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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  package org.jboss.netty.handler.codec.rtsp;
17  
18  import org.jboss.netty.handler.codec.http.HttpVersion;
19  
20  /**
21   * The version of RTSP.
22   * @apiviz.exclude
23   */
24  public final class RtspVersions {
25  
26      /**
27       * RTSP/1.0
28       */
29      public static final HttpVersion RTSP_1_0 = new HttpVersion("RTSP", 1, 0, true);
30  
31      /**
32       * Returns an existing or new {@link HttpVersion} instance which matches to
33       * the specified RTSP version string.  If the specified {@code text} is
34       * equal to {@code "RTSP/1.0"}, {@link #RTSP_1_0} will be returned.
35       * Otherwise, a new {@link HttpVersion} instance will be returned.
36       */
37      public static HttpVersion valueOf(String text) {
38          if (text == null) {
39              throw new NullPointerException("text");
40          }
41  
42          text = text.trim().toUpperCase();
43          if ("RTSP/1.0".equals(text)) {
44              return RTSP_1_0;
45          }
46  
47          return new HttpVersion(text, true);
48      }
49  
50      private RtspVersions() {
51      }
52  }