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 Jakarta Enterprise Beans and Jakarta Messaging, including
all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and
Jakarta Messaging 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).
/*
* 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:
*
* 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 io.netty.buffer;
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.GatheringByteChannel;
import java.nio.channels.ScatteringByteChannel;
/**
* Big endian Java heap buffer implementation.
*/
public class UnpooledHeapByteBuf extends AbstractReferenceCountedByteBuf {
private final ByteBufAllocator alloc;
private 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
*/
protected UnpooledHeapByteBuf(ByteBufAllocator alloc, int initialCapacity, int maxCapacity) {
this(alloc, new byte[initialCapacity], 0, 0, maxCapacity);
}
/**
* 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) {
this(alloc, initialArray, 0, initialArray.length, maxCapacity);
}
private UnpooledHeapByteBuf(
ByteBufAllocator alloc, byte[] initialArray, int readerIndex, int writerIndex, int maxCapacity) {
super(maxCapacity);
if (alloc == null) {
throw new NullPointerException("alloc");
}
if (initialArray == null) {
throw new NullPointerException("initialArray");
}
if (initialArray.length > maxCapacity) {
throw new IllegalArgumentException(String.format(
"initialCapacity(%d) > maxCapacity(%d)", initialArray.length, maxCapacity));
}
this.alloc = alloc;
setArray(initialArray);
setIndex(readerIndex, writerIndex);
}
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() {
ensureAccessible();
return array.length;
}
@Override
public ByteBuf capacity(int newCapacity) {
ensureAccessible();
if (newCapacity < 0 || newCapacity > maxCapacity()) {
throw new IllegalArgumentException("newCapacity: " + newCapacity);
}
int oldCapacity = array.length;
if (newCapacity > oldCapacity) {
byte[] newArray = new byte[newCapacity];
System.arraycopy(array, 0, newArray, 0, array.length);
setArray(newArray);
} else if (newCapacity < oldCapacity) {
byte[] newArray = new byte[newCapacity];
int readerIndex = readerIndex();
if (readerIndex < newCapacity) {
int writerIndex = writerIndex();
if (writerIndex > newCapacity) {
writerIndex(writerIndex = newCapacity);
}
System.arraycopy(array, readerIndex, newArray, readerIndex, writerIndex - readerIndex);
} else {
setIndex(newCapacity, newCapacity);
}
setArray(newArray);
}
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, Math.min(capacity() - 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);
}
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));
}
@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 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 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 byte getByte(int index) {
ensureAccessible();
return _getByte(index);
}
@Override
protected byte _getByte(int index) {
return array[index];
}
@Override
public short getShort(int index) {
ensureAccessible();
return _getShort(index);
}
@Override
protected short _getShort(int index) {
return (short) (array[index] << 8 | array[index + 1] & 0xFF);
}
@Override
public int getUnsignedMedium(int index) {
ensureAccessible();
return _getUnsignedMedium(index);
}
@Override
protected int _getUnsignedMedium(int index) {
return (array[index] & 0xff) << 16 |
(array[index + 1] & 0xff) << 8 |
array[index + 2] & 0xff;
}
@Override
public int getInt(int index) {
ensureAccessible();
return _getInt(index);
}
@Override
protected int _getInt(int index) {
return (array[index] & 0xff) << 24 |
(array[index + 1] & 0xff) << 16 |
(array[index + 2] & 0xff) << 8 |
array[index + 3] & 0xff;
}
@Override
public long getLong(int index) {
ensureAccessible();
return _getLong(index);
}
@Override
protected long _getLong(int index) {
return ((long) array[index] & 0xff) << 56 |
((long) array[index + 1] & 0xff) << 48 |
((long) array[index + 2] & 0xff) << 40 |
((long) array[index + 3] & 0xff) << 32 |
((long) array[index + 4] & 0xff) << 24 |
((long) array[index + 5] & 0xff) << 16 |
((long) array[index + 6] & 0xff) << 8 |
(long) array[index + 7] & 0xff;
}
@Override
public ByteBuf setByte(int index, int value) {
ensureAccessible();
_setByte(index, value);
return this;
}
@Override
protected void _setByte(int index, int value) {
array[index] = (byte) value;
}
@Override
public ByteBuf setShort(int index, int value) {
ensureAccessible();
_setShort(index, value);
return this;
}
@Override
protected void _setShort(int index, int value) {
array[index] = (byte) (value >>> 8);
array[index + 1] = (byte) value;
}
@Override
public ByteBuf setMedium(int index, int value) {
ensureAccessible();
_setMedium(index, value);
return this;
}
@Override
protected void _setMedium(int index, int value) {
array[index] = (byte) (value >>> 16);
array[index + 1] = (byte) (value >>> 8);
array[index + 2] = (byte) value;
}
@Override
public ByteBuf setInt(int index, int value) {
ensureAccessible();
_setInt(index, value);
return this;
}
@Override
protected void _setInt(int index, int value) {
array[index] = (byte) (value >>> 24);
array[index + 1] = (byte) (value >>> 16);
array[index + 2] = (byte) (value >>> 8);
array[index + 3] = (byte) value;
}
@Override
public ByteBuf setLong(int index, long value) {
ensureAccessible();
_setLong(index, value);
return this;
}
@Override
protected void _setLong(int index, long value) {
array[index] = (byte) (value >>> 56);
array[index + 1] = (byte) (value >>> 48);
array[index + 2] = (byte) (value >>> 40);
array[index + 3] = (byte) (value >>> 32);
array[index + 4] = (byte) (value >>> 24);
array[index + 5] = (byte) (value >>> 16);
array[index + 6] = (byte) (value >>> 8);
array[index + 7] = (byte) value;
}
@Override
public ByteBuf copy(int index, int length) {
checkIndex(index, length);
byte[] copiedArray = new byte[length];
System.arraycopy(array, index, copiedArray, 0, length);
return new UnpooledHeapByteBuf(alloc(), copiedArray, maxCapacity());
}
private ByteBuffer internalNioBuffer() {
ByteBuffer tmpNioBuf = this.tmpNioBuf;
if (tmpNioBuf == null) {
this.tmpNioBuf = tmpNioBuf = ByteBuffer.wrap(array);
}
return tmpNioBuf;
}
@Override
protected void deallocate() {
array = null;
}
@Override
public ByteBuf unwrap() {
return null;
}
}
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