/*
* JBoss, Home of Professional Open Source
* Copyright 2009 Red Hat Inc. and/or its affiliates and other contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.arquillian.testenricher.resource;
import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.List;
import java.util.logging.Logger;
import javax.annotation.Resource;
import javax.naming.Context;
import javax.naming.NamingException;
import org.jboss.arquillian.core.api.Instance;
import org.jboss.arquillian.core.api.annotation.Inject;
import org.jboss.arquillian.test.spi.TestEnricher;
/**
* Enricher that provide @Resource field and method argument injection. <br/>
* <br/>
* Field Resources will only be injected if the current value is NULL or primitive default value.
*
* @author <a href="mailto:aknutsen@redhat.com">Aslak Knutsen</a>
* @version $Revision: $
*/
public class ResourceInjectionEnricher implements TestEnricher {
private static final String RESOURCE_LOOKUP_PREFIX = "java:comp/env";
private static final String ANNOTATION_NAME = "javax.annotation.Resource";
private static final Logger log = Logger.getLogger(TestEnricher.class.getName());
@Inject
private Instance<Context> contextInst;
/* (non-Javadoc)
* @see org.jboss.arquillian.spi.TestEnricher#enrich(org.jboss.arquillian.spi.Context, java.lang.Object)
*/
public void enrich(Object testCase) {
if (SecurityActions.isClassPresent(ANNOTATION_NAME) && contextInst.get() != null) {
injectClass(testCase);
}
}
/* (non-Javadoc)
* @see org.jboss.arquillian.spi.TestEnricher#resolve(org.jboss.arquillian.spi.Context, java.lang.reflect.Method)
*/
public Object[] resolve(Method method) {
return new Object[method.getParameterTypes().length];
}
@SuppressWarnings("unchecked")
protected void injectClass(Object testCase) {
try {
ClassLoader classLoader = ResourceInjectionEnricher.class.getClassLoader();
Class<? extends Annotation> resourceAnnotation =
(Class<? extends Annotation>) classLoader.loadClass(ANNOTATION_NAME);
List<Field> annotatedFields = SecurityActions.getFieldsWithAnnotation(
testCase.getClass(),
resourceAnnotation);
for (Field field : annotatedFields) {
/*
* only try to lookup fields that are not already set or primitives
* (we don't really know if they have been set or not)
*/
Object currentValue = field.get(testCase);
if (shouldInject(field, currentValue)) {
try {
Object resource = resolveResource(field);
field.set(testCase, resource);
} catch (Exception e) {
log.fine("Could not lookup for "
+ field
+ ", other Enrichers might, move on. Exception: "
+ e.getMessage());
}
}
}
List<Method> methods = SecurityActions.getMethodsWithAnnotation(
testCase.getClass(),
resourceAnnotation);
for (Method method : methods) {
if (method.getParameterTypes().length != 1) {
throw new RuntimeException("@Resource only allowed on single argument methods");
}
if (!method.getName().startsWith("set")) {
throw new RuntimeException("@Resource only allowed on 'set' methods");
}
Object resource = resolveResource(method);
method.invoke(testCase, resource);
}
} catch (Exception e) {
throw new RuntimeException("Could not inject members", e);
}
}
/**
* Looks up the JNDI resource for any given annotated element.
*
* @param element
* any annotated element (field, method, etc.)
*
* @return the located resource
*
* @throws Exception
*/
protected Object resolveResource(AnnotatedElement element) throws Exception {
Object resolvedResource = null;
// This implementation is based on previous behavior in injectClass()
if (Field.class.isAssignableFrom(element.getClass())) {
resolvedResource = lookup(getResourceName((Field) element));
} else if (Method.class.isAssignableFrom(element.getClass())) {
resolvedResource = lookup(getResourceName(element.getAnnotation(Resource.class)));
}
return resolvedResource;
}
private boolean shouldInject(Field field, Object currentValue) {
Class<?> type = field.getType();
if (type.isPrimitive()) {
if (isPrimitiveNull(currentValue)) {
log.fine(
"Primitive field " + field.getName() + " has been detected to have the default primitive value, " +
"can not determine if it has already been injected. Re-injecting field.");
return true;
}
} else {
if (currentValue == null) {
return true;
}
}
return false;
}
private boolean isPrimitiveNull(Object currentValue) {
String stringValue = String.valueOf(currentValue);
if ("0".equals(stringValue) || "0.0".equals(stringValue) || "false".equals(stringValue)) {
return true;
} else if (Character.class.isInstance(currentValue)) {
if (Character.class.cast(currentValue) == (char) 0) {
return true;
}
}
return false;
}
protected Object lookup(String jndiName) throws Exception {
// TODO: figure out test context ?
Context context = getContainerContext();
return context.lookup(jndiName);
}
/**
* Obtains the appropriate context for the test. Can be overriden by
* enrichers for each container to provide the correct context.
*
* @return the test context
*
* @throws NamingException
*/
protected Context getContainerContext() throws NamingException {
return contextInst.get();
}
protected String getResourceName(Field field) {
Resource resource = field.getAnnotation(Resource.class);
String resourceName = getResourceName(resource);
if (resourceName != null) {
return resourceName;
}
String propertyName = field.getName();
String className = field.getDeclaringClass().getName();
return RESOURCE_LOOKUP_PREFIX + "/" + className + "/" + propertyName;
}
protected String getResourceName(Resource resource) {
String mappedName = resource.mappedName();
if (!mappedName.equals("")) {
return mappedName;
}
String name = resource.name();
if (!name.equals("")) {
return RESOURCE_LOOKUP_PREFIX + "/" + name;
}
return null;
}
}