
@Override
public SliceOutput appendBytes(Slice slice)
{
writeBytes(slice);
return this;
}
@Override
public Slice slice()
{
throw new UnsupportedOperationException();
}
@Override
public String toString()
{
return Objects.toStringHelper(this)
.add("countingOutputStream", countingOutputStream)
.add("dataOutputStream", dataOutputStream)
.toString();
}
}