297 lines
8.2 KiB
Java
297 lines
8.2 KiB
Java
/*
|
|
* Copyright 2009 Red Hat, Inc.
|
|
*
|
|
* Red Hat 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.jboss.netty.buffer;
|
|
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
import java.io.OutputStream;
|
|
import java.nio.ByteBuffer;
|
|
import java.nio.ByteOrder;
|
|
import java.nio.channels.GatheringByteChannel;
|
|
import java.nio.channels.ScatteringByteChannel;
|
|
|
|
|
|
/**
|
|
* A dynamic capacity buffer which increases its capacity as needed. It is
|
|
* recommended to use {@link ChannelBuffers#dynamicBuffer(int)} instead of
|
|
* calling the constructor explicitly.
|
|
*
|
|
* @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
|
|
* @author <a href="http://gleamynode.net/">Trustin Lee</a>
|
|
*
|
|
* @version $Rev: 2206M $, $Date: 2010-11-09 15:04:10 +0900 (Tue, 09 Nov 2010) $
|
|
*
|
|
*/
|
|
public class DynamicChannelBuffer extends AbstractChannelBuffer {
|
|
|
|
private final ChannelBufferFactory factory;
|
|
private final ByteOrder endianness;
|
|
private ChannelBuffer buffer;
|
|
|
|
public DynamicChannelBuffer(int estimatedLength) {
|
|
this(ByteOrder.BIG_ENDIAN, estimatedLength);
|
|
}
|
|
|
|
public DynamicChannelBuffer(ByteOrder endianness, int estimatedLength) {
|
|
this(endianness, estimatedLength, HeapChannelBufferFactory.getInstance(endianness));
|
|
}
|
|
|
|
public DynamicChannelBuffer(ByteOrder endianness, int estimatedLength, ChannelBufferFactory factory) {
|
|
if (estimatedLength < 0) {
|
|
throw new IllegalArgumentException("estimatedLength: " + estimatedLength);
|
|
}
|
|
if (endianness == null) {
|
|
throw new NullPointerException("endianness");
|
|
}
|
|
if (factory == null) {
|
|
throw new NullPointerException("factory");
|
|
}
|
|
this.factory = factory;
|
|
this.endianness = endianness;
|
|
buffer = factory.getBuffer(order(), estimatedLength);
|
|
}
|
|
|
|
@Override
|
|
public void ensureWritableBytes(int minWritableBytes) {
|
|
if (minWritableBytes <= writableBytes()) {
|
|
return;
|
|
}
|
|
|
|
int newCapacity;
|
|
if (capacity() == 0) {
|
|
newCapacity = 1;
|
|
} else {
|
|
newCapacity = capacity();
|
|
}
|
|
int minNewCapacity = writerIndex() + minWritableBytes;
|
|
while (newCapacity < minNewCapacity) {
|
|
newCapacity <<= 1;
|
|
}
|
|
|
|
ChannelBuffer newBuffer = factory().getBuffer(order(), newCapacity);
|
|
newBuffer.writeBytes(buffer, 0, writerIndex());
|
|
buffer = newBuffer;
|
|
}
|
|
|
|
public ChannelBufferFactory factory() {
|
|
return factory;
|
|
}
|
|
|
|
public ByteOrder order() {
|
|
return endianness;
|
|
}
|
|
|
|
public boolean isDirect() {
|
|
return buffer.isDirect();
|
|
}
|
|
|
|
public int capacity() {
|
|
return buffer.capacity();
|
|
}
|
|
|
|
public boolean hasArray() {
|
|
return buffer.hasArray();
|
|
}
|
|
|
|
public byte[] array() {
|
|
return buffer.array();
|
|
}
|
|
|
|
public int arrayOffset() {
|
|
return buffer.arrayOffset();
|
|
}
|
|
|
|
public byte getByte(int index) {
|
|
return buffer.getByte(index);
|
|
}
|
|
|
|
public short getShort(int index) {
|
|
return buffer.getShort(index);
|
|
}
|
|
|
|
public int getUnsignedMedium(int index) {
|
|
return buffer.getUnsignedMedium(index);
|
|
}
|
|
|
|
public int getInt(int index) {
|
|
return buffer.getInt(index);
|
|
}
|
|
|
|
public long getLong(int index) {
|
|
return buffer.getLong(index);
|
|
}
|
|
|
|
public void getBytes(int index, byte[] dst, int dstIndex, int length) {
|
|
buffer.getBytes(index, dst, dstIndex, length);
|
|
}
|
|
|
|
public void getBytes(int index, ChannelBuffer dst, int dstIndex, int length) {
|
|
buffer.getBytes(index, dst, dstIndex, length);
|
|
}
|
|
|
|
public void getBytes(int index, ByteBuffer dst) {
|
|
buffer.getBytes(index, dst);
|
|
}
|
|
|
|
public int getBytes(int index, GatheringByteChannel out, int length)
|
|
throws IOException {
|
|
return buffer.getBytes(index, out, length);
|
|
}
|
|
|
|
public void getBytes(int index, OutputStream out, int length)
|
|
throws IOException {
|
|
buffer.getBytes(index, out, length);
|
|
}
|
|
|
|
public void setByte(int index, int value) {
|
|
buffer.setByte(index, value);
|
|
}
|
|
|
|
public void setShort(int index, int value) {
|
|
buffer.setShort(index, value);
|
|
}
|
|
|
|
public void setMedium(int index, int value) {
|
|
buffer.setMedium(index, value);
|
|
}
|
|
|
|
public void setInt(int index, int value) {
|
|
buffer.setInt(index, value);
|
|
}
|
|
|
|
public void setLong(int index, long value) {
|
|
buffer.setLong(index, value);
|
|
}
|
|
|
|
public void setBytes(int index, byte[] src, int srcIndex, int length) {
|
|
buffer.setBytes(index, src, srcIndex, length);
|
|
}
|
|
|
|
public void setBytes(int index, ChannelBuffer src, int srcIndex, int length) {
|
|
buffer.setBytes(index, src, srcIndex, length);
|
|
}
|
|
|
|
public void setBytes(int index, ByteBuffer src) {
|
|
buffer.setBytes(index, src);
|
|
}
|
|
|
|
public int setBytes(int index, InputStream in, int length)
|
|
throws IOException {
|
|
return buffer.setBytes(index, in, length);
|
|
}
|
|
|
|
public int setBytes(int index, ScatteringByteChannel in, int length)
|
|
throws IOException {
|
|
return buffer.setBytes(index, in, length);
|
|
}
|
|
|
|
@Override
|
|
public void writeByte(int value) {
|
|
ensureWritableBytes(1);
|
|
super.writeByte(value);
|
|
}
|
|
|
|
@Override
|
|
public void writeShort(int value) {
|
|
ensureWritableBytes(2);
|
|
super.writeShort(value);
|
|
}
|
|
|
|
@Override
|
|
public void writeMedium(int value) {
|
|
ensureWritableBytes(3);
|
|
super.writeMedium(value);
|
|
}
|
|
|
|
@Override
|
|
public void writeInt(int value) {
|
|
ensureWritableBytes(4);
|
|
super.writeInt(value);
|
|
}
|
|
|
|
@Override
|
|
public void writeLong(long value) {
|
|
ensureWritableBytes(8);
|
|
super.writeLong(value);
|
|
}
|
|
|
|
@Override
|
|
public void writeBytes(byte[] src, int srcIndex, int length) {
|
|
ensureWritableBytes(length);
|
|
super.writeBytes(src, srcIndex, length);
|
|
}
|
|
|
|
@Override
|
|
public void writeBytes(ChannelBuffer src, int srcIndex, int length) {
|
|
ensureWritableBytes(length);
|
|
super.writeBytes(src, srcIndex, length);
|
|
}
|
|
|
|
@Override
|
|
public void writeBytes(ByteBuffer src) {
|
|
ensureWritableBytes(src.remaining());
|
|
super.writeBytes(src);
|
|
}
|
|
|
|
@Override
|
|
public int writeBytes(InputStream in, int length) throws IOException {
|
|
ensureWritableBytes(length);
|
|
return super.writeBytes(in, length);
|
|
}
|
|
|
|
@Override
|
|
public int writeBytes(ScatteringByteChannel in, int length)
|
|
throws IOException {
|
|
ensureWritableBytes(length);
|
|
return super.writeBytes(in, length);
|
|
}
|
|
|
|
@Override
|
|
public void writeZero(int length) {
|
|
ensureWritableBytes(length);
|
|
super.writeZero(length);
|
|
}
|
|
|
|
public ChannelBuffer duplicate() {
|
|
return new DuplicatedChannelBuffer(this);
|
|
}
|
|
|
|
public ChannelBuffer copy(int index, int length) {
|
|
DynamicChannelBuffer copiedBuffer = new DynamicChannelBuffer(order(), Math.max(length, 64), factory());
|
|
copiedBuffer.buffer = buffer.copy(index, length);
|
|
copiedBuffer.setIndex(0, length);
|
|
return copiedBuffer;
|
|
}
|
|
|
|
public ChannelBuffer slice(int index, int length) {
|
|
if (index == 0) {
|
|
if (length == 0) {
|
|
return ChannelBuffers.EMPTY_BUFFER;
|
|
}
|
|
return new TruncatedChannelBuffer(this, length);
|
|
} else {
|
|
if (length == 0) {
|
|
return ChannelBuffers.EMPTY_BUFFER;
|
|
}
|
|
return new SlicedChannelBuffer(this, index, length);
|
|
}
|
|
}
|
|
|
|
public ByteBuffer toByteBuffer(int index, int length) {
|
|
return buffer.toByteBuffer(index, length);
|
|
}
|
|
}
|