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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 chunk delimiters
    20   *
    21   * @author Michael Mimo Moratti (mimo@mimo.ch)
    22   *
    23   * @see IcapMessageDecoder
    24   * @see StateEnum
    25   */
    26  public class ReadChunkDelimiterState extends State<Object> {
    27
    28  	public ReadChunkDelimiterState(String name) {
    29  		super(name);
    30  	}
    31
    32  	@Override
    33  	public void onEntry(ChannelBuffer buffer, IcapMessageDecoder icapMessageDecoder) throws DecodingException {
    34  	}
    35
    36  	@Override
    37  	public StateReturnValue execute(ChannelBuffer buffer, IcapMessageDecoder icapMessageDecoder) throws DecodingException {
    38          for (;;) {
    39              byte next = buffer.readByte();
    40              if (next == IcapCodecUtil.CR) {
    41                  if (buffer.readByte() == IcapCodecUtil.LF) {
    42                      return StateReturnValue.createIrrelevantResult();
    43                  }
    44              } else if (next == IcapCodecUtil.LF) {
    45                  return StateReturnValue.createIrrelevantResult();
    46              }
    47          }
    48  	}
    49
    50  	@Override
    51  	public StateEnum onExit(ChannelBuffer buffer, IcapMessageDecoder icapMessageDecoder, Object decisionInformation) throws DecodingException {
    52  		return StateEnum.READ_CHUNK_SIZE_STATE;
    53  	}
    54
    55  }