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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * 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:
 *
 *   https://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 io.netty.util.internal.ObjectUtil;

import java.nio.ByteOrder;

/**
 * A {@link ByteBuf} implementation that wraps another buffer to prevent a user from increasing or decreasing the
 * wrapped buffer's reference count.
 */
final class UnreleasableByteBuf extends WrappedByteBuf {

    private SwappedByteBuf swappedBuf;

    UnreleasableByteBuf(ByteBuf buf) {
        super(buf instanceof UnreleasableByteBuf ? buf.unwrap() : buf);
    }

    @Override
    public ByteBuf order(ByteOrder endianness) {
        if (ObjectUtil.checkNotNull(endianness, "endianness") == order()) {
            return this;
        }

        SwappedByteBuf swappedBuf = this.swappedBuf;
        if (swappedBuf == null) {
            this.swappedBuf = swappedBuf = new SwappedByteBuf(this);
        }
        return swappedBuf;
    }

    @Override
    public ByteBuf asReadOnly() {
        return buf.isReadOnly() ? this : new UnreleasableByteBuf(buf.asReadOnly());
    }

    @Override
    public ByteBuf readSlice(int length) {
        return new UnreleasableByteBuf(buf.readSlice(length));
    }

    @Override
    public ByteBuf readRetainedSlice(int length) {
        // We could call buf.readSlice(..), and then call buf.release(). However this creates a leak in unit tests
        // because the release method on UnreleasableByteBuf will never allow the leak record to be cleaned up.
        // So we just use readSlice(..) because the end result should be logically equivalent.
        return readSlice(length);
    }

    @Override
    public ByteBuf slice() {
        return new UnreleasableByteBuf(buf.slice());
    }

    @Override
    public ByteBuf retainedSlice() {
        // We could call buf.retainedSlice(), and then call buf.release(). However this creates a leak in unit tests
        // because the release method on UnreleasableByteBuf will never allow the leak record to be cleaned up.
        // So we just use slice() because the end result should be logically equivalent.
        return slice();
    }

    @Override
    public ByteBuf slice(int index, int length) {
        return new UnreleasableByteBuf(buf.slice(index, length));
    }

    @Override
    public ByteBuf retainedSlice(int index, int length) {
        // We could call buf.retainedSlice(..), and then call buf.release(). However this creates a leak in unit tests
        // because the release method on UnreleasableByteBuf will never allow the leak record to be cleaned up.
        // So we just use slice(..) because the end result should be logically equivalent.
        return slice(index, length);
    }

    @Override
    public ByteBuf duplicate() {
        return new UnreleasableByteBuf(buf.duplicate());
    }

    @Override
    public ByteBuf retainedDuplicate() {
        // We could call buf.retainedDuplicate(), and then call buf.release(). However this creates a leak in unit tests
        // because the release method on UnreleasableByteBuf will never allow the leak record to be cleaned up.
        // So we just use duplicate() because the end result should be logically equivalent.
        return duplicate();
    }

    @Override
    public ByteBuf retain(int increment) {
        return this;
    }

    @Override
    public ByteBuf retain() {
        return this;
    }

    @Override
    public ByteBuf touch() {
        return this;
    }

    @Override
    public ByteBuf touch(Object hint) {
        return this;
    }

    @Override
    public boolean release() {
        return false;
    }

    @Override
    public boolean release(int decrement) {
        return false;
    }
}