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 }