Mercurial > jdk8-mips64-public > jaxws / file revision

 /*

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  * 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

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 package com.sun.xml.internal.ws.util;

 import java.lang.reflect.Field;

 import java.lang.reflect.InvocationTargetException;

 import java.lang.reflect.Method;

 import java.lang.reflect.Modifier;

 import java.security.AccessController;

 import java.security.PrivilegedAction;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.List;

 import java.util.concurrent.Callable;

 import javax.annotation.Resource;

 import javax.xml.ws.WebServiceException;

 /**

  * Encapsulates which field/method the injection is done, and performs the

  * injection.

  */

 public abstract class InjectionPlan<T, R> {

     /**

      * Perform injection

      *

      * @param instance

      *            Instance

      * @param resource

      *            Resource

      */

     public abstract void inject(T instance, R resource);

     /**

      * Perform injection, but resource is only generated if injection is

      * necessary.

      *

      * @param instance

      * @param resource

      */

     public void inject(T instance, Callable<R> resource) {

         try {

             inject(instance, resource.call());

         } catch(Exception e) {

             throw new WebServiceException(e);

         }

     }

     /*

      * Injects to a field.

      */

     public static class FieldInjectionPlan<T, R> extends

             InjectionPlan<T, R> {

         private final Field field;

         public FieldInjectionPlan(Field field) {

             this.field = field;

         }

         public void inject(final T instance, final R resource) {

             AccessController.doPrivileged(new PrivilegedAction<Object>() {

                 public Object run() {

                     try {

                         if (!field.isAccessible()) {

                             field.setAccessible(true);

                         }

                         field.set(instance, resource);

                         return null;

                     } catch (IllegalAccessException e) {

                         throw new WebServiceException(e);

                     }

                 }

             });

         }

     }

     /*

      * Injects to a method.

      */

     public static class MethodInjectionPlan<T, R> extends

             InjectionPlan<T, R> {

         private final Method method;

         public MethodInjectionPlan(Method method) {

             this.method = method;

         }

         public void inject(T instance, R resource) {

             invokeMethod(method, instance, resource);

         }

     }

     /*

      * Helper for invoking a method with elevated privilege.

      */

     private static void invokeMethod(final Method method, final Object instance, final Object... args) {

         if(method==null)    return;

         AccessController.doPrivileged(new PrivilegedAction<Void>() {

             public Void run() {

                 try {

                     if (!method.isAccessible()) {

                         method.setAccessible(true);

                     }

                     method.invoke(instance,args);

                 } catch (IllegalAccessException e) {

                     throw new WebServiceException(e);

                 } catch (InvocationTargetException e) {

                     throw new WebServiceException(e);

                 }

                 return null;

             }

         });

     }

     /*

      * Combines multiple {@link InjectionPlan}s into one.

      */

     private static class Compositor<T, R> extends InjectionPlan<T, R> {

         private final Collection<InjectionPlan<T, R>> children;

         public Compositor(Collection<InjectionPlan<T, R>> children) {

             this.children = children;

         }

         public void inject(T instance, R res) {

             for (InjectionPlan<T, R> plan : children)

                 plan.inject(instance, res);

         }

         public void inject(T instance, Callable<R> resource) {

             if (!children.isEmpty()) {

                 super.inject(instance, resource);

             }

         }

     }

     /*

      * Creates an {@link InjectionPlan} that injects the given resource type to the given class.

      *

      * @param isStatic

      *      Only look for static field/method

      *

      */

     public static <T,R>

     InjectionPlan<T,R> buildInjectionPlan(Class<? extends T> clazz, Class<R> resourceType, boolean isStatic) {

         List<InjectionPlan<T,R>> plan = new ArrayList<InjectionPlan<T,R>>();

         Class<?> cl = clazz;

         while(cl != Object.class) {

             for(Field field: cl.getDeclaredFields()) {

                 Resource resource = field.getAnnotation(Resource.class);

                 if (resource != null) {

                     if(isInjectionPoint(resource, field.getType(),

                         "Incorrect type for field"+field.getName(),

                         resourceType)) {

                         if(isStatic && !Modifier.isStatic(field.getModifiers()))

                             throw new WebServiceException("Static resource "+resourceType+" cannot be injected to non-static "+field);

                         plan.add(new FieldInjectionPlan<T,R>(field));

                     }

                 }

             }

             cl = cl.getSuperclass();

         }

         cl = clazz;

         while(cl != Object.class) {

             for(Method method : cl.getDeclaredMethods()) {

                 Resource resource = method.getAnnotation(Resource.class);

                 if (resource != null) {

                     Class[] paramTypes = method.getParameterTypes();

                     if (paramTypes.length != 1)

                         throw new WebServiceException("Incorrect no of arguments for method "+method);

                     if(isInjectionPoint(resource,paramTypes[0],

                         "Incorrect argument types for method"+method.getName(),

                         resourceType)) {

                         if(isStatic && !Modifier.isStatic(method.getModifiers()))

                             throw new WebServiceException("Static resource "+resourceType+" cannot be injected to non-static "+method);

                         plan.add(new MethodInjectionPlan<T,R>(method));

                     }

                 }

             }

             cl = cl.getSuperclass();

         }

         return new Compositor<T,R>(plan);

     }

     /*

      * Returns true if the combination of {@link Resource} and the field/method type

      * are consistent for {@link WebServiceContext} injection.

      */

     private static boolean isInjectionPoint(Resource resource, Class fieldType, String errorMessage, Class resourceType ) {

         Class t = resource.type();

         if (t.equals(Object.class)) {

             return fieldType.equals(resourceType);

         } else if (t.equals(resourceType)) {

             if (fieldType.isAssignableFrom(resourceType)) {

                 return true;

             } else {

                 // type compatibility error

                 throw new WebServiceException(errorMessage);

             }

         }

         return false;

     }

 }