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1 package org.apache.bcel.util; 2 3 /* ==================================================================== 4 * The Apache Software License, Version 1.1 5 * 6 * Copyright (c) 2001 The Apache Software Foundation. All rights 7 * reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The end-user documentation included with the redistribution, 22 * if any, must include the following acknowledgment: 23 * "This product includes software developed by the 24 * Apache Software Foundation (http://www.apache.org/)." 25 * Alternately, this acknowledgment may appear in the software itself, 26 * if and wherever such third-party acknowledgments normally appear. 27 * 28 * 4. The names "Apache" and "Apache Software Foundation" and 29 * "Apache BCEL" must not be used to endorse or promote products 30 * derived from this software without prior written permission. For 31 * written permission, please contact apache@apache.org. 32 * 33 * 5. Products derived from this software may not be called "Apache", 34 * "Apache BCEL", nor may "Apache" appear in their name, without 35 * prior written permission of the Apache Software Foundation. 36 * 37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This software consists of voluntary contributions made by many 52 * individuals on behalf of the Apache Software Foundation. For more 53 * information on the Apache Software Foundation, please see 54 * <http://www.apache.org/>;. 55 */ 56 57 import java.io.*; 58 59 import java.util.Map; 60 import java.util.HashMap; 61 62 import org.apache.bcel.classfile.*; 63 64 /*** 65 * The repository maintains information about which classes have 66 * been loaded. 67 * 68 * It loads its data from the ClassLoader implementation 69 * passed into its constructor. 70 * 71 * @see org.apache.bcel.Repository 72 * 73 * @version $Id: ClassLoaderRepository.java,v 1.4 2002/10/11 20:34:47 mdahm Exp $ 74 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 75 * @author David Dixon-Peugh 76 */ 77 public class ClassLoaderRepository 78 implements Repository 79 { 80 private java.lang.ClassLoader loader; 81 private HashMap loadedClasses = 82 new HashMap(); // CLASSNAME X JAVACLASS 83 84 public ClassLoaderRepository( java.lang.ClassLoader loader ) { 85 this.loader = loader; 86 } 87 88 /*** 89 * Store a new JavaClass into this Repository. 90 */ 91 public void storeClass( JavaClass clazz ) { 92 loadedClasses.put( clazz.getClassName(), 93 clazz ); 94 clazz.setRepository( this ); 95 } 96 97 /*** 98 * Remove class from repository 99 */ 100 public void removeClass(JavaClass clazz) { 101 loadedClasses.remove(clazz.getClassName()); 102 } 103 104 /*** 105 * Find an already defined JavaClass. 106 */ 107 public JavaClass findClass( String className ) { 108 if ( loadedClasses.containsKey( className )) { 109 return (JavaClass) loadedClasses.get( className ); 110 } else { 111 return null; 112 } 113 } 114 115 /*** 116 * Lookup a JavaClass object from the Class Name provided. 117 */ 118 public JavaClass loadClass( String className ) 119 throws ClassNotFoundException 120 { 121 String classFile = className.replace('.', '/'); 122 123 JavaClass RC = findClass( className ); 124 if (RC != null) { return RC; } 125 126 try { 127 InputStream is = 128 loader.getResourceAsStream( classFile + ".class" ); 129 130 if(is == null) { 131 throw new ClassNotFoundException(className + " not found."); 132 } 133 134 ClassParser parser = new ClassParser( is, className ); 135 RC = parser.parse(); 136 137 storeClass( RC ); 138 139 return RC; 140 } catch (IOException e) { 141 throw new ClassNotFoundException( e.toString() ); 142 } 143 } 144 145 public JavaClass loadClass(Class clazz) throws ClassNotFoundException { 146 return loadClass(clazz.getName()); 147 } 148 149 /*** Clear all entries from cache. 150 */ 151 public void clear() { 152 loadedClasses.clear(); 153 } 154 } 155

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