/*
* Copyright 2005-2006 Sun Microsystems, Inc. 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. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package com.sun.xml.internal.ws.server;
import com.sun.istack.internal.Nullable;
import com.sun.xml.internal.ws.api.server.InstanceResolver;
import com.sun.xml.internal.ws.api.server.ResourceInjector;
import com.sun.xml.internal.ws.api.server.WSEndpoint;
import com.sun.xml.internal.ws.resources.ServerMessages;
import com.sun.xml.internal.ws.util.localization.Localizable;
import javax.annotation.Resource;
import javax.xml.ws.WebServiceContext;
import javax.xml.ws.WebServiceException;
import java.lang.annotation.Annotation;
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;
/**
* Partial implementation of {@link InstanceResolver} with
* convenience methods to do the resource injection.
*
* @author Kohsuke Kawaguchi
*/
abstract class AbstractInstanceResolver<T> extends InstanceResolver<T> {
/**
* Encapsulates which field/method the injection is done,
* and performs the injection.
*/
protected static interface InjectionPlan<T,R> {
void inject(T instance,R resource);
/**
* Gets the number of injections to be performed.
*/
int count();
}
/**
* Injects to a field.
*/
protected static class FieldInjectionPlan<T,R> implements 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 ServerRtException("server.rt.err",e);
}
}
});
}
public int count() {
return 1;
}
}
/**
* Injects to a method.
*/
protected static class MethodInjectionPlan<T,R> implements 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);
}
public int count() {
return 1;
}
}
/**
* Combines multiple {@link InjectionPlan}s into one.
*/
private static class Compositor<T,R> implements InjectionPlan<T,R> {
private final InjectionPlan<T,R>[] children;
public Compositor(Collection<InjectionPlan<T,R>> children) {
this.children = children.toArray(new InjectionPlan[children.size()]);
}
public void inject(T instance, R res) {
for (InjectionPlan<T,R> plan : children)
plan.inject(instance,res);
}
public int count() {
int r = 0;
for (InjectionPlan<T, R> plan : children)
r += plan.count();
return r;
}
}
protected static ResourceInjector getResourceInjector(WSEndpoint endpoint) {
ResourceInjector ri = endpoint.getContainer().getSPI(ResourceInjector.class);
if(ri==null)
ri = ResourceInjector.STANDALONE;
return ri;
}
/**
* Helper for invoking a method with elevated privilege.
*/
protected static void invokeMethod(final @Nullable 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 ServerRtException("server.rt.err",e);
} catch (InvocationTargetException e) {
throw new ServerRtException("server.rt.err",e);
}
return null;
}
});
}
/**
* Finds the method that has the given annotation, while making sure that
* there's only at most one such method.
*/
protected final @Nullable Method findAnnotatedMethod(Class clazz, Class<? extends Annotation> annType) {
boolean once = false;
Method r = null;
for(Method method : clazz.getDeclaredMethods()) {
if (method.getAnnotation(annType) != null) {
if (once)
throw new ServerRtException(ServerMessages.ANNOTATION_ONLY_ONCE(annType));
if (method.getParameterTypes().length != 0)
throw new ServerRtException(ServerMessages.NOT_ZERO_PARAMETERS(method));
r = method;
once = true;
}
}
return r;
}
/**
* Creates an {@link InjectionPlan} that injects the given resource type to the given class.
*
* @param isStatic
* Only look for static field/method
*
*/
protected 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>>();
for(Field field: clazz.getDeclaredFields()) {
Resource resource = field.getAnnotation(Resource.class);
if (resource != null) {
if(isInjectionPoint(resource, field.getType(),
ServerMessages.localizableWRONG_FIELD_TYPE(field.getName()),resourceType)) {
if(isStatic && !Modifier.isStatic(field.getModifiers()))
throw new WebServiceException(ServerMessages.STATIC_RESOURCE_INJECTION_ONLY(resourceType,field));
plan.add(new FieldInjectionPlan<T,R>(field));
}
}
}
for(Method method : clazz.getDeclaredMethods()) {
Resource resource = method.getAnnotation(Resource.class);
if (resource != null) {
Class[] paramTypes = method.getParameterTypes();
if (paramTypes.length != 1)
throw new ServerRtException(ServerMessages.WRONG_NO_PARAMETERS(method));
if(isInjectionPoint(resource,paramTypes[0],
ServerMessages.localizableWRONG_PARAMETER_TYPE(method.getName()),resourceType)) {
if(isStatic && !Modifier.isStatic(method.getModifiers()))
throw new WebServiceException(ServerMessages.STATIC_RESOURCE_INJECTION_ONLY(resourceType,method));
plan.add(new MethodInjectionPlan<T,R>(method));
}
}
}
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, Localizable 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 ServerRtException(errorMessage);
}
}
return false;
}
}