1 package org.codehaus.classworlds.uberjar.protocol.jar;
2
3 /*
4 $Id: Handler.java,v 1.1.1.1 2004/07/01 13:59:19 jvanzyl Exp $
5
6 Copyright 2002 (C) The Werken Company. All Rights Reserved.
7
8 Redistribution and use of this software and associated documentation
9 ("Software"), with or without modification, are permitted provided
10 that the following conditions are met:
11
12 1. Redistributions of source code must retain copyright
13 statements and notices. Redistributions must also contain a
14 copy of this document.
15
16 2. Redistributions in binary form must reproduce the
17 above copyright notice, this list of conditions and the
18 following disclaimer in the documentation and/or other
19 materials provided with the distribution.
20
21 3. The name "classworlds" must not be used to endorse or promote
22 products derived from this Software without prior written
23 permission of The Werken Company. For written permission,
24 please contact bob@werken.com.
25
26 4. Products derived from this Software may not be called "classworlds"
27 nor may "classworlds" appear in their names without prior written
28 permission of The Werken Company. "classworlds" is a registered
29 trademark of The Werken Company.
30
31 5. Due credit should be given to The Werken Company.
32 (http://classworlds.werken.com/).
33
34 THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS
35 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
36 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
37 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
38 THE WERKEN COMPANY OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
39 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
40 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
41 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
42 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
43 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
44 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
45 OF THE POSSIBILITY OF SUCH DAMAGE.
46
47 */
48
49 import java.io.IOException;
50 import java.net.URL;
51 import java.net.URLConnection;
52 import java.net.URLStreamHandler;
53
54 /***
55 * <code>URLStreamHandler</code> for <code>jar:</code> protocol <code>URL</code>s.
56 *
57 * @author <a href="mailto:bob@eng.werken.com">bob mcwhirter</a>
58 * @version $Id: Handler.java,v 1.1.1.1 2004/07/01 13:59:19 jvanzyl Exp $
59 */
60 public class Handler
61 extends URLStreamHandler
62 {
63 // ----------------------------------------------------------------------
64 // Class members
65 // ----------------------------------------------------------------------
66
67 /***
68 * Singleton instance.
69 */
70 private static final Handler INSTANCE = new Handler();
71
72 // ----------------------------------------------------------------------
73 // Class methods
74 // ----------------------------------------------------------------------
75
76 /***
77 * Retrieve the singleton instance.
78 *
79 * @return The singleton instance.
80 */
81 public static Handler getInstance()
82 {
83 return INSTANCE;
84 }
85
86 // ----------------------------------------------------------------------
87 // Constructors
88 // ----------------------------------------------------------------------
89
90
91 /***
92 * Construct.
93 */
94 public Handler()
95 {
96 // intentionally left blank
97 }
98
99 // ----------------------------------------------------------------------
100 // Instance methods
101 // ----------------------------------------------------------------------
102
103 /***
104 * @see java.net.URLStreamHandler
105 */
106 public URLConnection openConnection( URL url )
107 throws IOException
108 {
109 return new JarUrlConnection( url );
110 }
111
112 /***
113 * @see java.net.URLStreamHandler
114 */
115 public void parseURL( URL url,
116 String spec,
117 int start,
118 int limit )
119 {
120 String specPath = spec.substring( start,
121 limit );
122
123 String urlPath = null;
124
125 if ( specPath.charAt( 0 ) == '/' )
126 {
127 urlPath = specPath;
128 }
129 else if ( specPath.charAt( 0 ) == '!' )
130 {
131 String relPath = url.getFile();
132
133 int bangLoc = relPath.lastIndexOf( "!" );
134
135 if ( bangLoc < 0 )
136 {
137 urlPath = relPath + specPath;
138 }
139 else
140 {
141 urlPath = relPath.substring( 0,
142 bangLoc ) + specPath;
143 }
144 }
145 else
146 {
147 String relPath = url.getFile();
148
149 if ( relPath != null )
150 {
151 int lastSlashLoc = relPath.lastIndexOf( "/" );
152
153 if ( lastSlashLoc < 0 )
154 {
155 urlPath = "/" + specPath;
156 }
157 else
158 {
159 urlPath = relPath.substring( 0,
160 lastSlashLoc + 1 ) + specPath;
161 }
162 }
163 else
164 {
165 urlPath = specPath;
166 }
167 }
168
169 setURL( url,
170 "jar",
171 null,
172 0,
173 null,
174 null,
175 urlPath,
176 null,
177 null );
178 }
179 }