| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.sun.org.apache.bcel.internal.util; |
| |
| |
| import java.io.*; |
| |
| import java.util.HashMap; |
| |
| import com.sun.org.apache.bcel.internal.classfile.*; |
| |
| /** |
| * 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 com.sun.org.apache.bcel.internal.Repository |
| * |
| * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
| * @author David Dixon-Peugh |
| */ |
| public class SyntheticRepository implements Repository { |
| |
| private static HashMap _instances = new HashMap(); // CLASSPATH X REPOSITORY |
| |
| private HashMap _loadedClasses = new HashMap(); // CLASSNAME X JAVACLASS |
| |
| private SyntheticRepository() { |
| } |
| |
| public static SyntheticRepository getInstance() { |
| return new SyntheticRepository(); |
| } |
| |
| /** |
| * 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 (JavaClass)_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 |
| |
| IOException e = new IOException("Couldn't find: " + className + ".class"); |
| 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(); |
| } |
| } |