io.netty.buffer.UnpooledHeapByteBuf Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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/*
* Copyright 2012 The Netty Project
*
* The Netty Project 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:
*
* https://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 io.netty.buffer;
import io.netty.util.internal.EmptyArrays;
import io.netty.util.internal.PlatformDependent;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.FileChannel;
import java.nio.channels.GatheringByteChannel;
import java.nio.channels.ScatteringByteChannel;
import static io.netty.util.internal.ObjectUtil.checkNotNull;
/**
* Big endian Java heap buffer implementation. It is recommended to use
* {@link UnpooledByteBufAllocator#heapBuffer(int, int)}, {@link Unpooled#buffer(int)} and
* {@link Unpooled#wrappedBuffer(byte[])} instead of calling the constructor explicitly.
*/
public class UnpooledHeapByteBuf extends AbstractReferenceCountedByteBuf {
private final ByteBufAllocator alloc;
byte[] array;
private ByteBuffer tmpNioBuf;
/**
* Creates a new heap buffer with a newly allocated byte array.
*
* @param initialCapacity the initial capacity of the underlying byte array
* @param maxCapacity the max capacity of the underlying byte array
*/
public UnpooledHeapByteBuf(ByteBufAllocator alloc, int initialCapacity, int maxCapacity) {
super(maxCapacity);
if (initialCapacity > maxCapacity) {
throw new IllegalArgumentException(String.format(
"initialCapacity(%d) > maxCapacity(%d)", initialCapacity, maxCapacity));
}
this.alloc = checkNotNull(alloc, "alloc");
setArray(allocateArray(initialCapacity));
setIndex(0, 0);
}
/**
* Creates a new heap buffer with an existing byte array.
*
* @param initialArray the initial underlying byte array
* @param maxCapacity the max capacity of the underlying byte array
*/
protected UnpooledHeapByteBuf(ByteBufAllocator alloc, byte[] initialArray, int maxCapacity) {
super(maxCapacity);
checkNotNull(alloc, "alloc");
checkNotNull(initialArray, "initialArray");
if (initialArray.length > maxCapacity) {
throw new IllegalArgumentException(String.format(
"initialCapacity(%d) > maxCapacity(%d)", initialArray.length, maxCapacity));
}
this.alloc = alloc;
setArray(initialArray);
setIndex(0, initialArray.length);
}
protected byte[] allocateArray(int initialCapacity) {
return new byte[initialCapacity];
}
protected void freeArray(byte[] array) {
// NOOP
}
private void setArray(byte[] initialArray) {
array = initialArray;
tmpNioBuf = null;
}
@Override
public ByteBufAllocator alloc() {
return alloc;
}
@Override
public ByteOrder order() {
return ByteOrder.BIG_ENDIAN;
}
@Override
public boolean isDirect() {
return false;
}
@Override
public int capacity() {
return array.length;
}
@Override
public ByteBuf capacity(int newCapacity) {
checkNewCapacity(newCapacity);
byte[] oldArray = array;
int oldCapacity = oldArray.length;
if (newCapacity == oldCapacity) {
return this;
}
int bytesToCopy;
if (newCapacity > oldCapacity) {
bytesToCopy = oldCapacity;
} else {
trimIndicesToCapacity(newCapacity);
bytesToCopy = newCapacity;
}
byte[] newArray = allocateArray(newCapacity);
System.arraycopy(oldArray, 0, newArray, 0, bytesToCopy);
setArray(newArray);
freeArray(oldArray);
return this;
}
@Override
public boolean hasArray() {
return true;
}
@Override
public byte[] array() {
ensureAccessible();
return array;
}
@Override
public int arrayOffset() {
return 0;
}
@Override
public boolean hasMemoryAddress() {
return false;
}
@Override
public long memoryAddress() {
throw new UnsupportedOperationException();
}
@Override
public ByteBuf getBytes(int index, ByteBuf dst, int dstIndex, int length) {
checkDstIndex(index, length, dstIndex, dst.capacity());
if (dst.hasMemoryAddress()) {
PlatformDependent.copyMemory(array, index, dst.memoryAddress() + dstIndex, length);
} else if (dst.hasArray()) {
getBytes(index, dst.array(), dst.arrayOffset() + dstIndex, length);
} else {
dst.setBytes(dstIndex, array, index, length);
}
return this;
}
@Override
public ByteBuf getBytes(int index, byte[] dst, int dstIndex, int length) {
checkDstIndex(index, length, dstIndex, dst.length);
System.arraycopy(array, index, dst, dstIndex, length);
return this;
}
@Override
public ByteBuf getBytes(int index, ByteBuffer dst) {
ensureAccessible();
dst.put(array, index, dst.remaining());
return this;
}
@Override
public ByteBuf getBytes(int index, OutputStream out, int length) throws IOException {
ensureAccessible();
out.write(array, index, length);
return this;
}
@Override
public int getBytes(int index, GatheringByteChannel out, int length) throws IOException {
ensureAccessible();
return getBytes(index, out, length, false);
}
@Override
public int getBytes(int index, FileChannel out, long position, int length) throws IOException {
ensureAccessible();
return getBytes(index, out, position, length, false);
}
private int getBytes(int index, GatheringByteChannel out, int length, boolean internal) throws IOException {
ensureAccessible();
ByteBuffer tmpBuf;
if (internal) {
tmpBuf = internalNioBuffer();
} else {
tmpBuf = ByteBuffer.wrap(array);
}
return out.write((ByteBuffer) tmpBuf.clear().position(index).limit(index + length));
}
private int getBytes(int index, FileChannel out, long position, int length, boolean internal) throws IOException {
ensureAccessible();
ByteBuffer tmpBuf = internal ? internalNioBuffer() : ByteBuffer.wrap(array);
return out.write((ByteBuffer) tmpBuf.clear().position(index).limit(index + length), position);
}
@Override
public int readBytes(GatheringByteChannel out, int length) throws IOException {
checkReadableBytes(length);
int readBytes = getBytes(readerIndex, out, length, true);
readerIndex += readBytes;
return readBytes;
}
@Override
public int readBytes(FileChannel out, long position, int length) throws IOException {
checkReadableBytes(length);
int readBytes = getBytes(readerIndex, out, position, length, true);
readerIndex += readBytes;
return readBytes;
}
@Override
public ByteBuf setBytes(int index, ByteBuf src, int srcIndex, int length) {
checkSrcIndex(index, length, srcIndex, src.capacity());
if (src.hasMemoryAddress()) {
PlatformDependent.copyMemory(src.memoryAddress() + srcIndex, array, index, length);
} else if (src.hasArray()) {
setBytes(index, src.array(), src.arrayOffset() + srcIndex, length);
} else {
src.getBytes(srcIndex, array, index, length);
}
return this;
}
@Override
public ByteBuf setBytes(int index, byte[] src, int srcIndex, int length) {
checkSrcIndex(index, length, srcIndex, src.length);
System.arraycopy(src, srcIndex, array, index, length);
return this;
}
@Override
public ByteBuf setBytes(int index, ByteBuffer src) {
ensureAccessible();
src.get(array, index, src.remaining());
return this;
}
@Override
public int setBytes(int index, InputStream in, int length) throws IOException {
ensureAccessible();
return in.read(array, index, length);
}
@Override
public int setBytes(int index, ScatteringByteChannel in, int length) throws IOException {
ensureAccessible();
try {
return in.read((ByteBuffer) internalNioBuffer().clear().position(index).limit(index + length));
} catch (ClosedChannelException ignored) {
return -1;
}
}
@Override
public int setBytes(int index, FileChannel in, long position, int length) throws IOException {
ensureAccessible();
try {
return in.read((ByteBuffer) internalNioBuffer().clear().position(index).limit(index + length), position);
} catch (ClosedChannelException ignored) {
return -1;
}
}
@Override
public int nioBufferCount() {
return 1;
}
@Override
public ByteBuffer nioBuffer(int index, int length) {
ensureAccessible();
return ByteBuffer.wrap(array, index, length).slice();
}
@Override
public ByteBuffer[] nioBuffers(int index, int length) {
return new ByteBuffer[] { nioBuffer(index, length) };
}
@Override
public ByteBuffer internalNioBuffer(int index, int length) {
checkIndex(index, length);
return (ByteBuffer) internalNioBuffer().clear().position(index).limit(index + length);
}
@Override
public final boolean isContiguous() {
return true;
}
@Override
public byte getByte(int index) {
ensureAccessible();
return _getByte(index);
}
@Override
protected byte _getByte(int index) {
return HeapByteBufUtil.getByte(array, index);
}
@Override
public short getShort(int index) {
ensureAccessible();
return _getShort(index);
}
@Override
protected short _getShort(int index) {
return HeapByteBufUtil.getShort(array, index);
}
@Override
public short getShortLE(int index) {
ensureAccessible();
return _getShortLE(index);
}
@Override
protected short _getShortLE(int index) {
return HeapByteBufUtil.getShortLE(array, index);
}
@Override
public int getUnsignedMedium(int index) {
ensureAccessible();
return _getUnsignedMedium(index);
}
@Override
protected int _getUnsignedMedium(int index) {
return HeapByteBufUtil.getUnsignedMedium(array, index);
}
@Override
public int getUnsignedMediumLE(int index) {
ensureAccessible();
return _getUnsignedMediumLE(index);
}
@Override
protected int _getUnsignedMediumLE(int index) {
return HeapByteBufUtil.getUnsignedMediumLE(array, index);
}
@Override
public int getInt(int index) {
ensureAccessible();
return _getInt(index);
}
@Override
protected int _getInt(int index) {
return HeapByteBufUtil.getInt(array, index);
}
@Override
public int getIntLE(int index) {
ensureAccessible();
return _getIntLE(index);
}
@Override
protected int _getIntLE(int index) {
return HeapByteBufUtil.getIntLE(array, index);
}
@Override
public long getLong(int index) {
ensureAccessible();
return _getLong(index);
}
@Override
protected long _getLong(int index) {
return HeapByteBufUtil.getLong(array, index);
}
@Override
public long getLongLE(int index) {
ensureAccessible();
return _getLongLE(index);
}
@Override
protected long _getLongLE(int index) {
return HeapByteBufUtil.getLongLE(array, index);
}
@Override
public ByteBuf setByte(int index, int value) {
ensureAccessible();
_setByte(index, value);
return this;
}
@Override
protected void _setByte(int index, int value) {
HeapByteBufUtil.setByte(array, index, value);
}
@Override
public ByteBuf setShort(int index, int value) {
ensureAccessible();
_setShort(index, value);
return this;
}
@Override
protected void _setShort(int index, int value) {
HeapByteBufUtil.setShort(array, index, value);
}
@Override
public ByteBuf setShortLE(int index, int value) {
ensureAccessible();
_setShortLE(index, value);
return this;
}
@Override
protected void _setShortLE(int index, int value) {
HeapByteBufUtil.setShortLE(array, index, value);
}
@Override
public ByteBuf setMedium(int index, int value) {
ensureAccessible();
_setMedium(index, value);
return this;
}
@Override
protected void _setMedium(int index, int value) {
HeapByteBufUtil.setMedium(array, index, value);
}
@Override
public ByteBuf setMediumLE(int index, int value) {
ensureAccessible();
_setMediumLE(index, value);
return this;
}
@Override
protected void _setMediumLE(int index, int value) {
HeapByteBufUtil.setMediumLE(array, index, value);
}
@Override
public ByteBuf setInt(int index, int value) {
ensureAccessible();
_setInt(index, value);
return this;
}
@Override
protected void _setInt(int index, int value) {
HeapByteBufUtil.setInt(array, index, value);
}
@Override
public ByteBuf setIntLE(int index, int value) {
ensureAccessible();
_setIntLE(index, value);
return this;
}
@Override
protected void _setIntLE(int index, int value) {
HeapByteBufUtil.setIntLE(array, index, value);
}
@Override
public ByteBuf setLong(int index, long value) {
ensureAccessible();
_setLong(index, value);
return this;
}
@Override
protected void _setLong(int index, long value) {
HeapByteBufUtil.setLong(array, index, value);
}
@Override
public ByteBuf setLongLE(int index, long value) {
ensureAccessible();
_setLongLE(index, value);
return this;
}
@Override
protected void _setLongLE(int index, long value) {
HeapByteBufUtil.setLongLE(array, index, value);
}
@Override
public ByteBuf copy(int index, int length) {
checkIndex(index, length);
return alloc().heapBuffer(length, maxCapacity()).writeBytes(array, index, length);
}
private ByteBuffer internalNioBuffer() {
ByteBuffer tmpNioBuf = this.tmpNioBuf;
if (tmpNioBuf == null) {
this.tmpNioBuf = tmpNioBuf = ByteBuffer.wrap(array);
}
return tmpNioBuf;
}
@Override
protected void deallocate() {
freeArray(array);
array = EmptyArrays.EMPTY_BYTES;
}
@Override
public ByteBuf unwrap() {
return null;
}
}