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