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io.netty.buffer.AbstractUnpooledSlicedByteBuf Maven / Gradle / Ivy
/*
* Copyright 2016 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.ByteProcessor;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.channels.FileChannel;
import java.nio.channels.GatheringByteChannel;
import java.nio.channels.ScatteringByteChannel;
import java.nio.charset.Charset;
import static io.netty.util.internal.MathUtil.isOutOfBounds;
abstract class AbstractUnpooledSlicedByteBuf extends AbstractDerivedByteBuf {
private final ByteBuf buffer;
private final int adjustment;
AbstractUnpooledSlicedByteBuf(ByteBuf buffer, int index, int length) {
super(length);
checkSliceOutOfBounds(index, length, buffer);
if (buffer instanceof AbstractUnpooledSlicedByteBuf) {
this.buffer = ((AbstractUnpooledSlicedByteBuf) buffer).buffer;
adjustment = ((AbstractUnpooledSlicedByteBuf) buffer).adjustment + index;
} else if (buffer instanceof DuplicatedByteBuf) {
this.buffer = buffer.unwrap();
adjustment = index;
} else {
this.buffer = buffer;
adjustment = index;
}
initLength(length);
writerIndex(length);
}
/**
* Called by the constructor before {@link #writerIndex(int)}.
* @param length the {@code length} argument from the constructor.
*/
void initLength(int length) {
}
int length() {
return capacity();
}
@Override
public ByteBuf unwrap() {
return buffer;
}
@Override
public ByteBufAllocator alloc() {
return unwrap().alloc();
}
@Override
@Deprecated
public ByteOrder order() {
return unwrap().order();
}
@Override
public boolean isDirect() {
return unwrap().isDirect();
}
@Override
public ByteBuf capacity(int newCapacity) {
throw new UnsupportedOperationException("sliced buffer");
}
@Override
public boolean hasArray() {
return unwrap().hasArray();
}
@Override
public byte[] array() {
return unwrap().array();
}
@Override
public int arrayOffset() {
return idx(unwrap().arrayOffset());
}
@Override
public boolean hasMemoryAddress() {
return unwrap().hasMemoryAddress();
}
@Override
public long memoryAddress() {
return unwrap().memoryAddress() + adjustment;
}
@Override
public byte getByte(int index) {
checkIndex0(index, 1);
return unwrap().getByte(idx(index));
}
@Override
protected byte _getByte(int index) {
return unwrap().getByte(idx(index));
}
@Override
public short getShort(int index) {
checkIndex0(index, 2);
return unwrap().getShort(idx(index));
}
@Override
protected short _getShort(int index) {
return unwrap().getShort(idx(index));
}
@Override
public short getShortLE(int index) {
checkIndex0(index, 2);
return unwrap().getShortLE(idx(index));
}
@Override
protected short _getShortLE(int index) {
return unwrap().getShortLE(idx(index));
}
@Override
public int getUnsignedMedium(int index) {
checkIndex0(index, 3);
return unwrap().getUnsignedMedium(idx(index));
}
@Override
protected int _getUnsignedMedium(int index) {
return unwrap().getUnsignedMedium(idx(index));
}
@Override
public int getUnsignedMediumLE(int index) {
checkIndex0(index, 3);
return unwrap().getUnsignedMediumLE(idx(index));
}
@Override
protected int _getUnsignedMediumLE(int index) {
return unwrap().getUnsignedMediumLE(idx(index));
}
@Override
public int getInt(int index) {
checkIndex0(index, 4);
return unwrap().getInt(idx(index));
}
@Override
protected int _getInt(int index) {
return unwrap().getInt(idx(index));
}
@Override
public int getIntLE(int index) {
checkIndex0(index, 4);
return unwrap().getIntLE(idx(index));
}
@Override
protected int _getIntLE(int index) {
return unwrap().getIntLE(idx(index));
}
@Override
public long getLong(int index) {
checkIndex0(index, 8);
return unwrap().getLong(idx(index));
}
@Override
protected long _getLong(int index) {
return unwrap().getLong(idx(index));
}
@Override
public long getLongLE(int index) {
checkIndex0(index, 8);
return unwrap().getLongLE(idx(index));
}
@Override
protected long _getLongLE(int index) {
return unwrap().getLongLE(idx(index));
}
@Override
public ByteBuf duplicate() {
return unwrap().duplicate().setIndex(idx(readerIndex()), idx(writerIndex()));
}
@Override
public ByteBuf copy(int index, int length) {
checkIndex0(index, length);
return unwrap().copy(idx(index), length);
}
@Override
public ByteBuf slice(int index, int length) {
checkIndex0(index, length);
return unwrap().slice(idx(index), length);
}
@Override
public ByteBuf getBytes(int index, ByteBuf dst, int dstIndex, int length) {
checkIndex0(index, length);
unwrap().getBytes(idx(index), dst, dstIndex, length);
return this;
}
@Override
public ByteBuf getBytes(int index, byte[] dst, int dstIndex, int length) {
checkIndex0(index, length);
unwrap().getBytes(idx(index), dst, dstIndex, length);
return this;
}
@Override
public ByteBuf getBytes(int index, ByteBuffer dst) {
checkIndex0(index, dst.remaining());
unwrap().getBytes(idx(index), dst);
return this;
}
@Override
public ByteBuf setByte(int index, int value) {
checkIndex0(index, 1);
unwrap().setByte(idx(index), value);
return this;
}
@Override
public CharSequence getCharSequence(int index, int length, Charset charset) {
checkIndex0(index, length);
return unwrap().getCharSequence(idx(index), length, charset);
}
@Override
protected void _setByte(int index, int value) {
unwrap().setByte(idx(index), value);
}
@Override
public ByteBuf setShort(int index, int value) {
checkIndex0(index, 2);
unwrap().setShort(idx(index), value);
return this;
}
@Override
protected void _setShort(int index, int value) {
unwrap().setShort(idx(index), value);
}
@Override
public ByteBuf setShortLE(int index, int value) {
checkIndex0(index, 2);
unwrap().setShortLE(idx(index), value);
return this;
}
@Override
protected void _setShortLE(int index, int value) {
unwrap().setShortLE(idx(index), value);
}
@Override
public ByteBuf setMedium(int index, int value) {
checkIndex0(index, 3);
unwrap().setMedium(idx(index), value);
return this;
}
@Override
protected void _setMedium(int index, int value) {
unwrap().setMedium(idx(index), value);
}
@Override
public ByteBuf setMediumLE(int index, int value) {
checkIndex0(index, 3);
unwrap().setMediumLE(idx(index), value);
return this;
}
@Override
protected void _setMediumLE(int index, int value) {
unwrap().setMediumLE(idx(index), value);
}
@Override
public ByteBuf setInt(int index, int value) {
checkIndex0(index, 4);
unwrap().setInt(idx(index), value);
return this;
}
@Override
protected void _setInt(int index, int value) {
unwrap().setInt(idx(index), value);
}
@Override
public ByteBuf setIntLE(int index, int value) {
checkIndex0(index, 4);
unwrap().setIntLE(idx(index), value);
return this;
}
@Override
protected void _setIntLE(int index, int value) {
unwrap().setIntLE(idx(index), value);
}
@Override
public ByteBuf setLong(int index, long value) {
checkIndex0(index, 8);
unwrap().setLong(idx(index), value);
return this;
}
@Override
protected void _setLong(int index, long value) {
unwrap().setLong(idx(index), value);
}
@Override
public ByteBuf setLongLE(int index, long value) {
checkIndex0(index, 8);
unwrap().setLongLE(idx(index), value);
return this;
}
@Override
protected void _setLongLE(int index, long value) {
unwrap().setLongLE(idx(index), value);
}
@Override
public ByteBuf setBytes(int index, byte[] src, int srcIndex, int length) {
checkIndex0(index, length);
unwrap().setBytes(idx(index), src, srcIndex, length);
return this;
}
@Override
public ByteBuf setBytes(int index, ByteBuf src, int srcIndex, int length) {
checkIndex0(index, length);
unwrap().setBytes(idx(index), src, srcIndex, length);
return this;
}
@Override
public ByteBuf setBytes(int index, ByteBuffer src) {
checkIndex0(index, src.remaining());
unwrap().setBytes(idx(index), src);
return this;
}
@Override
public ByteBuf getBytes(int index, OutputStream out, int length) throws IOException {
checkIndex0(index, length);
unwrap().getBytes(idx(index), out, length);
return this;
}
@Override
public int getBytes(int index, GatheringByteChannel out, int length) throws IOException {
checkIndex0(index, length);
return unwrap().getBytes(idx(index), out, length);
}
@Override
public int getBytes(int index, FileChannel out, long position, int length) throws IOException {
checkIndex0(index, length);
return unwrap().getBytes(idx(index), out, position, length);
}
@Override
public int setBytes(int index, InputStream in, int length) throws IOException {
checkIndex0(index, length);
return unwrap().setBytes(idx(index), in, length);
}
@Override
public int setBytes(int index, ScatteringByteChannel in, int length) throws IOException {
checkIndex0(index, length);
return unwrap().setBytes(idx(index), in, length);
}
@Override
public int setBytes(int index, FileChannel in, long position, int length) throws IOException {
checkIndex0(index, length);
return unwrap().setBytes(idx(index), in, position, length);
}
@Override
public int nioBufferCount() {
return unwrap().nioBufferCount();
}
@Override
public ByteBuffer nioBuffer(int index, int length) {
checkIndex0(index, length);
return unwrap().nioBuffer(idx(index), length);
}
@Override
public ByteBuffer[] nioBuffers(int index, int length) {
checkIndex0(index, length);
return unwrap().nioBuffers(idx(index), length);
}
@Override
public int forEachByte(int index, int length, ByteProcessor processor) {
checkIndex0(index, length);
int ret = unwrap().forEachByte(idx(index), length, processor);
if (ret >= adjustment) {
return ret - adjustment;
} else {
return -1;
}
}
@Override
public int forEachByteDesc(int index, int length, ByteProcessor processor) {
checkIndex0(index, length);
int ret = unwrap().forEachByteDesc(idx(index), length, processor);
if (ret >= adjustment) {
return ret - adjustment;
} else {
return -1;
}
}
/**
* Returns the index with the needed adjustment.
*/
final int idx(int index) {
return index + adjustment;
}
static void checkSliceOutOfBounds(int index, int length, ByteBuf buffer) {
if (isOutOfBounds(index, length, buffer.capacity())) {
throw new IndexOutOfBoundsException(buffer + ".slice(" + index + ", " + length + ')');
}
}
}
