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   /*
    * 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:
    *
    * 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.handler.codec.sctp;
  
  import io.netty.channel.sctp.SctpMessage;
  import io.netty.handler.codec.CodecException;
  import io.netty.handler.codec.MessageToMessageDecoder;
  
  public abstract class SctpMessageToMessageDecoder extends MessageToMessageDecoder<SctpMessage> {
  
      @Override
      public boolean acceptInboundMessage(Object msg) throws Exception {
          if (msg instanceof SctpMessage) {
              SctpMessage sctpMsg = (SctpMessage) msg;
              if (sctpMsg.isComplete()) {
                  return true;
              }
  
              throw new CodecException(String.format("Received SctpMessage is not complete, please add %s in " +
                      "the pipeline before this handler", SctpMessageCompletionHandler.class.getSimpleName()));
          } else {
              return false;
          }
      }
  }