netty5/transport/src/main/java/io/netty/channel/ChannelInboundByteHandlerAdapter.java

/*
 * Copyright 2012 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.channel;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;


public abstract class ChannelInboundByteHandlerAdapter
        extends ChannelInboundHandlerAdapter implements ChannelInboundByteHandler {

    @Override
    public ByteBuf newInboundBuffer(ChannelHandlerContext ctx) throws Exception {
        return Unpooled.buffer();
    }

    @Override
    public final void inboundBufferUpdated(ChannelHandlerContext ctx) throws Exception {
        ByteBuf in = ctx.inboundByteBuffer();
        try {
            inboundBufferUpdated(ctx, in);
        } finally {
            if (!in.readable()) {
                in.discardReadBytes();
            }
        }
    }

    public abstract void inboundBufferUpdated(ChannelHandlerContext ctx, ByteBuf in) throws Exception;
}