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- 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
- // X
- // REPOSITORY
-
- private ClassPath _path = null;
- private WeakHashMap<String, JavaClass> _loadedClasses = new WeakHashMap<>(); // 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();
- }
- }
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