234 lines
8.0 KiB
Java
234 lines
8.0 KiB
Java
/*
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* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.xml.internal.ws.util;
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import java.lang.reflect.Field;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.lang.reflect.Modifier;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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import java.util.concurrent.Callable;
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import javax.annotation.Resource;
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import javax.xml.ws.WebServiceException;
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/**
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* Encapsulates which field/method the injection is done, and performs the
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* injection.
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*/
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public abstract class InjectionPlan<T, R> {
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/**
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* Perform injection
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*
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* @param instance
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* Instance
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* @param resource
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* Resource
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*/
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public abstract void inject(T instance, R resource);
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/**
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* Perform injection, but resource is only generated if injection is
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* necessary.
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*
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* @param instance
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* @param resource
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*/
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public void inject(T instance, Callable<R> resource) {
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try {
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inject(instance, resource.call());
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} catch(Exception e) {
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throw new WebServiceException(e);
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}
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}
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/*
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* Injects to a field.
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*/
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public static class FieldInjectionPlan<T, R> extends
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InjectionPlan<T, R> {
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private final Field field;
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public FieldInjectionPlan(Field field) {
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this.field = field;
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}
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public void inject(final T instance, final R resource) {
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AccessController.doPrivileged(new PrivilegedAction<Object>() {
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public Object run() {
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try {
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if (!field.isAccessible()) {
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field.setAccessible(true);
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}
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field.set(instance, resource);
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return null;
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} catch (IllegalAccessException e) {
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throw new WebServiceException(e);
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}
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}
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});
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}
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}
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/*
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* Injects to a method.
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*/
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public static class MethodInjectionPlan<T, R> extends
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InjectionPlan<T, R> {
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private final Method method;
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public MethodInjectionPlan(Method method) {
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this.method = method;
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}
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public void inject(T instance, R resource) {
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invokeMethod(method, instance, resource);
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}
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}
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/*
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* Helper for invoking a method with elevated privilege.
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*/
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private static void invokeMethod(final Method method, final Object instance, final Object... args) {
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if(method==null) return;
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AccessController.doPrivileged(new PrivilegedAction<Void>() {
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public Void run() {
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try {
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if (!method.isAccessible()) {
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method.setAccessible(true);
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}
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method.invoke(instance,args);
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} catch (IllegalAccessException e) {
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throw new WebServiceException(e);
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} catch (InvocationTargetException e) {
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throw new WebServiceException(e);
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}
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return null;
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}
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});
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}
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/*
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* Combines multiple {@link InjectionPlan}s into one.
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*/
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private static class Compositor<T, R> extends InjectionPlan<T, R> {
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private final Collection<InjectionPlan<T, R>> children;
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public Compositor(Collection<InjectionPlan<T, R>> children) {
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this.children = children;
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}
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public void inject(T instance, R res) {
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for (InjectionPlan<T, R> plan : children)
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plan.inject(instance, res);
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}
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public void inject(T instance, Callable<R> resource) {
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if (!children.isEmpty()) {
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super.inject(instance, resource);
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}
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}
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}
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/*
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* Creates an {@link InjectionPlan} that injects the given resource type to the given class.
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*
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* @param isStatic
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* Only look for static field/method
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*
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*/
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public static <T,R>
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InjectionPlan<T,R> buildInjectionPlan(Class<? extends T> clazz, Class<R> resourceType, boolean isStatic) {
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List<InjectionPlan<T,R>> plan = new ArrayList<InjectionPlan<T,R>>();
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Class<?> cl = clazz;
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while(cl != Object.class) {
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for(Field field: cl.getDeclaredFields()) {
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Resource resource = field.getAnnotation(Resource.class);
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if (resource != null) {
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if(isInjectionPoint(resource, field.getType(),
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"Incorrect type for field"+field.getName(),
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resourceType)) {
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if(isStatic && !Modifier.isStatic(field.getModifiers()))
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throw new WebServiceException("Static resource "+resourceType+" cannot be injected to non-static "+field);
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plan.add(new FieldInjectionPlan<T,R>(field));
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}
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}
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}
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cl = cl.getSuperclass();
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}
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cl = clazz;
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while(cl != Object.class) {
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for(Method method : cl.getDeclaredMethods()) {
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Resource resource = method.getAnnotation(Resource.class);
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if (resource != null) {
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Class[] paramTypes = method.getParameterTypes();
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if (paramTypes.length != 1)
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throw new WebServiceException("Incorrect no of arguments for method "+method);
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if(isInjectionPoint(resource,paramTypes[0],
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"Incorrect argument types for method"+method.getName(),
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resourceType)) {
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if(isStatic && !Modifier.isStatic(method.getModifiers()))
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throw new WebServiceException("Static resource "+resourceType+" cannot be injected to non-static "+method);
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plan.add(new MethodInjectionPlan<T,R>(method));
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}
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}
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}
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cl = cl.getSuperclass();
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}
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return new Compositor<T,R>(plan);
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}
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/*
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* Returns true if the combination of {@link Resource} and the field/method type
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* are consistent for {@link WebServiceContext} injection.
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*/
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private static boolean isInjectionPoint(Resource resource, Class fieldType, String errorMessage, Class resourceType ) {
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Class t = resource.type();
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if (t.equals(Object.class)) {
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return fieldType.equals(resourceType);
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} else if (t.equals(resourceType)) {
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if (fieldType.isAssignableFrom(resourceType)) {
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return true;
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} else {
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// type compatibility error
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throw new WebServiceException(errorMessage);
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}
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}
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return false;
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}
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}
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