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io.netty.buffer.PooledDirectByteBuf Maven / Gradle / Ivy
/*
* 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.channels.ClosedChannelException;
import java.nio.channels.GatheringByteChannel;
import java.nio.channels.ScatteringByteChannel;
final class PooledDirectByteBuf extends PooledByteBuf {
PooledDirectByteBuf(int maxCapacity) {
super(maxCapacity);
}
@Override
protected ByteBuffer newInternalNioBuffer(ByteBuffer memory) {
return memory.duplicate();
}
@Override
public boolean isDirect() {
return true;
}
@Override
protected byte _getByte(int index) {
return memory.get(idx(index));
}
@Override
protected short _getShort(int index) {
return memory.getShort(idx(index));
}
@Override
protected int _getUnsignedMedium(int index) {
index = idx(index);
return (memory.get(index) & 0xff) << 16 | (memory.get(index + 1) & 0xff) << 8 | memory.get(index + 2) & 0xff;
}
@Override
protected int _getInt(int index) {
return memory.getInt(idx(index));
}
@Override
protected long _getLong(int index) {
return memory.getLong(idx(index));
}
@Override
public ByteBuf getBytes(int index, ByteBuf dst, int dstIndex, int length) {
checkDstIndex(index, length, dstIndex, dst.capacity());
if (dst.hasArray()) {
getBytes(index, dst.array(), dst.arrayOffset() + dstIndex, length);
} else if (dst.nioBufferCount() > 0) {
for (ByteBuffer bb: dst.nioBuffers(dstIndex, length)) {
int bbLen = bb.remaining();
getBytes(index, bb);
index += bbLen;
}
} else {
dst.setBytes(dstIndex, this, index, length);
}
return this;
}
@Override
public ByteBuf getBytes(int index, byte[] dst, int dstIndex, int length) {
checkDstIndex(index, length, dstIndex, dst.length);
ByteBuffer tmpBuf = internalNioBuffer();
index = idx(index);
tmpBuf.clear().position(index).limit(index + length);
tmpBuf.get(dst, dstIndex, length);
return this;
}
@Override
public ByteBuf getBytes(int index, ByteBuffer dst) {
checkIndex(index);
int bytesToCopy = Math.min(capacity() - index, dst.remaining());
ByteBuffer tmpBuf = internalNioBuffer();
index = idx(index);
tmpBuf.clear().position(index).limit(index + bytesToCopy);
dst.put(tmpBuf);
return this;
}
@Override
public ByteBuf getBytes(int index, OutputStream out, int length) throws IOException {
checkIndex(index, length);
if (length == 0) {
return this;
}
byte[] tmp = new byte[length];
ByteBuffer tmpBuf = internalNioBuffer();
tmpBuf.clear().position(idx(index));
tmpBuf.get(tmp);
out.write(tmp);
return this;
}
@Override
public int getBytes(int index, GatheringByteChannel out, int length) throws IOException {
checkIndex(index, length);
if (length == 0) {
return 0;
}
ByteBuffer tmpBuf = internalNioBuffer();
index = idx(index);
tmpBuf.clear().position(index).limit(index + length);
return out.write(tmpBuf);
}
@Override
protected void _setByte(int index, int value) {
memory.put(idx(index), (byte) value);
}
@Override
protected void _setShort(int index, int value) {
memory.putShort(idx(index), (short) value);
}
@Override
protected void _setMedium(int index, int value) {
index = idx(index);
memory.put(index, (byte) (value >>> 16));
memory.put(index + 1, (byte) (value >>> 8));
memory.put(index + 2, (byte) value);
}
@Override
protected void _setInt(int index, int value) {
memory.putInt(idx(index), value);
}
@Override
protected void _setLong(int index, long value) {
memory.putLong(idx(index), value);
}
@Override
public ByteBuf setBytes(int index, ByteBuf src, int srcIndex, int length) {
checkSrcIndex(index, length, srcIndex, src.capacity());
if (src.hasArray()) {
setBytes(index, src.array(), src.arrayOffset() + srcIndex, length);
} else if (src.nioBufferCount() > 0) {
for (ByteBuffer bb: src.nioBuffers(srcIndex, length)) {
int bbLen = bb.remaining();
setBytes(index, bb);
index += bbLen;
}
} else {
src.getBytes(srcIndex, this, index, length);
}
return this;
}
@Override
public ByteBuf setBytes(int index, byte[] src, int srcIndex, int length) {
checkSrcIndex(index, length, srcIndex, src.length);
ByteBuffer tmpBuf = internalNioBuffer();
index = idx(index);
tmpBuf.clear().position(index).limit(index + length);
tmpBuf.put(src, srcIndex, length);
return this;
}
@Override
public ByteBuf setBytes(int index, ByteBuffer src) {
checkIndex(index);
ByteBuffer tmpBuf = internalNioBuffer();
if (src == tmpBuf) {
src = src.duplicate();
}
index = idx(index);
tmpBuf.clear().position(index).limit(index + src.remaining());
tmpBuf.put(src);
return this;
}
@Override
public int setBytes(int index, InputStream in, int length) throws IOException {
checkIndex(index, length);
byte[] tmp = new byte[length];
int readBytes = in.read(tmp);
if (readBytes <= 0) {
return readBytes;
}
ByteBuffer tmpNioBuf = internalNioBuffer();
tmpNioBuf.clear().position(idx(index));
tmpNioBuf.put(tmp, 0, readBytes);
return readBytes;
}
@Override
public int setBytes(int index, ScatteringByteChannel in, int length) throws IOException {
checkIndex(index, length);
ByteBuffer tmpNioBuf = internalNioBuffer();
index = idx(index);
tmpNioBuf.clear().position(index).limit(index + length);
try {
return in.read(tmpNioBuf);
} catch (ClosedChannelException e) {
return -1;
}
}
@Override
public ByteBuf copy(int index, int length) {
checkIndex(index, length);
ByteBuf copy = alloc().directBuffer(length, maxCapacity());
copy.writeBytes(this, index, length);
return copy;
}
@Override
public int nioBufferCount() {
return 1;
}
@Override
public ByteBuffer nioBuffer(int index, int length) {
checkIndex(index, length);
index = idx(index);
return ((ByteBuffer) internalNioBuffer().clear().position(index).limit(index + length)).slice();
}
@Override
public ByteBuffer[] nioBuffers(int index, int length) {
return new ByteBuffer[] { nioBuffer(index, length) };
}
@Override
public boolean hasArray() {
return false;
}
@Override
public byte[] array() {
throw new UnsupportedOperationException("direct buffer");
}
@Override
public int arrayOffset() {
throw new UnsupportedOperationException("direct buffer");
}
@Override
public boolean hasMemoryAddress() {
return false;
}
@Override
public long memoryAddress() {
throw new UnsupportedOperationException();
}
}
