| /* |
| * 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. |
| */ |
| /* |
| * $Id: ObjectFactory.java 468637 2006-10-28 06:51:02Z minchau $ |
| */ |
| |
| package org.apache.xalan.extensions; |
| |
| /** |
| * This class is duplicated for each JAXP subpackage so keep it in sync. |
| * It is package private and therefore is not exposed as part of the JAXP |
| * API. |
| * <p> |
| * This code is designed to implement the JAXP 1.1 spec pluggability |
| * feature and is designed to run on JDK version 1.1 and |
| * later, and to compile on JDK 1.2 and onward. |
| * The code also runs both as part of an unbundled jar file and |
| * when bundled as part of the JDK. |
| * <p> |
| * This class was moved from the <code>javax.xml.parsers.ObjectFactory</code> |
| * class and modified to be used as a general utility for creating objects |
| * dynamically. |
| * |
| * @version $Id: ObjectFactory.java 468637 2006-10-28 06:51:02Z minchau $ |
| */ |
| class ObjectFactory { |
| |
| /** |
| * Figure out which ClassLoader to use. For JDK 1.2 and later use |
| * the context ClassLoader. |
| */ |
| static ClassLoader findClassLoader() |
| throws ConfigurationError |
| { |
| // BEGIN android-changed |
| // the context class loader is always sufficient |
| return Thread.currentThread().getContextClassLoader(); |
| // END android-changed |
| } // findClassLoader():ClassLoader |
| |
| /** |
| * Find a Class using the specified ClassLoader |
| */ |
| static Class findProviderClass(String className, ClassLoader cl, |
| boolean doFallback) |
| throws ClassNotFoundException, ConfigurationError |
| { |
| //throw security exception if the calling thread is not allowed to access the |
| //class. Restrict the access to the package classes as specified in java.security policy. |
| SecurityManager security = System.getSecurityManager(); |
| try{ |
| if (security != null){ |
| final int lastDot = className.lastIndexOf("."); |
| String packageName = className; |
| if (lastDot != -1) packageName = className.substring(0, lastDot); |
| security.checkPackageAccess(packageName); |
| } |
| }catch(SecurityException e){ |
| throw e; |
| } |
| |
| Class providerClass; |
| if (cl == null) { |
| // XXX Use the bootstrap ClassLoader. There is no way to |
| // load a class using the bootstrap ClassLoader that works |
| // in both JDK 1.1 and Java 2. However, this should still |
| // work b/c the following should be true: |
| // |
| // (cl == null) iff current ClassLoader == null |
| // |
| // Thus Class.forName(String) will use the current |
| // ClassLoader which will be the bootstrap ClassLoader. |
| providerClass = Class.forName(className); |
| } else { |
| try { |
| providerClass = cl.loadClass(className); |
| } catch (ClassNotFoundException x) { |
| if (doFallback) { |
| // Fall back to current classloader |
| ClassLoader current = ObjectFactory.class.getClassLoader(); |
| if (current == null) { |
| providerClass = Class.forName(className); |
| } else if (cl != current) { |
| cl = current; |
| providerClass = cl.loadClass(className); |
| } else { |
| throw x; |
| } |
| } else { |
| throw x; |
| } |
| } |
| } |
| |
| return providerClass; |
| } |
| |
| // |
| // Classes |
| // |
| |
| /** |
| * A configuration error. |
| */ |
| static class ConfigurationError |
| extends Error { |
| static final long serialVersionUID = 8564305128443551853L; |
| // |
| // Data |
| // |
| |
| /** Exception. */ |
| private Exception exception; |
| |
| // |
| // Constructors |
| // |
| |
| /** |
| * Construct a new instance with the specified detail string and |
| * exception. |
| */ |
| ConfigurationError(String msg, Exception x) { |
| super(msg); |
| this.exception = x; |
| } // <init>(String,Exception) |
| |
| // |
| // Public methods |
| // |
| |
| /** Returns the exception associated to this error. */ |
| Exception getException() { |
| return exception; |
| } // getException():Exception |
| |
| } // class ConfigurationError |
| |
| } // class ObjectFactory |