1 package org.codehaus.classworlds.uberjar.protocol.jar;
2
3 /*
4 $Id: Handler.java,v 1.1 2003/09/23 18:11:30 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 /*** <code>URLStreamHandler</code> for <code>jar:</code> protocol <code>URL</code>s.
55 *
56 * @author <a href="mailto:bob@eng.werken.com">bob mcwhirter</a>
57 *
58 * @version $Id: Handler.java,v 1.1 2003/09/23 18:11:30 jvanzyl Exp $
59 */
60 public class Handler
61 extends URLStreamHandler
62 {
63 // ----------------------------------------------------------------------
64 // Class members
65 // ----------------------------------------------------------------------
66
67 /*** Singleton instance. */
68 private static final Handler INSTANCE = new Handler();
69
70 // ----------------------------------------------------------------------
71 // Class methods
72 // ----------------------------------------------------------------------
73
74 /*** Retrieve the singleton instance.
75 *
76 * @return The singleton instance.
77 */
78 public static Handler getInstance()
79 {
80 return INSTANCE;
81 }
82
83 // ----------------------------------------------------------------------
84 // Constructors
85 // ----------------------------------------------------------------------
86
87
88 /*** Construct.
89 */
90 public Handler()
91 {
92 // intentionally left blank
93 }
94
95 // ----------------------------------------------------------------------
96 // Instance methods
97 // ----------------------------------------------------------------------
98
99 /*** @see java.net.URLStreamHandler
100 */
101 public URLConnection openConnection(URL url)
102 throws IOException
103 {
104 return new JarUrlConnection( url );
105 }
106
107 /*** @see java.net.URLStreamHandler
108 */
109 public void parseURL(URL url,
110 String spec,
111 int start,
112 int limit)
113 {
114 String specPath = spec.substring( start,
115 limit );
116
117 String urlPath = null;
118
119 if ( specPath.charAt( 0 ) == '/' )
120 {
121 urlPath = specPath;
122 }
123 else if ( specPath.charAt( 0 ) == '!' )
124 {
125 String relPath = url.getFile();
126
127 int bangLoc = relPath.lastIndexOf( "!" );
128
129 if ( bangLoc < 0 )
130 {
131 urlPath = relPath + specPath;
132 }
133 else
134 {
135 urlPath = relPath.substring( 0,
136 bangLoc ) + specPath;
137 }
138 }
139 else
140 {
141 String relPath = url.getFile();
142
143 if ( relPath != null )
144 {
145 int lastSlashLoc = relPath.lastIndexOf( "/" );
146
147 if ( lastSlashLoc < 0 )
148 {
149 urlPath = "/" + specPath;
150 }
151 else
152 {
153 urlPath = relPath.substring( 0,
154 lastSlashLoc + 1 ) + specPath;
155 }
156 }
157 else
158 {
159 urlPath = specPath;
160 }
161 }
162
163 setURL( url,
164 "jar",
165 null,
166 0,
167 null,
168 null,
169 urlPath,
170 null,
171 null );
172 }
173 }
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