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1 package org.codehaus.classworlds; 2 3 /* 4 $Id: RealmClassLoader.java,v 1.3 2003/09/23 14:09:46 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.net.URL; 50 import java.net.URLClassLoader; 51 import java.net.MalformedURLException; 52 53 /*** Classloader for <code>ClassRealm</code>s. 54 * 55 * @author <a href="mailto:bob@eng.werken.com">bob mcwhirter</a> 56 * 57 * @version $Id: RealmClassLoader.java,v 1.3 2003/09/23 14:09:46 jvanzyl Exp $ 58 */ 59 class RealmClassLoader 60 extends URLClassLoader 61 { 62 // ------------------------------------------------------------ 63 // Instance members 64 // ------------------------------------------------------------ 65 66 /*** The realm. */ 67 protected DefaultClassRealm realm; 68 69 // ------------------------------------------------------------ 70 // Constructors 71 // ------------------------------------------------------------ 72 73 /*** Construct. 74 * 75 * @param realm The realm for which this loads. 76 */ 77 RealmClassLoader(DefaultClassRealm realm) 78 { 79 super( new URL[0] ); 80 this.realm = realm; 81 } 82 83 // ------------------------------------------------------------ 84 // Instance methods 85 // ------------------------------------------------------------ 86 87 /*** Retrieve the realm. 88 * 89 * @return The realm. 90 */ 91 DefaultClassRealm getRealm() 92 { 93 return this.realm; 94 } 95 96 /*** Add a constituent to this realm for locating classes. 97 * 98 * @param constituent URL to contituent jar or directory. 99 */ 100 void addConstituent(URL constituent) 101 { 102 String urlStr = constituent.toExternalForm(); 103 104 if ( urlStr.startsWith( "jar:" ) 105 && 106 urlStr.endsWith( "!/" ) ) 107 { 108 urlStr = urlStr.substring( 4, 109 urlStr.length() - 2 ); 110 111 try 112 { 113 constituent = new URL( urlStr ); 114 } 115 catch (MalformedURLException e) 116 { 117 e.printStackTrace(); 118 } 119 } 120 121 addURL( constituent ); 122 } 123 124 /*** Load a class directly from this classloader without 125 * defering through any other <code>ClassRealm</code>. 126 * 127 * @param name The name of the class to load. 128 * 129 * @return The loaded class. 130 * 131 * @throws ClassNotFoundException If the class could not be found. 132 */ 133 Class loadClassDirect(String name) throws ClassNotFoundException 134 { 135 return super.loadClass( name, true ); 136 } 137 138 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 139 // java.lang.ClassLoader 140 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 141 142 /*** Load a class. 143 * 144 * @param name The name of the class to load. 145 * @param resolve If <code>true</code> then resolve the class. 146 * 147 * @return The loaded class. 148 * 149 * @throws ClassNotFoundException If the class cannot be found. 150 */ 151 protected Class loadClass(String name, 152 boolean resolve) throws ClassNotFoundException 153 { 154 return getRealm().loadClass( name ); 155 } 156 157 /*** Retrieve the <code>URL</code>s used by this <code>ClassLoader</code>. 158 * 159 * @return The urls. 160 */ 161 public URL[] getURLs() 162 { 163 return super.getURLs(); 164 } 165 166 public URL findResource( String name ) 167 { 168 return super.findResource( name ); 169 } 170 }

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