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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2008-2015 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
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*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
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*/
package org.glassfish.grizzly.memory;
import java.nio.BufferOverflowException;
import java.nio.BufferUnderflowException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.charset.Charset;
import org.glassfish.grizzly.Buffer;
/**
* {@link Buffer} implementation, which uses the {@link ByteBuffer} underneath.
*
* @see Buffer
* @see MemoryManager
* @see ByteBuffer
*
* @author Ken Cavanaugh
* @author John Vieten
* @author Alexey Stashok
*/
public class ByteBufferWrapper implements Buffer {
public static volatile boolean DEBUG_MODE = false;
protected ByteBuffer visible;
// Dispose underlying Buffer flag
protected boolean allowBufferDispose = false;
protected Exception disposeStackTrace;
protected ByteBufferWrapper() {
this(null);
}
public ByteBufferWrapper(final ByteBuffer underlyingByteBuffer) {
visible = underlyingByteBuffer;
}
@Override
public final boolean isComposite() {
return false;
}
@Override
public ByteBufferWrapper prepend(final Buffer header) {
checkDispose();
return this;
}
@Override
public void trim() {
checkDispose() ;
flip();
}
@Override
public void shrink() {
checkDispose();
}
@Override
public boolean isDirect() {
checkDispose();
return visible.isDirect();
}
@Override
public final boolean allowBufferDispose() {
return allowBufferDispose;
}
@Override
public final void allowBufferDispose(boolean allowBufferDispose) {
this.allowBufferDispose = allowBufferDispose;
}
@Override
public final boolean tryDispose() {
if (allowBufferDispose) {
dispose();
return true;
}
return false;
}
@Override
public void dispose() {
prepareDispose();
visible = null;
}
protected final void prepareDispose() {
checkDispose();
if (DEBUG_MODE) { // if debug is on - clear the buffer content
// Use static logic class to help JIT optimize the code
DebugLogic.doDebug(this);
}
}
@Override
public ByteBuffer underlying() {
checkDispose();
return visible;
}
@Override
public final int capacity() {
return visible.capacity();
}
@Override
public final int position() {
checkDispose();
return visible.position();
}
@Override
public final ByteBufferWrapper position(final int newPosition) {
checkDispose();
visible.position(newPosition);
return this;
}
@Override
public final int limit() {
checkDispose();
return visible.limit();
}
@Override
public final ByteBufferWrapper limit(final int newLimit) {
checkDispose();
visible.limit(newLimit);
return this;
}
@Override
public final ByteBufferWrapper mark() {
checkDispose();
visible.mark();
return this;
}
@Override
public final ByteBufferWrapper reset() {
checkDispose();
visible.reset();
return this;
}
@Override
public final ByteBufferWrapper clear() {
checkDispose();
visible.clear();
return this;
}
@Override
public final ByteBufferWrapper flip() {
checkDispose();
visible.flip();
return this;
}
@Override
public final ByteBufferWrapper rewind() {
checkDispose();
visible.rewind();
return this;
}
@Override
public final int remaining() {
checkDispose();
return visible.remaining();
}
@Override
public final boolean hasRemaining() {
checkDispose();
return visible.hasRemaining();
}
@Override
public boolean isReadOnly() {
checkDispose();
return visible.isReadOnly();
}
@Override
public Buffer split(final int splitPosition) {
checkDispose();
final int cap = capacity();
if (splitPosition < 0 || splitPosition > cap) {
throw new IllegalArgumentException("Invalid splitPosition value, should be 0 <= splitPosition <= capacity");
}
if (splitPosition == cap) {
return Buffers.EMPTY_BUFFER;
}
final int oldPosition = position();
final int oldLimit = limit();
Buffers.setPositionLimit(visible, 0, splitPosition);
ByteBuffer slice1 = visible.slice();
Buffers.setPositionLimit(visible, splitPosition, visible.capacity());
ByteBuffer slice2 = visible.slice();
if (oldPosition < splitPosition) {
slice1.position(oldPosition);
} else {
slice1.position(slice1.capacity());
slice2.position(oldPosition - splitPosition);
}
if (oldLimit < splitPosition) {
slice1.limit(oldLimit);
slice2.limit(0);
} else {
slice2.limit(oldLimit - splitPosition);
}
this.visible = slice1;
return wrapByteBuffer(slice2);
// return memoryManager.wrap(slice2);
}
@Override
public ByteBufferWrapper slice() {
return slice(position(), limit());
}
@Override
public ByteBufferWrapper slice(int position, int limit) {
checkDispose();
final int oldPosition = position();
final int oldLimit = limit();
try {
Buffers.setPositionLimit(visible, position, limit);
final ByteBuffer slice = visible.slice();
return wrapByteBuffer(slice);
} finally {
Buffers.setPositionLimit(visible, oldPosition, oldLimit);
}
}
@Override
public ByteBufferWrapper duplicate() {
checkDispose();
final ByteBuffer duplicate = visible.duplicate();
return wrapByteBuffer(duplicate);
}
@Override
public ByteBufferWrapper asReadOnlyBuffer() {
checkDispose();
return wrapByteBuffer(visible.asReadOnlyBuffer());
}
@Override
public byte get() {
checkDispose();
return visible.get();
}
@Override
public byte get(int index) {
checkDispose();
return visible.get(index);
}
@Override
public ByteBufferWrapper put(byte b) {
checkDispose();
visible.put(b);
return this;
}
@Override
public ByteBufferWrapper put(int index, byte b) {
checkDispose();
visible.put(index, b);
return this;
}
@Override
public ByteBufferWrapper get(final byte[] dst) {
return get(dst, 0, dst.length);
}
@Override
public ByteBufferWrapper get(final byte[] dst, final int offset, final int length) {
checkDispose();
Buffers.get(visible, dst, offset, length);
return this;
}
@Override
public ByteBufferWrapper put(final Buffer src) {
put(src, src.position(), src.remaining());
src.position(src.limit());
return this;
}
@Override
public ByteBufferWrapper put(final Buffer src, final int position, final int length) {
final int oldPos = src.position();
final int oldLim = limit();
src.position(position);
limit(position() + length);
try {
src.get(visible);
} finally {
src.position(oldPos);
limit(oldLim);
}
return this;
}
@Override
public Buffer get(final ByteBuffer dst) {
checkDispose();
final int length = dst.remaining();
if (visible.remaining() < length) {
throw new BufferUnderflowException();
}
final int srcPos = visible.position();
final int oldSrcLim = visible.limit();
try {
visible.limit(srcPos + length);
dst.put(visible);
} finally {
visible.limit(oldSrcLim);
}
return this;
}
@Override
public Buffer get(final ByteBuffer dst, final int position, final int length) {
checkDispose();
if (visible.remaining() < length) {
throw new BufferUnderflowException();
}
final int srcPos = visible.position();
final int oldSrcLim = visible.limit();
final int oldDstPos = dst.position();
final int oldDstLim = dst.limit();
Buffers.setPositionLimit(dst, position, position + length);
try {
visible.limit(srcPos + length);
dst.put(visible);
} finally {
visible.limit(oldSrcLim);
Buffers.setPositionLimit(dst, oldDstPos, oldDstLim);
}
return this;
}
@Override
public Buffer put(final ByteBuffer src) {
checkDispose();
visible.put(src);
return this;
}
@Override
public Buffer put(final ByteBuffer src, final int position, final int length) {
checkDispose();
final int oldPos = src.position();
final int oldLim = src.limit();
try {
Buffers.setPositionLimit(src, position, position + length);
visible.put(src);
} finally {
Buffers.setPositionLimit(src, oldPos, oldLim);
}
return this;
}
@Override
public ByteBufferWrapper put(byte[] src) {
return put(src, 0, src.length);
}
@Override
public ByteBufferWrapper put(byte[] src, int offset, int length) {
checkDispose();
Buffers.put(src, offset, length, visible);
return this;
}
@SuppressWarnings("deprecation")
@Override
public Buffer put8BitString(final String s) {
checkDispose();
final int len = s.length();
if (remaining() < len) {
throw new BufferOverflowException();
}
for (int i = 0; i < len; i++) {
visible.put((byte) s.charAt(i));
}
return this;
}
@Override
public ByteBufferWrapper compact() {
checkDispose();
visible.compact();
return this;
}
@Override
public ByteOrder order() {
checkDispose();
return visible.order();
}
@Override
public ByteBufferWrapper order(ByteOrder bo) {
checkDispose();
visible.order(bo);
return this;
}
@Override
public char getChar() {
checkDispose();
return visible.getChar();
}
@Override
public char getChar(int index) {
checkDispose();
return visible.getChar(index);
}
@Override
public ByteBufferWrapper putChar(char value) {
checkDispose();
visible.putChar(value);
return this;
}
@Override
public ByteBufferWrapper putChar(int index, char value) {
checkDispose();
visible.putChar(index, value);
return this;
}
@Override
public short getShort() {
checkDispose();
return visible.getShort();
}
@Override
public short getShort(int index) {
checkDispose();
return visible.getShort(index);
}
@Override
public ByteBufferWrapper putShort(short value) {
checkDispose();
visible.putShort(value);
return this;
}
@Override
public ByteBufferWrapper putShort(int index, short value) {
checkDispose();
visible.putShort(index, value);
return this;
}
@Override
public int getInt() {
checkDispose();
return visible.getInt();
}
@Override
public int getInt(int index) {
checkDispose();
return visible.getInt(index);
}
@Override
public ByteBufferWrapper putInt(int value) {
checkDispose();
visible.putInt(value);
return this;
}
@Override
public ByteBufferWrapper putInt(int index, int value) {
checkDispose();
visible.putInt(index, value);
return this;
}
@Override
public long getLong() {
checkDispose();
return visible.getLong();
}
@Override
public long getLong(int index) {
checkDispose();
return visible.getLong(index);
}
@Override
public ByteBufferWrapper putLong(long value) {
checkDispose();
visible.putLong(value);
return this;
}
@Override
public ByteBufferWrapper putLong(int index, long value) {
checkDispose();
visible.putLong(index, value);
return this;
}
@Override
public float getFloat() {
checkDispose();
return visible.getFloat();
}
@Override
public float getFloat(int index) {
checkDispose();
return visible.getFloat(index);
}
@Override
public ByteBufferWrapper putFloat(float value) {
checkDispose();
visible.putFloat(value);
return this;
}
@Override
public ByteBufferWrapper putFloat(int index, float value) {
checkDispose();
visible.putFloat(index, value);
return this;
}
@Override
public double getDouble() {
checkDispose();
return visible.getDouble();
}
@Override
public double getDouble(int index) {
checkDispose();
return visible.getDouble(index);
}
@Override
public ByteBufferWrapper putDouble(double value) {
checkDispose();
visible.putDouble(value);
return this;
}
@Override
public ByteBufferWrapper putDouble(int index, double value) {
checkDispose();
visible.putDouble(index, value);
return this;
}
@Override
public int hashCode() {
return visible.hashCode();
}
@Override
public boolean equals(Object obj) {
if (obj instanceof Buffer) {
Buffer that = (Buffer) obj;
if (this.remaining() != that.remaining()) {
return false;
}
int p = this.position();
for (int i = this.limit() - 1, j = that.limit() - 1; i >= p; i--, j--) {
byte v1 = this.get(i);
byte v2 = that.get(j);
if (v1 != v2) {
return false;
}
}
return true;
}
return false;
}
@Override
public int compareTo(Buffer o) {
// taken from ByteBuffer#compareTo(...)
int n = position() + Math.min(remaining(), o.remaining());
for (int i = this.position(), j = o.position(); i < n; i++, j++) {
byte v1 = this.get(i);
byte v2 = o.get(j);
if (v1 == v2)
continue;
if (v1 < v2)
return -1;
return +1;
}
return remaining() - o.remaining();
}
protected void checkDispose() {
if (visible == null) {
throw new IllegalStateException(
"BufferWrapper has already been disposed",
disposeStackTrace) ;
}
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder("ByteBufferWrapper (" +
System.identityHashCode(this) + ") [");
sb.append("visible=[").append(visible).append(']');
sb.append(']');
return sb.toString();
}
@Override
public String toStringContent() {
return toStringContent(Charset.defaultCharset(), position(), limit());
}
@Override
public String toStringContent(Charset charset) {
return toStringContent(charset, position(), limit());
}
@Override
public String toStringContent(Charset charset, int position, int limit) {
checkDispose();
return Buffers.toStringContent(visible, charset, position, limit);
}
@Override
public void dumpHex(java.lang.Appendable appendable) {
Buffers.dumpBuffer(appendable, this);
}
/**
* {@inheritDoc}
*/
@Override
public final ByteBuffer toByteBuffer() {
checkDispose();
return visible;
}
/**
* {@inheritDoc}
*/
@Override
public final ByteBuffer toByteBuffer(int position, int limit) {
checkDispose();
final int currentPosition = visible.position();
final int currentLimit = visible.limit();
if (position == currentPosition && limit == currentLimit) {
return toByteBuffer();
}
Buffers.setPositionLimit(visible, position, limit);
final ByteBuffer resultBuffer = visible.slice();
Buffers.setPositionLimit(visible, currentPosition, currentLimit);
return resultBuffer;
}
/**
* {@inheritDoc}
*/
@Override
public final ByteBufferArray toByteBufferArray() {
checkDispose();
final ByteBufferArray array = ByteBufferArray.create();
array.add(visible);
return array;
}
/**
* {@inheritDoc}
*/
@Override
public final ByteBufferArray toByteBufferArray(final int position,
final int limit) {
return toByteBufferArray(ByteBufferArray.create(), position, limit);
}
/**
* {@inheritDoc}
*/
@Override
public final ByteBufferArray toByteBufferArray(final ByteBufferArray array) {
checkDispose();
array.add(visible);
return array;
}
/**
* {@inheritDoc}
*/
@Override
public final ByteBufferArray toByteBufferArray(final ByteBufferArray array,
final int position, final int limit) {
checkDispose();
final int oldPos = visible.position();
final int oldLim = visible.limit();
Buffers.setPositionLimit(visible, position, limit);
array.add(visible, oldPos, oldLim);
return array;
}
/**
* {@inheritDoc}
*/
@Override
public final BufferArray toBufferArray() {
checkDispose();
final BufferArray array = BufferArray.create();
array.add(this);
return array;
}
/**
* {@inheritDoc}
*/
@Override
public final BufferArray toBufferArray(final int position,
final int limit) {
return toBufferArray(BufferArray.create(), position, limit);
}
/**
* {@inheritDoc}
*/
@Override
public final BufferArray toBufferArray(final BufferArray array) {
checkDispose();
array.add(this);
return array;
}
/**
* {@inheritDoc}
*/
@Override
public final BufferArray toBufferArray(final BufferArray array,
final int position, final int limit) {
checkDispose();
final int oldPos = visible.position();
final int oldLim = visible.limit();
Buffers.setPositionLimit(visible, position, limit);
array.add(this, oldPos, oldLim);
return array;
}
@Override
public boolean release() {
return tryDispose();
}
/**
* {@inheritDoc}
*/
@Override
public boolean isExternal() {
return false;
}
@Override
public boolean hasArray() {
return visible.hasArray();
}
@Override
public byte[] array() {
return visible.array();
}
@Override
public int arrayOffset() {
return visible.arrayOffset();
}
protected ByteBufferWrapper wrapByteBuffer(final ByteBuffer byteBuffer) {
return new ByteBufferWrapper(byteBuffer);
}
private static class DebugLogic {
static void doDebug(ByteBufferWrapper wrapper) {
wrapper.visible.clear();
while(wrapper.visible.hasRemaining()) {
wrapper.visible.put((byte) 0xFF);
}
wrapper.visible.flip();
wrapper.disposeStackTrace = new Exception("ByteBufferWrapper was disposed from: ");
}
}
}
