jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/xml/internal/bind/v2/model/annotation/LocatableAnnotation.java@e530533619ec

     1 /*

     2  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 package com.sun.xml.internal.bind.v2.model.annotation;

    28 import java.lang.annotation.Annotation;

    29 import java.lang.reflect.InvocationHandler;

    30 import java.lang.reflect.InvocationTargetException;

    31 import java.lang.reflect.Method;

    32 import java.lang.reflect.Proxy;

    33 import java.lang.reflect.Modifier;

    34 import java.util.HashMap;

    35 import java.util.Map;

    37 import com.sun.xml.internal.bind.v2.runtime.Location;

    39 /**

    40  * {@link Annotation} that also implements {@link Locatable}.

    41  *

    42  * @author Kohsuke Kawaguchi

    43  */

    44 public class LocatableAnnotation implements InvocationHandler, Locatable, Location {

    45     private final Annotation core;

    47     private final Locatable upstream;

    49     /**

    50      * Wraps the annotation into a proxy so that the returned object will also implement

    51      * {@link Locatable}.

    52      */

    53     public static <A extends Annotation> A create( A annotation, Locatable parentSourcePos ) {

    54         if(annotation==null)    return null;

    55         Class<? extends Annotation> type = annotation.annotationType();

    56         if(quicks.containsKey(type)) {

    57             // use the existing proxy implementation if available

    58             return (A)quicks.get(type).newInstance(parentSourcePos,annotation);

    59         }

    61         // otherwise take the slow route

    63         ClassLoader cl = SecureLoader.getClassClassLoader(LocatableAnnotation.class);

    65         try {

    66             Class loadableT = Class.forName(type.getName(), false, cl);

    67             if(loadableT !=type)

    68                 return annotation;  // annotation type not loadable from this class loader

    70             return (A)Proxy.newProxyInstance(cl,

    71                     new Class[]{ type, Locatable.class },

    72                     new LocatableAnnotation(annotation,parentSourcePos));

    73         } catch (ClassNotFoundException e) {

    74             // annotation not loadable

    75             return annotation;

    76         } catch (IllegalArgumentException e) {

    77             // Proxy.newProxyInstance throws this if it cannot resolve this annotation

    78             // in this classloader

    79             return annotation;

    80         }

    82     }

    84     LocatableAnnotation(Annotation core, Locatable upstream) {

    85         this.core = core;

    86         this.upstream = upstream;

    87     }

    89     public Locatable getUpstream() {

    90         return upstream;

    91     }

    93     public Location getLocation() {

    94         return this;

    95     }

    97     public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {

    98         try {

    99             if(method.getDeclaringClass()==Locatable.class)

   100                 return method.invoke(this,args);

   101             if(Modifier.isStatic(method.getModifiers()))

   102                 // malicious code can pass in a static Method object.

   103                 // doing method.invoke() would end up executing it,

   104                 // so we need to protect against it.

   105                 throw new IllegalArgumentException();

   107             return method.invoke(core,args);

   108         } catch (InvocationTargetException e) {

   109             if(e.getTargetException()!=null)

   110                 throw e.getTargetException();

   111             throw e;

   112         }

   113     }

   115     public String toString() {

   116         return core.toString();

   117     }

   120     /**

   121      * List of {@link Quick} implementations keyed by their annotation type.

   122      */

   123     private static final Map<Class,Quick> quicks = new HashMap<Class, Quick>();

   125     static {

   126         for( Quick q : Init.getAll() ) {

   127             quicks.put(q.annotationType(),q);

   128         }

   129     }

   130 }

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