| package org.aspectj.apache.bcel.util; |
| |
| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2001 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" and |
| * "Apache BCEL" must not be used to endorse or promote products |
| * derived from this software without prior written permission. For |
| * written permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * "Apache BCEL", nor may "Apache" appear in their name, without |
| * prior written permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.HashMap; |
| import java.util.WeakHashMap; |
| |
| import org.aspectj.apache.bcel.classfile.ClassParser; |
| import org.aspectj.apache.bcel.classfile.JavaClass; |
| |
| /** |
| * This repository is used in situations where a Class is created outside the realm of a ClassLoader. Classes are loaded from the |
| * file systems using the paths specified in the given class path. By default, this is the value returned by |
| * ClassPath.getClassPath(). <br> |
| * It is designed to be used as a singleton, however it can also be used with custom classpaths. |
| * |
| * /** Abstract definition of a class repository. Instances may be used to load classes from different sources and may be used in |
| * the Repository.setRepository method. |
| * |
| * @see org.aspectj.apache.bcel.Repository |
| * |
| * @version $Id: SyntheticRepository.java,v 1.8 2009/09/09 19:56:20 aclement Exp $ |
| * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
| * @author David Dixon-Peugh |
| */ |
| public class SyntheticRepository implements Repository { |
| private static final String DEFAULT_PATH = ClassPath.getClassPath(); |
| |
| private static HashMap<ClassPath, SyntheticRepository> _instances = new HashMap<ClassPath, SyntheticRepository>(); // CLASSPATH |
| // X |
| // REPOSITORY |
| |
| private ClassPath _path = null; |
| private WeakHashMap<String, JavaClass> _loadedClasses = new WeakHashMap<String, JavaClass>(); // CLASSNAME X JAVACLASS |
| |
| private SyntheticRepository(ClassPath path) { |
| _path = path; |
| } |
| |
| public static SyntheticRepository getInstance() { |
| return getInstance(ClassPath.getSystemClassPath()); |
| } |
| |
| public static SyntheticRepository getInstance(ClassPath classPath) { |
| SyntheticRepository rep = _instances.get(classPath); |
| |
| if (rep == null) { |
| rep = new SyntheticRepository(classPath); |
| _instances.put(classPath, rep); |
| } |
| |
| return rep; |
| } |
| |
| /** |
| * Store a new JavaClass instance into this Repository. |
| */ |
| public void storeClass(JavaClass clazz) { |
| _loadedClasses.put(clazz.getClassName(), clazz); |
| clazz.setRepository(this); |
| } |
| |
| /** |
| * Remove class from repository |
| */ |
| public void removeClass(JavaClass clazz) { |
| _loadedClasses.remove(clazz.getClassName()); |
| } |
| |
| /** |
| * Find an already defined (cached) JavaClass object by name. |
| */ |
| public JavaClass findClass(String className) { |
| return _loadedClasses.get(className); |
| } |
| |
| /** |
| * Load a JavaClass object for the given class name using the CLASSPATH environment variable. |
| */ |
| public JavaClass loadClass(String className) throws ClassNotFoundException { |
| if (className == null || className.equals("")) { |
| throw new IllegalArgumentException("Invalid class name " + className); |
| } |
| |
| className = className.replace('/', '.'); // Just in case, canonical form |
| |
| try { |
| return loadClass(_path.getInputStream(className), className); |
| } catch (IOException e) { |
| throw new ClassNotFoundException("Exception while looking for class " + className + ": " + e.toString()); |
| } |
| } |
| |
| /** |
| * Try to find class source via getResourceAsStream(). |
| * |
| * @see Class |
| * @return JavaClass object for given runtime class |
| */ |
| public JavaClass loadClass(Class clazz) throws ClassNotFoundException { |
| String className = clazz.getName(); |
| String name = className; |
| int i = name.lastIndexOf('.'); |
| |
| if (i > 0) { |
| name = name.substring(i + 1); |
| } |
| |
| return loadClass(clazz.getResourceAsStream(name + ".class"), className); |
| } |
| |
| private JavaClass loadClass(InputStream is, String className) throws ClassNotFoundException { |
| JavaClass clazz = findClass(className); |
| |
| if (clazz != null) { |
| return clazz; |
| } |
| |
| try { |
| if (is != null) { |
| ClassParser parser = new ClassParser(is, className); |
| clazz = parser.parse(); |
| |
| storeClass(clazz); |
| |
| return clazz; |
| } |
| } catch (IOException e) { |
| throw new ClassNotFoundException("Exception while looking for class " + className + ": " + e.toString()); |
| } |
| |
| throw new ClassNotFoundException("SyntheticRepository could not load " + className); |
| } |
| |
| /** |
| * Clear all entries from cache. |
| */ |
| public void clear() { |
| _loadedClasses.clear(); |
| } |
| } |