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JDBC Driver for Google Cloud Spanner
/*
* 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 nl.topicus.jdbc.shaded.io.netty.buffer;
import nl.topicus.jdbc.shaded.io.netty.util.Recycler;
import nl.topicus.jdbc.shaded.io.netty.util.internal.PlatformDependent;
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.FileChannel;
import java.nio.channels.GatheringByteChannel;
import java.nio.channels.ScatteringByteChannel;
final class PooledUnsafeDirectByteBuf extends PooledByteBuf {
private static final Recycler RECYCLER = new Recycler() {
@Override
protected PooledUnsafeDirectByteBuf newObject(Handle handle) {
return new PooledUnsafeDirectByteBuf(handle, 0);
}
};
static PooledUnsafeDirectByteBuf newInstance(int maxCapacity) {
PooledUnsafeDirectByteBuf buf = RECYCLER.get();
buf.reuse(maxCapacity);
return buf;
}
private long memoryAddress;
private PooledUnsafeDirectByteBuf(Recycler.Handle recyclerHandle, int maxCapacity) {
super(recyclerHandle, maxCapacity);
}
@Override
void init(PoolChunk chunk, long handle, int offset, int length, int maxLength,
PoolThreadCache cache) {
super.init(chunk, handle, offset, length, maxLength, cache);
initMemoryAddress();
}
@Override
void initUnpooled(PoolChunk 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 boolean isDirect() {
return true;
}
@Override
protected byte _getByte(int index) {
return UnsafeByteBufUtil.getByte(addr(index));
}
@Override
protected short _getShort(int index) {
return UnsafeByteBufUtil.getShort(addr(index));
}
@Override
protected short _getShortLE(int index) {
return UnsafeByteBufUtil.getShortLE(addr(index));
}
@Override
protected int _getUnsignedMedium(int index) {
return UnsafeByteBufUtil.getUnsignedMedium(addr(index));
}
@Override
protected int _getUnsignedMediumLE(int index) {
return UnsafeByteBufUtil.getUnsignedMediumLE(addr(index));
}
@Override
protected int _getInt(int index) {
return UnsafeByteBufUtil.getInt(addr(index));
}
@Override
protected int _getIntLE(int index) {
return UnsafeByteBufUtil.getIntLE(addr(index));
}
@Override
protected long _getLong(int index) {
return UnsafeByteBufUtil.getLong(addr(index));
}
@Override
protected long _getLongLE(int index) {
return UnsafeByteBufUtil.getLongLE(addr(index));
}
@Override
public ByteBuf getBytes(int index, ByteBuf dst, int dstIndex, int length) {
UnsafeByteBufUtil.getBytes(this, addr(index), index, dst, dstIndex, length);
return this;
}
@Override
public ByteBuf getBytes(int index, byte[] dst, int dstIndex, int length) {
UnsafeByteBufUtil.getBytes(this, addr(index), index, dst, dstIndex, length);
return this;
}
@Override
public ByteBuf getBytes(int index, ByteBuffer dst) {
UnsafeByteBufUtil.getBytes(this, addr(index), index, dst);
return this;
}
@Override
public ByteBuf readBytes(ByteBuffer dst) {
int length = dst.remaining();
checkReadableBytes(length);
getBytes(readerIndex, dst);
readerIndex += length;
return this;
}
@Override
public ByteBuf getBytes(int index, OutputStream out, int length) throws IOException {
UnsafeByteBufUtil.getBytes(this, addr(index), index, out, length);
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 int getBytes(int index, FileChannel out, long position, int length) throws IOException {
return getBytes(index, out, position, length, false);
}
private int getBytes(int index, FileChannel out, long position, int length, boolean internal) throws IOException {
checkIndex(index, length);
if (length == 0) {
return 0;
}
ByteBuffer tmpBuf = internal ? internalNioBuffer() : memory.duplicate();
index = idx(index);
tmpBuf.clear().position(index).limit(index + length);
return out.write(tmpBuf, position);
}
@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 int readBytes(FileChannel out, long position, int length)
throws IOException {
checkReadableBytes(length);
int readBytes = getBytes(readerIndex, out, position, length, true);
readerIndex += readBytes;
return readBytes;
}
@Override
protected void _setByte(int index, int value) {
UnsafeByteBufUtil.setByte(addr(index), (byte) value);
}
@Override
protected void _setShort(int index, int value) {
UnsafeByteBufUtil.setShort(addr(index), value);
}
@Override
protected void _setShortLE(int index, int value) {
UnsafeByteBufUtil.setShortLE(addr(index), value);
}
@Override
protected void _setMedium(int index, int value) {
UnsafeByteBufUtil.setMedium(addr(index), value);
}
@Override
protected void _setMediumLE(int index, int value) {
UnsafeByteBufUtil.setMediumLE(addr(index), value);
}
@Override
protected void _setInt(int index, int value) {
UnsafeByteBufUtil.setInt(addr(index), value);
}
@Override
protected void _setIntLE(int index, int value) {
UnsafeByteBufUtil.setIntLE(addr(index), value);
}
@Override
protected void _setLong(int index, long value) {
UnsafeByteBufUtil.setLong(addr(index), value);
}
@Override
protected void _setLongLE(int index, long value) {
UnsafeByteBufUtil.setLongLE(addr(index), value);
}
@Override
public ByteBuf setBytes(int index, ByteBuf src, int srcIndex, int length) {
UnsafeByteBufUtil.setBytes(this, addr(index), index, src, srcIndex, length);
return this;
}
@Override
public ByteBuf setBytes(int index, byte[] src, int srcIndex, int length) {
UnsafeByteBufUtil.setBytes(this, addr(index), index, src, srcIndex, length);
return this;
}
@Override
public ByteBuf setBytes(int index, ByteBuffer src) {
UnsafeByteBufUtil.setBytes(this, addr(index), index, src);
return this;
}
@Override
public int setBytes(int index, InputStream in, int length) throws IOException {
return UnsafeByteBufUtil.setBytes(this, addr(index), index, in, length);
}
@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 ignored) {
return -1;
}
}
@Override
public int setBytes(int index, FileChannel in, long position, 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, position);
} catch (ClosedChannelException ignored) {
return -1;
}
}
@Override
public ByteBuf copy(int index, int length) {
return UnsafeByteBufUtil.copy(this, addr(index), index, length);
}
@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)).slice();
}
@Override
public ByteBuffer internalNioBuffer(int index, int length) {
checkIndex(index, length);
index = idx(index);
return (ByteBuffer) internalNioBuffer().clear().position(index).limit(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 true;
}
@Override
public long memoryAddress() {
ensureAccessible();
return memoryAddress;
}
private long addr(int index) {
return memoryAddress + index;
}
@Override
protected SwappedByteBuf newSwappedByteBuf() {
if (PlatformDependent.isUnaligned()) {
// Only use if unaligned access is supported otherwise there is no gain.
return new UnsafeDirectSwappedByteBuf(this);
}
return super.newSwappedByteBuf();
}
@Override
public ByteBuf setZero(int index, int length) {
checkIndex(index, length);
UnsafeByteBufUtil.setZero(addr(index), length);
return this;
}
@Override
public ByteBuf writeZero(int length) {
ensureWritable(length);
int wIndex = writerIndex;
UnsafeByteBufUtil.setZero(addr(wIndex), length);
writerIndex = wIndex + length;
return this;
}
}