/*
* Copyright 2013 Chris Pheby
*
* Licensed 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.jadira.lang.io.buffered;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
/**
* A BufferedOutputStream where the buffer is provided by a NIO DirectByteBuffer. Use this class as an alternative to {@link java.io.BufferedOutputStream}
*/
public class DirectBytesBufferedOutputStream extends AbstractBufferedOutputStream {
private ByteBuffer buf;
/**
* Creates a new instance with the default buffer size
* @param out OutputStream to be decorated
* @see java.io.BufferedOutputStream#BufferedOutputStream(OutputStream)
*/
public DirectBytesBufferedOutputStream(OutputStream out) {
this(out, DEFAULT_BUFFER_SIZE);
}
/**
* Creates a new instance with the given buffer size in bytes.
* @param out OutputStream to be decorated
* @param size The size of the buffer in bytes
* @see java.io.BufferedOutputStream#BufferedOutputStream(OutputStream, int)
*/
public DirectBytesBufferedOutputStream(OutputStream out, int size) {
super(out);
if (size <= 0) {
throw new IllegalArgumentException("Buffer size may not be less than or equal to zero");
}
buf = ByteBuffer.allocateDirect(size);
}
/**
* Creates a new instance with the given buffer size in bytes.
* @param out OutputStream to be decorated
* @param size The size of the buffer in bytes
* @param useNativeByteOrder If true, native byte ordering will be used
* @see java.io.BufferedOutputStream#BufferedOutputStream(OutputStream, int)
*/
public DirectBytesBufferedOutputStream(OutputStream out, int size, boolean useNativeByteOrder) {
this(out, size);
buf.order(ByteOrder.nativeOrder());
}
/**
* Creates a new instance with the given buffer size in bytes.
* @param out OutputStream to be decorated
* @param size The size of the buffer in bytes
* @param byteOrder Indicates the byte order to be used.
* @see java.io.BufferedOutputStream#BufferedOutputStream(OutputStream, int)
*/
public DirectBytesBufferedOutputStream(OutputStream out, int size, ByteOrder byteOrder) {
this(out, size);
buf.order(byteOrder);
}
@Override
protected byte[] bytes() {
return buf.array();
}
@Override
protected void put(byte b) {
put(b);
}
@Override
protected void put(int count, byte[] b, int off, int len) {
if (off == 0) {
buf.put(b, count, len);
} else {
byte[] bc = new byte[len];
System.arraycopy(b, off, bc, 0, len);
buf.put(bc, count, len);
}
}
@Override
protected int limit() {
return buf.limit();
}
@SuppressWarnings("restriction")
@Override
protected void clean() {
if (buf == null) {
return;
}
sun.misc.Cleaner cleaner = ((sun.nio.ch.DirectBuffer) buf).cleaner();
if (cleaner != null) {
cleaner.clean();
}
}
}