135 lines
4.2 KiB
Java
135 lines
4.2 KiB
Java
/*
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* Copyright 2013 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.net5.buffer;
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import static java.util.Objects.requireNonNull;
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import java.nio.ByteOrder;
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/**
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* A {@link ByteBuf} implementation that wraps another buffer to prevent a user from increasing or decreasing the
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* wrapped buffer's reference count.
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*/
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final class UnreleasableByteBuf extends WrappedByteBuf {
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private SwappedByteBuf swappedBuf;
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UnreleasableByteBuf(ByteBuf buf) {
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super(buf instanceof UnreleasableByteBuf ? buf.unwrap() : buf);
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}
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@Override
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public ByteBuf order(ByteOrder endianness) {
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requireNonNull(endianness, "endianness");
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if (endianness == order()) {
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return this;
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}
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SwappedByteBuf swappedBuf = this.swappedBuf;
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if (swappedBuf == null) {
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this.swappedBuf = swappedBuf = new SwappedByteBuf(this);
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}
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return swappedBuf;
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}
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@Override
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public ByteBuf asReadOnly() {
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return buf.isReadOnly() ? this : new UnreleasableByteBuf(buf.asReadOnly());
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}
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@Override
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public ByteBuf readSlice(int length) {
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return new UnreleasableByteBuf(buf.readSlice(length));
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}
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@Override
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public ByteBuf readRetainedSlice(int length) {
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// We could call buf.readSlice(..), and then call buf.release(). However this creates a leak in unit tests
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// because the release method on UnreleasableByteBuf will never allow the leak record to be cleaned up.
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// So we just use readSlice(..) because the end result should be logically equivalent.
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return readSlice(length);
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}
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@Override
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public ByteBuf slice() {
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return new UnreleasableByteBuf(buf.slice());
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}
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@Override
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public ByteBuf retainedSlice() {
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// We could call buf.retainedSlice(), and then call buf.release(). However this creates a leak in unit tests
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// because the release method on UnreleasableByteBuf will never allow the leak record to be cleaned up.
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// So we just use slice() because the end result should be logically equivalent.
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return slice();
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}
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@Override
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public ByteBuf slice(int index, int length) {
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return new UnreleasableByteBuf(buf.slice(index, length));
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}
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@Override
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public ByteBuf retainedSlice(int index, int length) {
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// We could call buf.retainedSlice(..), and then call buf.release(). However this creates a leak in unit tests
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// because the release method on UnreleasableByteBuf will never allow the leak record to be cleaned up.
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// So we just use slice(..) because the end result should be logically equivalent.
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return slice(index, length);
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}
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@Override
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public ByteBuf duplicate() {
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return new UnreleasableByteBuf(buf.duplicate());
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}
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@Override
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public ByteBuf retainedDuplicate() {
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// We could call buf.retainedDuplicate(), and then call buf.release(). However this creates a leak in unit tests
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// because the release method on UnreleasableByteBuf will never allow the leak record to be cleaned up.
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// So we just use duplicate() because the end result should be logically equivalent.
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return duplicate();
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}
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@Override
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public ByteBuf retain(int increment) {
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return this;
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}
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@Override
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public ByteBuf retain() {
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return this;
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}
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@Override
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public ByteBuf touch() {
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return this;
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}
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@Override
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public ByteBuf touch(Object hint) {
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return this;
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}
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@Override
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public boolean release() {
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return false;
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}
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@Override
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public boolean release(int decrement) {
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return false;
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}
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}
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