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1   /*
2    * Copyright 2012 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    * http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  
17  package io.netty.handler.codec.sctp;
18  
19  import io.netty.channel.sctp.SctpMessage;
20  import io.netty.handler.codec.CodecException;
21  import io.netty.handler.codec.MessageToMessageDecoder;
22  
23  public abstract class SctpMessageToMessageDecoder extends MessageToMessageDecoder<SctpMessage> {
24  
25      @Override
26      public boolean acceptInboundMessage(Object msg) throws Exception {
27          if (msg instanceof SctpMessage) {
28              SctpMessage sctpMsg = (SctpMessage) msg;
29              if (sctpMsg.isComplete()) {
30                  return true;
31              }
32  
33              throw new CodecException(String.format("Received SctpMessage is not complete, please add %s in " +
34                      "the pipeline before this handler", SctpMessageCompletionHandler.class.getSimpleName()));
35          } else {
36              return false;
37          }
38      }
39  }