io.netty.buffer.ReadOnlyByteBuf 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).
/*
* 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 java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.ReadOnlyBufferException;
import java.nio.channels.GatheringByteChannel;
import java.nio.channels.ScatteringByteChannel;
/**
* A derived buffer which forbids any write requests to its parent. It is
* recommended to use {@link Unpooled#unmodifiableBuffer(ByteBuf)}
* instead of calling the constructor explicitly.
*/
public class ReadOnlyByteBuf extends AbstractDerivedByteBuf {
private final ByteBuf buffer;
public ReadOnlyByteBuf(ByteBuf buffer) {
super(buffer.maxCapacity());
if (buffer instanceof ReadOnlyByteBuf || buffer instanceof DuplicatedByteBuf) {
this.buffer = buffer.unwrap();
} else {
this.buffer = buffer;
}
setIndex(buffer.readerIndex(), buffer.writerIndex());
}
@Override
public boolean isWritable() {
return false;
}
@Override
public boolean isWritable(int numBytes) {
return false;
}
@Override
public ByteBuf unwrap() {
return buffer;
}
@Override
public ByteBufAllocator alloc() {
return buffer.alloc();
}
@Override
public ByteOrder order() {
return buffer.order();
}
@Override
public boolean isDirect() {
return buffer.isDirect();
}
@Override
public boolean hasArray() {
return false;
}
@Override
public byte[] array() {
throw new ReadOnlyBufferException();
}
@Override
public int arrayOffset() {
throw new ReadOnlyBufferException();
}
@Override
public boolean hasMemoryAddress() {
return false;
}
@Override
public long memoryAddress() {
throw new ReadOnlyBufferException();
}
@Override
public ByteBuf discardReadBytes() {
throw new ReadOnlyBufferException();
}
@Override
public ByteBuf setBytes(int index, ByteBuf src, int srcIndex, int length) {
throw new ReadOnlyBufferException();
}
@Override
public ByteBuf setBytes(int index, byte[] src, int srcIndex, int length) {
throw new ReadOnlyBufferException();
}
@Override
public ByteBuf setBytes(int index, ByteBuffer src) {
throw new ReadOnlyBufferException();
}
@Override
public ByteBuf setByte(int index, int value) {
throw new ReadOnlyBufferException();
}
@Override
protected void _setByte(int index, int value) {
throw new ReadOnlyBufferException();
}
@Override
public ByteBuf setShort(int index, int value) {
throw new ReadOnlyBufferException();
}
@Override
protected void _setShort(int index, int value) {
throw new ReadOnlyBufferException();
}
@Override
public ByteBuf setMedium(int index, int value) {
throw new ReadOnlyBufferException();
}
@Override
protected void _setMedium(int index, int value) {
throw new ReadOnlyBufferException();
}
@Override
public ByteBuf setInt(int index, int value) {
throw new ReadOnlyBufferException();
}
@Override
protected void _setInt(int index, int value) {
throw new ReadOnlyBufferException();
}
@Override
public ByteBuf setLong(int index, long value) {
throw new ReadOnlyBufferException();
}
@Override
protected void _setLong(int index, long value) {
throw new ReadOnlyBufferException();
}
@Override
public int setBytes(int index, InputStream in, int length) {
throw new ReadOnlyBufferException();
}
@Override
public int setBytes(int index, ScatteringByteChannel in, int length) {
throw new ReadOnlyBufferException();
}
@Override
public int getBytes(int index, GatheringByteChannel out, int length)
throws IOException {
return buffer.getBytes(index, out, length);
}
@Override
public ByteBuf getBytes(int index, OutputStream out, int length)
throws IOException {
buffer.getBytes(index, out, length);
return this;
}
@Override
public ByteBuf getBytes(int index, byte[] dst, int dstIndex, int length) {
buffer.getBytes(index, dst, dstIndex, length);
return this;
}
@Override
public ByteBuf getBytes(int index, ByteBuf dst, int dstIndex, int length) {
buffer.getBytes(index, dst, dstIndex, length);
return this;
}
@Override
public ByteBuf getBytes(int index, ByteBuffer dst) {
buffer.getBytes(index, dst);
return this;
}
@Override
public ByteBuf duplicate() {
return new ReadOnlyByteBuf(this);
}
@Override
public ByteBuf copy(int index, int length) {
return buffer.copy(index, length);
}
@Override
public ByteBuf slice(int index, int length) {
return Unpooled.unmodifiableBuffer(buffer.slice(index, length));
}
@Override
public byte getByte(int index) {
return _getByte(index);
}
@Override
protected byte _getByte(int index) {
return buffer.getByte(index);
}
@Override
public short getShort(int index) {
return _getShort(index);
}
@Override
protected short _getShort(int index) {
return buffer.getShort(index);
}
@Override
public int getUnsignedMedium(int index) {
return _getUnsignedMedium(index);
}
@Override
protected int _getUnsignedMedium(int index) {
return buffer.getUnsignedMedium(index);
}
@Override
public int getInt(int index) {
return _getInt(index);
}
@Override
protected int _getInt(int index) {
return buffer.getInt(index);
}
@Override
public long getLong(int index) {
return _getLong(index);
}
@Override
protected long _getLong(int index) {
return buffer.getLong(index);
}
@Override
public int nioBufferCount() {
return buffer.nioBufferCount();
}
@Override
public ByteBuffer nioBuffer(int index, int length) {
return buffer.nioBuffer(index, length).asReadOnlyBuffer();
}
@Override
public ByteBuffer[] nioBuffers(int index, int length) {
return buffer.nioBuffers(index, length);
}
@Override
public ByteBuffer internalNioBuffer(int index, int length) {
return nioBuffer(index, length);
}
@Override
public int forEachByte(int index, int length, ByteBufProcessor processor) {
return buffer.forEachByte(index, length, processor);
}
@Override
public int forEachByteDesc(int index, int length, ByteBufProcessor processor) {
return buffer.forEachByteDesc(index, length, processor);
}
@Override
public int capacity() {
return buffer.capacity();
}
@Override
public ByteBuf capacity(int newCapacity) {
throw new ReadOnlyBufferException();
}
}