1 package org.codehaus.classworlds; 2 3 /* 4 $Id: ClassWorld.java,v 1.1.1.1 2004/07/01 13:59:17 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.util.Map; 50 import java.util.HashMap; 51 import java.util.Collection; 52 53 /*** 54 * A collection of <code>ClassRealm</code>s, indexed by id. 55 * 56 * @author <a href="mailto:bob@eng.werken.com">bob mcwhirter</a> 57 * @version $Id: ClassWorld.java,v 1.1.1.1 2004/07/01 13:59:17 jvanzyl Exp $ 58 */ 59 public class ClassWorld 60 { 61 private Map realms; 62 63 public ClassWorld( String realmId, ClassLoader classLoader ) 64 { 65 this(); 66 67 try 68 { 69 newRealm( realmId, classLoader ); 70 } 71 catch ( DuplicateRealmException e ) 72 { 73 // Will never happen as we are just creating the world. 74 } 75 } 76 77 public ClassWorld() 78 { 79 this.realms = new HashMap(); 80 } 81 82 public ClassRealm newRealm( String id ) 83 throws DuplicateRealmException 84 { 85 return newRealm( id, null ); 86 } 87 88 public ClassRealm newRealm( String id, ClassLoader classLoader ) 89 throws DuplicateRealmException 90 { 91 if ( realms.containsKey( id ) ) 92 { 93 throw new DuplicateRealmException( this, id ); 94 } 95 96 ClassRealm realm = null; 97 98 if ( classLoader != null ) 99 { 100 realm = new DefaultClassRealm( this, id, classLoader ); 101 102 realms.put( id, realm ); 103 } 104 else 105 { 106 realm = new DefaultClassRealm( this, id ); 107 } 108 109 realms.put( id, realm ); 110 111 return realm; 112 } 113 114 public void disposeRealm( String id ) 115 throws NoSuchRealmException 116 { 117 realms.remove( id ); 118 } 119 120 public ClassRealm getRealm( String id ) 121 throws NoSuchRealmException 122 { 123 if ( realms.containsKey( id ) ) 124 { 125 return (ClassRealm) realms.get( id ); 126 } 127 128 throw new NoSuchRealmException( this, id ); 129 } 130 131 public Collection getRealms() 132 { 133 return realms.values(); 134 } 135 136 Class loadClass( String name ) 137 throws ClassNotFoundException 138 { 139 // Use the classloader that was used to load classworlds itself to 140 // load anything classes within org.codehaus.classworlds.* 141 142 return getClass().getClassLoader().loadClass( name ); 143 } 144 }