/*
* Copyright 2013 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 info.jerrinot.nettyloc;
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;
final class PooledUnsafeDirectByteBuf extends PooledByteBuf<ByteBuffer> {
private static final boolean NATIVE_ORDER = ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN;
private static final Recycler<PooledUnsafeDirectByteBuf> RECYCLER = new Recycler<PooledUnsafeDirectByteBuf>() {
@Override
protected PooledUnsafeDirectByteBuf newObject(Handle handle) {
return new PooledUnsafeDirectByteBuf(handle);
}
};
static PooledUnsafeDirectByteBuf newInstance() {
PooledUnsafeDirectByteBuf buf = RECYCLER.get();
buf.setRefCnt(1);
return buf;
}
private long memoryAddress;
private PooledUnsafeDirectByteBuf(Recycler.Handle recyclerHandle) {
super(recyclerHandle);
}
@Override
void init(PoolChunk<ByteBuffer> chunk, long handle, int offset, int length, int maxLength) {
super.init(chunk, handle, offset, length, maxLength);
initMemoryAddress();
}
@Override
void initUnpooled(PoolChunk<ByteBuffer> chunk, int length) {
super.initUnpooled(chunk, length);
initMemoryAddress();
}
private void initMemoryAddress() {
memoryAddress = PlatformDependent.directBufferAddress(memory) + offset;
}
@Override
protected ByteBuffer newInternalNioBuffer(ByteBuffer memory) {
return memory.duplicate();
}
@Override
public ByteBuf getBytes(int index, byte[] dst, int dstIndex, int length) {
checkIndex(index, length);
if (dst == null) {
throw new NullPointerException("dst");
}
if (dstIndex < 0 || dstIndex > dst.length - length) {
throw new IndexOutOfBoundsException("dstIndex: " + dstIndex);
}
if (length != 0) {
PlatformDependent.copyMemory(addr(index), dst, dstIndex, length);
}
return this;
}
@Override
public ByteBuf getBytes(int index, OutputStream out, int length) throws IOException {
checkIndex(index, length);
if (length != 0) {
byte[] tmp = new byte[length];
PlatformDependent.copyMemory(addr(index), tmp, 0, length);
out.write(tmp);
}
return this;
}
@Override
public int getBytes(int index, GatheringByteChannel out, int length) throws IOException {
return getBytes(index, out, length, false);
}
private int getBytes(int index, GatheringByteChannel out, int length, boolean internal) throws IOException {
checkIndex(index, length);
if (length == 0) {
return 0;
}
ByteBuffer tmpBuf;
if (internal) {
tmpBuf = internalNioBuffer();
} else {
tmpBuf = memory.duplicate();
}
index = idx(index);
tmpBuf.clear().position(index).limit(index + length);
return out.write(tmpBuf);
}
@Override
public ByteBuf setBytes(int index, byte[] src, int srcIndex, int length) {
checkIndex(index, length);
if (length != 0) {
PlatformDependent.copyMemory(src, srcIndex, addr(index), 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) {
PlatformDependent.copyMemory(tmp, 0, addr(index), readBytes);
}
return readBytes;
}
@Override
public int setBytes(int index, ScatteringByteChannel in, int length) throws IOException {
checkIndex(index, length);
ByteBuffer tmpBuf = internalNioBuffer();
index = idx(index);
tmpBuf.clear().position(index).limit(index + length);
try {
return in.read(tmpBuf);
} catch (ClosedChannelException e) {
return -1;
}
}
@Override
public int nioBufferCount() {
return 1;
}
@Override
public ByteBuffer[] nioBuffers(int index, int length) {
return new ByteBuffer[] { nioBuffer(index, length) };
}
@Override
public ByteBuffer nioBuffer(int index, int length) {
checkIndex(index, length);
index = idx(index);
return (ByteBuffer) memory.duplicate().position(index).limit(index + length);
}
private long addr(int index) {
return memoryAddress + index;
}
@Override
protected Recycler<?> recycler() {
return RECYCLER;
}
}