| /* |
| * 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 org.apache.axiom.util.stax.dialect; |
| |
| import java.lang.reflect.Field; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| |
| import javax.xml.stream.XMLInputFactory; |
| import javax.xml.stream.XMLOutputFactory; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| /** |
| * Utility class to remove the {@link XMLInputFactory} or {@link XMLOutputFactory} wrapper added by |
| * JBoss 7. This class gives access the actual (implementation dependent) factory. This is important |
| * to correct detect the StAX dialect. |
| */ |
| final class JBossFactoryUnwrapper { |
| private static final Log log = LogFactory.getLog(JBossFactoryUnwrapper.class); |
| |
| private final Class wrapperClass; |
| private final Field actual; |
| |
| private JBossFactoryUnwrapper(Class factoryType) throws Exception { |
| wrapperClass = Class.forName("__redirected.__" + factoryType.getSimpleName()); |
| try { |
| actual = wrapperClass.getDeclaredField("actual"); |
| AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| actual.setAccessible(true); |
| return null; |
| } |
| }); |
| } catch (Exception ex) { |
| log.error("Found JBoss wrapper class for " + factoryType.getSimpleName() + ", but unwrapping is not supported", ex); |
| throw ex; |
| } |
| } |
| |
| /** |
| * Get the unwrapper for the given factory type. |
| * |
| * @param factoryType |
| * the factory type ({@link XMLInputFactory} or {@link XMLOutputFactory}) |
| * @return the unwrapper, or <code>null</code> if the unwrapper could not be created (which |
| * usually means that the code is not executed inside JBoss) |
| */ |
| static JBossFactoryUnwrapper create(Class factoryType) { |
| try { |
| return new JBossFactoryUnwrapper(factoryType); |
| } catch (Exception ex) { |
| return null; |
| } |
| } |
| |
| Object unwrap(Object factory) { |
| if (wrapperClass.isInstance(factory)) { |
| try { |
| return actual.get(factory); |
| } catch (IllegalAccessException ex) { |
| throw new IllegalAccessError(ex.getMessage()); |
| } |
| } else { |
| return factory; |
| } |
| } |
| } |