/*
 * Copyright 2014 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 io.netty.handler.codec.stomp;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.handler.codec.DecoderResult;

The last StompContentSubframe which signals the end of the content batch 
 Note, even when no content is emitted by the protocol, an empty LastStompContentSubframe is issued to make the upstream parsing easier. /**
 * The last {@link StompContentSubframe} which signals the end of the content batch
 * <p/>
 * Note, even when no content is emitted by the protocol, an
 * empty {@link LastStompContentSubframe} is issued to make the upstream parsing
 * easier.
 */
public interface LastStompContentSubframe extends StompContentSubframe {

    LastStompContentSubframe EMPTY_LAST_CONTENT = new LastStompContentSubframe() {
        @Override
        public ByteBuf content() {
            return Unpooled.EMPTY_BUFFER;
        }

        @Override
        public LastStompContentSubframe copy() {
            return EMPTY_LAST_CONTENT;
        }

        @Override
        public LastStompContentSubframe duplicate() {
            return this;
        }

        @Override
        public LastStompContentSubframe retainedDuplicate() {
            return this;
        }

        @Override
        public LastStompContentSubframe replace(ByteBuf content) {
            return new DefaultLastStompContentSubframe(content);
        }

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

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

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

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

        @Override
        public int refCnt() {
            return 1;
        }

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

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

        @Override
        public DecoderResult decoderResult() {
            return DecoderResult.SUCCESS;
        }

        @Override
        public void setDecoderResult(DecoderResult result) {
            throw new UnsupportedOperationException("read only");
        }
    };

    @Override
    LastStompContentSubframe copy();

    @Override
    LastStompContentSubframe duplicate();

    @Override
    LastStompContentSubframe retainedDuplicate();

    @Override
    LastStompContentSubframe replace(ByteBuf content);

    @Override
    LastStompContentSubframe retain();

    @Override
    LastStompContentSubframe retain(int increment);

    @Override
    LastStompContentSubframe touch();

    @Override
    LastStompContentSubframe touch(Object hint);
}