ParsedURLJarProtocolHandler


1   /*
2   
3      Copyright 2001-2003  The Apache Software Foundation 
4   
5      Licensed under the Apache License, Version 2.0 (the "License");
6      you may not use this file except in compliance with the License.
7      You may obtain a copy of the License at
8   
9          http://www.apache.org/licenses/LICENSE-2.0
10  
11     Unless required by applicable law or agreed to in writing, software
12     distributed under the License is distributed on an "AS IS" BASIS,
13     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14     See the License for the specific language governing permissions and
15     limitations under the License.
16  
17   */
18  package org.apache.batik.util;
19  
20  import java.net.MalformedURLException  ;
21  import java.net.URL  ;
22  
23  /**
24   * Protocol Handler for the 'jar' protocol.
25   * This appears to have the format:
26   * jar:<URL for jar file>!<path in jar file>
27   *
28   * @author <a HREF="mailto:deweese@apache.org">Thomas DeWeese</a>
29   * @version $Id: ParsedURLJarProtocolHandler.java,v 1.7 2004/08/18 07:15:49 vhardy Exp $ 
30   */
31  public class ParsedURLJarProtocolHandler 
32      extends ParsedURLDefaultProtocolHandler {
33  
34      public static final String   JAR = "jar";
35  
36      public ParsedURLJarProtocolHandler() {
37          super(JAR);
38      }
39  
40  
41      // We mostly use the base class parse methods (that leverage
42      // java.net.URL.  But we take care to ignore the baseURL if urlStr
43      // is an absolute URL.
44      public ParsedURLData parseURL(ParsedURL baseURL, String   urlStr) {
45          String   start = urlStr.substring(0, JAR.length()+1).toLowerCase();
46          
47          // urlStr is absolute...
48          if (start.equals(JAR+":"))
49              return parseURL(urlStr);
50  
51          // It's relative so base it off baseURL.
52          try {
53              URL   context = new URL  (baseURL.toString());
54              URL   url     = new URL  (context, urlStr);
55              return constructParsedURLData(url);
56          } catch (MalformedURLException   mue) {
57              return super.parseURL(baseURL, urlStr);
58          }
59      }
60  }
61  
62
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags