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1   /*******************************************************************************
2    * Copyright (c) 2011 Michael Mimo Moratti.
3    *
4    * Michael Mimo Moratti licenses this file to you under the Apache License, version 2.0
5    * (the "License"); you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at:
7    *     http://www.apache.org/licenses/LICENSE-2.0
8    * Unless required by applicable law or agreed to in writing, software
9    * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
10   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
11   * License for the specific language governing permissions and limitations
12   * under the License.
13   *******************************************************************************/
14  package ch.mimo.netty.handler.codec.icap;
15  
16  import org.jboss.netty.buffer.ChannelBuffer;
17  
18  /**
19   * Decoder State that reads icap initial.
20   * 
21   * @author Michael Mimo Moratti (mimo@mimo.ch)
22   *
23   * @see IcapMessageDecoder
24   * @see StateEnum
25   */
26  public class ReadIcapInitialState extends State<Object> {
27  
28  	public ReadIcapInitialState(String name) {
29  		super(name);
30  	}
31  	
32  	@Override
33  	public void onEntry(ChannelBuffer buffer, IcapMessageDecoder icapMessageDecoder) throws DecodingException {
34  		// NOOP
35  	}
36  
37  	@Override
38  	public StateReturnValue execute(ChannelBuffer buffer, IcapMessageDecoder icapMessageDecoder) throws DecodingException {
39  		String[] initialLine = IcapDecoderUtil.splitInitialLine(IcapDecoderUtil.readLine(buffer,icapMessageDecoder.maxInitialLineLength));
40  		icapMessageDecoder.message = icapMessageDecoder.createMessage(initialLine);
41  		return StateReturnValue.createIrrelevantResult();
42  	}
43  
44  	@Override
45  	public StateEnum onExit(ChannelBuffer buffer, IcapMessageDecoder icapMessageDecoder, Object decisionInformation) throws DecodingException {
46  		if(icapMessageDecoder.message == null) {
47  			return StateEnum.SKIP_CONTROL_CHARS;
48  		}
49  		return StateEnum.READ_ICAP_HEADER_STATE;
50  	}
51  }