/*
* JBoss, Home of Professional Open Source
* Copyright 2011, Red Hat, Inc. and/or its affiliates, and individual
* 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.solder.bean;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.enterprise.context.Dependent;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.spi.AnnotatedMethod;
import javax.enterprise.inject.spi.AnnotatedParameter;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.inject.Inject;
import org.apache.deltaspike.core.util.metadata.builder.ImmutableInjectionPoint;
import static org.jboss.solder.reflection.Reflections.isSerializable;
/**
* A set of utility methods for working with beans.
*
* @author Pete Muir
*/
public class Beans {
private Beans() {
}
/**
* Extract the qualifiers from a set of annotations.
*
* @param beanManager the beanManager to use to determine if an annotation is
* a qualifier
* @param annotations the annotations to check
* @return any qualifiers present in <code>annotations</code>
*/
public static Set<Annotation> getQualifiers(BeanManager beanManager, Iterable<Annotation>... annotations) {
Set<Annotation> qualifiers = new HashSet<Annotation>();
for (Iterable<Annotation> annotationSet : annotations) {
for (Annotation annotation : annotationSet) {
if (beanManager.isQualifier(annotation.annotationType())) {
qualifiers.add(annotation);
}
}
}
return qualifiers;
}
/**
* Extract the qualifiers from a set of annotations.
*
* @param beanManager the beanManager to use to determine if an annotation is
* a qualifier
* @param annotations the annotations to check
* @return any qualifiers present in <code>annotations</code>
*/
@SuppressWarnings("unchecked")
public static Set<Annotation> getQualifiers(BeanManager beanManager, Iterable<Annotation> annotations) {
return getQualifiers(beanManager, new Iterable[]{annotations});
}
/**
* Extract the qualifiers from a set of annotations.
*
* @param beanManager the beanManager to use to determine if an annotation is
* a qualifier
* @param annotations the annotations to check
* @return any qualifiers present in <code>annotations</code>
*/
public static Set<Annotation> getQualifiers(BeanManager beanManager, Annotation[]... annotations) {
Set<Annotation> qualifiers = new HashSet<Annotation>();
for (Annotation[] annotationArray : annotations) {
for (Annotation annotation : annotationArray) {
if (beanManager.isQualifier(annotation.annotationType())) {
qualifiers.add(annotation);
}
}
}
return qualifiers;
}
public static void checkReturnValue(Object instance, Bean<?> bean, InjectionPoint injectionPoint, BeanManager beanManager) {
if (instance == null && !Dependent.class.equals(bean.getScope())) {
throw new IllegalStateException("Cannot return null from a non-dependent producer method: " + bean);
} else if (instance != null) {
boolean passivating = beanManager.isPassivatingScope(bean.getScope());
boolean instanceSerializable = isSerializable(instance.getClass());
if (passivating && !instanceSerializable) {
throw new IllegalStateException("Producers cannot declare passivating scope and return a non-serializable class: " + bean);
}
if (injectionPoint != null && injectionPoint.getBean() != null) {
if (!instanceSerializable && beanManager.isPassivatingScope(injectionPoint.getBean().getScope())) {
if (injectionPoint.getMember() instanceof Field) {
if (!injectionPoint.isTransient() && instance != null && !instanceSerializable) {
throw new IllegalStateException("Producers cannot produce non-serializable instances for injection into non-transient fields of passivating beans. Producer " + bean + "at injection point " + injectionPoint);
}
} else if (injectionPoint.getMember() instanceof Method) {
Method method = (Method) injectionPoint.getMember();
if (method.isAnnotationPresent(Inject.class)) {
throw new IllegalStateException("Producers cannot produce non-serializable instances for injection into parameters of initializers of beans declaring passivating scope. Producer " + bean + "at injection point " + injectionPoint);
}
if (method.isAnnotationPresent(Produces.class)) {
throw new IllegalStateException("Producers cannot produce non-serializable instances for injection into parameters of producer methods declaring passivating scope. Producer " + bean + "at injection point " + injectionPoint);
}
} else if (injectionPoint.getMember() instanceof Constructor<?>) {
throw new IllegalStateException("Producers cannot produce non-serializable instances for injection into parameters of constructors of beans declaring passivating scope. Producer " + bean + "at injection point " + injectionPoint);
}
}
}
}
}
/**
* Given a method, and the bean on which the method is declared, create a
* collection of injection points representing the parameters of the method.
*
* @param <X> the type declaring the method
* @param method the method
* @param declaringBean the bean on which the method is declared
* @param beanManager the bean manager to use to create the injection points
* @return the injection points
*/
public static <X> List<InjectionPoint> createInjectionPoints(AnnotatedMethod<X> method, Bean<?> declaringBean, BeanManager beanManager) {
List<InjectionPoint> injectionPoints = new ArrayList<InjectionPoint>();
for (AnnotatedParameter<X> parameter : method.getParameters()) {
InjectionPoint injectionPoint = new ImmutableInjectionPoint(parameter, beanManager, declaringBean, false, false);
injectionPoints.add(injectionPoint);
}
return injectionPoints;
}
}