| /* |
| * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.xml.internal.bind.v2.model.annotation; |
| |
| import java.lang.annotation.Annotation; |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Proxy; |
| import java.lang.reflect.Modifier; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import com.sun.xml.internal.bind.v2.runtime.Location; |
| |
| /** |
| * {@link Annotation} that also implements {@link Locatable}. |
| * |
| * @author Kohsuke Kawaguchi |
| */ |
| public class LocatableAnnotation implements InvocationHandler, Locatable, Location { |
| private final Annotation core; |
| |
| private final Locatable upstream; |
| |
| /** |
| * Wraps the annotation into a proxy so that the returned object will also implement |
| * {@link Locatable}. |
| */ |
| public static <A extends Annotation> A create( A annotation, Locatable parentSourcePos ) { |
| if(annotation==null) return null; |
| Class<? extends Annotation> type = annotation.annotationType(); |
| if(quicks.containsKey(type)) { |
| // use the existing proxy implementation if available |
| return (A)quicks.get(type).newInstance(parentSourcePos,annotation); |
| } |
| |
| // otherwise take the slow route |
| |
| ClassLoader cl = SecureLoader.getClassClassLoader(LocatableAnnotation.class); |
| |
| try { |
| Class loadableT = Class.forName(type.getName(), false, cl); |
| if(loadableT !=type) |
| return annotation; // annotation type not loadable from this class loader |
| |
| return (A)Proxy.newProxyInstance(cl, |
| new Class[]{ type, Locatable.class }, |
| new LocatableAnnotation(annotation,parentSourcePos)); |
| } catch (ClassNotFoundException e) { |
| // annotation not loadable |
| return annotation; |
| } catch (IllegalArgumentException e) { |
| // Proxy.newProxyInstance throws this if it cannot resolve this annotation |
| // in this classloader |
| return annotation; |
| } |
| |
| } |
| |
| LocatableAnnotation(Annotation core, Locatable upstream) { |
| this.core = core; |
| this.upstream = upstream; |
| } |
| |
| public Locatable getUpstream() { |
| return upstream; |
| } |
| |
| public Location getLocation() { |
| return this; |
| } |
| |
| public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { |
| try { |
| if(method.getDeclaringClass()==Locatable.class) |
| return method.invoke(this,args); |
| if(Modifier.isStatic(method.getModifiers())) |
| // malicious code can pass in a static Method object. |
| // doing method.invoke() would end up executing it, |
| // so we need to protect against it. |
| throw new IllegalArgumentException(); |
| |
| return method.invoke(core,args); |
| } catch (InvocationTargetException e) { |
| if(e.getTargetException()!=null) |
| throw e.getTargetException(); |
| throw e; |
| } |
| } |
| |
| public String toString() { |
| return core.toString(); |
| } |
| |
| |
| /** |
| * List of {@link Quick} implementations keyed by their annotation type. |
| */ |
| private static final Map<Class,Quick> quicks = new HashMap<Class, Quick>(); |
| |
| static { |
| for( Quick q : Init.getAll() ) { |
| quicks.put(q.annotationType(),q); |
| } |
| } |
| } |