View Javadoc

    1   /*
    2    *   Licensed to the Apache Software Foundation (ASF) under one
    3    *   or more contributor license agreements.  See the NOTICE file
    4    *   distributed with this work for additional information
    5    *   regarding copyright ownership.  The ASF licenses this file
    6    *   to you under the Apache License, Version 2.0 (the
    7    *   "License"); you may not use this file except in compliance
    8    *   with the License.  You may obtain a copy of the License at
    9    *
    10   *     http://www.apache.org/licenses/LICENSE-2.0
    11   *
    12   *   Unless required by applicable law or agreed to in writing,
    13   *   software distributed under the License is distributed on an
    14   *   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    15   *   KIND, either express or implied.  See the License for the
    16   *   specific language governing permissions and limitations
    17   *   under the License.
    18   *
    19   */
    20  package org.apache.mina.example.imagine.step1.codec;
    21
    22  import org.apache.mina.core.buffer.IoBuffer;
    23  import org.apache.mina.core.session.IoSession;
    24  import org.apache.mina.example.imagine.step1.ImageRequest;
    25  import org.apache.mina.filter.codec.CumulativeProtocolDecoder;
    26  import org.apache.mina.filter.codec.ProtocolDecoderOutput;
    27
    28  /**
    29   * a decoder for {@link ImageRequest} objects
    30   *
    31   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
    32   */
    33
    34  public class ImageRequestDecoder extends CumulativeProtocolDecoder {
    35
    36      protected boolean doDecode(IoSession session, IoBuffer in, ProtocolDecoderOutput out) throws Exception {
    37          if (in.remaining() >= 12) {
    38              int width = in.getInt();
    39              int height = in.getInt();
    40              int numberOfCharachters = in.getInt();
    41              ImageRequest request = new ImageRequest(width, height, numberOfCharachters);
    42              out.write(request);
    43              return true;
    44          } else {
    45              return false;
    46          }
    47      }
    48  }