/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.webbeans.ejb.common.util;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import javax.decorator.Decorator;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.context.Dependent;
import javax.enterprise.inject.spi.AnnotatedMethod;
import javax.enterprise.inject.spi.AnnotatedType;
import javax.enterprise.inject.spi.ObserverMethod;
import javax.enterprise.inject.spi.SessionBeanType;
import javax.interceptor.Interceptor;
import org.apache.webbeans.ejb.common.component.BaseEjbBean;
import org.apache.webbeans.event.ObserverMethodImpl;
import org.apache.webbeans.exception.WebBeansConfigurationException;
import org.apache.webbeans.portable.AnnotatedElementFactory;
import org.apache.webbeans.util.AnnotationUtil;
import org.apache.webbeans.util.Asserts;
import org.apache.webbeans.util.ClassUtil;
/**
* Validates session beans.
*
* @version $Rev: 915746 $ $Date: 2010-02-24 12:43:43 +0200 (Wed, 24 Feb 2010) $
*/
public final class EjbValidator
{
// No-instaniate
private EjbValidator()
{
// Empty
}
/**
* Validates session bean's scope.
*
* @param ejbBean ejb bean
*/
public static void validateEjbScopeType(BaseEjbBean<?> ejbBean)
{
Asserts.assertNotNull(ejbBean, "Session Bean can not be null");
if (ejbBean.getScope() == null)
{
throw new NullPointerException("Session Bean scope can not be null");
}
if (ejbBean.getEjbType() == null)
{
throw new NullPointerException("Session Bean type can not be null. It must be one of @Stateless, @Stateful, @Singleton");
}
if (ejbBean.getEjbType().equals(SessionBeanType.STATELESS))
{
if (!ejbBean.getScope().equals(Dependent.class))
{
throw new WebBeansConfigurationException("Stateless Session Bean class : " + ejbBean.getReturnType() + " " + "can not define scope other than @Dependent");
}
}
else if (ejbBean.getEjbType().equals(SessionBeanType.SINGLETON))
{
if (!ejbBean.getScope().equals(Dependent.class) && !ejbBean.getScope().equals(ApplicationScoped.class))
{
throw new WebBeansConfigurationException("Singleton Session Bean class : " + ejbBean.getReturnType() + " "
+ "can not define scope other than @Dependent or @ApplicationScoped");
}
}
}
/**
* Validates session bean decorator/interceptor conditions.
*
* @param ejbClass ejb bean class
*/
public static void validateDecoratorOrInterceptor(Class<?> ejbClass)
{
Asserts.assertNotNull(ejbClass, "ejbClass parameter can not be null");
if (AnnotationUtil.hasClassAnnotation(ejbClass, Decorator.class))
{
throw new WebBeansConfigurationException(EjbConstants.EJB_WEBBEANS_ERROR_CLASS_PREFIX + ejbClass.getName() + " can not annotated with @Decorator");
}
if (AnnotationUtil.hasClassAnnotation(ejbClass, Interceptor.class))
{
throw new WebBeansConfigurationException(EjbConstants.EJB_WEBBEANS_ERROR_CLASS_PREFIX + ejbClass.getName() + " can not annotated with @Interceptor");
}
}
/**
* Check generic type conditions.
* @param ejbClass ebj class
* @param scopeType scope type
*/
public static void validateGenericBeanType(Class<?> ejbClass, Class<? extends Annotation> scopeType)
{
Asserts.assertNotNull(ejbClass, "ejbClass parameter can not be null");
Asserts.assertNotNull(ejbClass, "scopeType parameter can not be null");
if(ClassUtil.isDefinitionContainsTypeVariables(ejbClass))
{
if(!scopeType.equals(Dependent.class))
{
throw new WebBeansConfigurationException("Ejb generic bean class : " + ejbClass.getName() + "scope must be @Dependent");
}
}
}
public static <T> void validateObserverMethods(BaseEjbBean<?> bean, Set<ObserverMethod<T>> observers)
{
for(ObserverMethod<T> observer : observers)
{
ObserverMethodImpl<T> obs = (ObserverMethodImpl<T>)observer;
AnnotatedMethod<T> method = obs.getObserverMethod();
List<?> locals = bean.getBusinessLocalInterfaces();
if(locals != null)
{
Iterator<?> it = locals.iterator();
boolean found = false;
while(it.hasNext())
{
Class<?> clazz = (Class<?>)it.next();
Method classMethod = bean.getWebBeansContext().getSecurityService().
doPrivilegedGetDeclaredMethod(clazz, method.getJavaMember().getName(), method.getJavaMember().getParameterTypes());
if(classMethod == null)
{
continue;
}
else
{
//Should only be a single method that matches the names & params
AnnotatedElementFactory annotatedElementFactory = bean.getWebBeansContext().getAnnotatedElementFactory();
AnnotatedType<T> declaringType = (AnnotatedType<T>) annotatedElementFactory.newAnnotatedType(classMethod.getDeclaringClass());
obs.setObserverMethod(annotatedElementFactory.newAnnotatedMethod(classMethod, declaringType));
found = true;
break;
}
}
if(!found)
{
if(!method.isStatic())
{
throw new WebBeansConfigurationException("Observer method : " + method.getJavaMember().getName() + " in session bean class : " +
bean.getBeanClass() + " must be business method");
}
}
}
}
}
}