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/* * Copyright 2002-2018 the original author or authors. * * Licensed 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 org.springframework.messaging.tcp.reactor; import java.nio.ByteBuffer; import java.util.Collection; import java.util.List; import io.netty.buffer.ByteBuf; import org.springframework.messaging.Message; /** * Convenient base class for {@link ReactorNettyCodec} implementations that need * to work with NIO {@link ByteBuffer ByteBuffers}. * * @author Rossen Stoyanchev * @since 5.0 * @param <P> the message payload type */ public abstract class AbstractNioBufferReactorNettyCodec<P> implements ReactorNettyCodec<P> { @Override public Collection<Message<P>> decode(ByteBuf inputBuffer) { ByteBuffer nioBuffer = inputBuffer.nioBuffer(); int start = nioBuffer.position(); List<Message<P>> messages = decodeInternal(nioBuffer); inputBuffer.skipBytes(nioBuffer.position() - start); return messages; } @Override public void encode(Message<P> message, ByteBuf outputBuffer) { outputBuffer.writeBytes(encodeInternal(message)); } protected abstract List<Message<P>> decodeInternal(ByteBuffer nioBuffer); protected abstract ByteBuffer encodeInternal(Message<P> message); }