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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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