/*
* JBoss, Home of Professional Open Source
* Copyright 2010, Red Hat, Inc., 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.weld.bean.attributes;
import java.beans.Introspector;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import javax.enterprise.context.Dependent;
import javax.enterprise.context.NormalScope;
import javax.enterprise.inject.spi.BeanAttributes;
import javax.inject.Named;
import javax.inject.Qualifier;
import javax.inject.Scope;
import org.jboss.weld.annotated.enhanced.EnhancedAnnotated;
import org.jboss.weld.annotated.enhanced.EnhancedAnnotatedField;
import org.jboss.weld.annotated.enhanced.EnhancedAnnotatedMethod;
import org.jboss.weld.annotated.enhanced.EnhancedAnnotatedType;
import org.jboss.weld.ejb.InternalEjbDescriptor;
import org.jboss.weld.literal.AnyLiteral;
import org.jboss.weld.literal.DefaultLiteral;
import org.jboss.weld.literal.NamedLiteral;
import org.jboss.weld.literal.NewLiteral;
import org.jboss.weld.logging.BeanLogger;
import org.jboss.weld.manager.BeanManagerImpl;
import org.jboss.weld.metadata.cache.MergedStereotypes;
import org.jboss.weld.resources.SharedObjectCache;
import org.jboss.weld.util.Beans;
import org.jboss.weld.util.collections.ImmutableSet;
import org.jboss.weld.util.reflection.Reflections;
/**
* Creates {@link BeanAttributes} based on a given annotated.
*
* @author Jozef Hartinger
*/
public class BeanAttributesFactory {
private static final Set<Annotation> DEFAULT_QUALIFIERS = ImmutableSet.of(AnyLiteral.INSTANCE, DefaultLiteral.INSTANCE);
private BeanAttributesFactory() {
}
/**
* Creates new {@link BeanAttributes} to represent a managed bean.
*/
public static <T> BeanAttributes<T> forBean(EnhancedAnnotated<T, ?> annotated, BeanManagerImpl manager) {
return new BeanAttributesBuilder<T>(annotated, null, manager).build();
}
/**
* Creates new {@link BeanAttributes} to represent a session bean.
*/
public static <T> BeanAttributes<T> forSessionBean(EnhancedAnnotatedType<T> annotated, InternalEjbDescriptor<?> descriptor, BeanManagerImpl manager) {
return new BeanAttributesBuilder<T>(annotated, Reflections.<InternalEjbDescriptor<T>> cast(descriptor), manager).build();
}
public static <T> BeanAttributes<T> forNewBean(Set<Type> types, final Class<?> javaClass) {
Set<Annotation> qualifiers = Collections.<Annotation>singleton(new NewLiteral(javaClass));
return new ImmutableBeanAttributes<T>(Collections.<Class<? extends Annotation>> emptySet(), false, null, qualifiers, types, Dependent.class);
}
public static <T> BeanAttributes<T> forNewManagedBean(EnhancedAnnotatedType<T> weldClass, BeanManagerImpl manager) {
return forNewBean(SharedObjectCache.instance(manager).getSharedSet(Beans.getTypes(weldClass)), weldClass.getJavaClass());
}
public static <T> BeanAttributes<T> forNewSessionBean(BeanAttributes<T> originalAttributes, Class<?> javaClass) {
return forNewBean(originalAttributes.getTypes(), javaClass);
}
private static class BeanAttributesBuilder<T> {
private MergedStereotypes<T, ?> mergedStereotypes;
private boolean alternative;
private String name;
private Set<Annotation> qualifiers;
private Set<Type> types;
private Class<? extends Annotation> scope;
private BeanManagerImpl manager;
private BeanAttributesBuilder(EnhancedAnnotated<T, ?> annotated, InternalEjbDescriptor<T> descriptor, BeanManagerImpl manager) {
this.manager = manager;
initStereotypes(annotated, manager);
initAlternative(annotated);
initName(annotated);
initQualifiers(annotated);
initScope(annotated);
if (descriptor == null) {
types = SharedObjectCache.instance(manager).getSharedSet(Beans.getTypes(annotated));
} else {
types = SharedObjectCache.instance(manager).getSharedSet(Beans.getTypes(annotated, descriptor));
}
}
protected <S> void initStereotypes(EnhancedAnnotated<T, S> annotated, BeanManagerImpl manager) {
this.mergedStereotypes = MergedStereotypes.of(annotated, manager);
}
protected void initAlternative(EnhancedAnnotated<T, ?> annotated) {
this.alternative = Beans.isAlternative(annotated, mergedStereotypes);
}
/**
* Initializes the name
*/
protected void initName(EnhancedAnnotated<T, ?> annotated) {
boolean beanNameDefaulted = false;
if (annotated.isAnnotationPresent(Named.class)) {
String javaName = annotated.getAnnotation(Named.class).value();
if ("".equals(javaName)) {
beanNameDefaulted = true;
} else {
this.name = javaName;
return;
}
}
if (beanNameDefaulted || (mergedStereotypes != null && mergedStereotypes.isBeanNameDefaulted())) {
this.name = getDefaultName(annotated);
}
}
/**
* Gets the default name of the bean
*
* @return The default name
*/
protected String getDefaultName(EnhancedAnnotated<?, ?> annotated) {
if (annotated instanceof EnhancedAnnotatedType<?>) {
return Introspector.decapitalize(((EnhancedAnnotatedType<?>) annotated).getSimpleName());
} else if (annotated instanceof EnhancedAnnotatedField<?, ?>) {
return ((EnhancedAnnotatedField<?, ?>) annotated).getPropertyName();
} else if (annotated instanceof EnhancedAnnotatedMethod<?, ?>) {
return ((EnhancedAnnotatedMethod<?, ?>) annotated).getPropertyName();
} else {
return null;
}
}
protected void initQualifiers(Set<Annotation> qualifiers) {
if (qualifiers.isEmpty()) {
this.qualifiers = DEFAULT_QUALIFIERS;
} else {
Set<Annotation> normalizedQualifiers = new HashSet<Annotation>(qualifiers.size() + 2);
if (qualifiers.size() == 1) {
if (qualifiers.iterator().next().annotationType().equals(Named.class)) {
normalizedQualifiers.add(DefaultLiteral.INSTANCE);
}
}
normalizedQualifiers.addAll(qualifiers);
normalizedQualifiers.add(AnyLiteral.INSTANCE);
if (name != null && normalizedQualifiers.remove(NamedLiteral.DEFAULT)) {
normalizedQualifiers.add(new NamedLiteral(name));
}
this.qualifiers = SharedObjectCache.instance(manager).getSharedSet(normalizedQualifiers);
}
}
protected void initQualifiers(EnhancedAnnotated<?, ?> annotated) {
initQualifiers(annotated.getMetaAnnotations(Qualifier.class));
}
protected void initScope(EnhancedAnnotated<T, ?> annotated) {
// class bean
if (annotated instanceof EnhancedAnnotatedType<?>) {
EnhancedAnnotatedType<?> weldClass = (EnhancedAnnotatedType<?>) annotated;
for (EnhancedAnnotatedType<?> clazz = weldClass; clazz != null; clazz = clazz.getEnhancedSuperclass()) {
Set<Annotation> scopes = new HashSet<Annotation>();
scopes.addAll(clazz.getDeclaredMetaAnnotations(Scope.class));
scopes.addAll(clazz.getDeclaredMetaAnnotations(NormalScope.class));
validateScopeSet(scopes, annotated);
if (scopes.size() == 1) {
if (annotated.isAnnotationPresent(scopes.iterator().next().annotationType())) {
this.scope = scopes.iterator().next().annotationType();
}
break;
}
}
} else {
// producer field or method
Set<Annotation> scopes = new HashSet<Annotation>();
scopes.addAll(annotated.getMetaAnnotations(Scope.class));
scopes.addAll(annotated.getMetaAnnotations(NormalScope.class));
if (scopes.size() == 1) {
this.scope = scopes.iterator().next().annotationType();
}
validateScopeSet(scopes, annotated);
}
if (this.scope == null) {
initScopeFromStereotype();
}
if (this.scope == null) {
this.scope = Dependent.class;
}
}
protected void validateScopeSet(Set<Annotation> scopes, EnhancedAnnotated<T, ?> annotated) {
if (scopes.size() > 1) {
throw BeanLogger.LOG.onlyOneScopeAllowed(annotated);
}
}
protected boolean initScopeFromStereotype() {
Set<Annotation> possibleScopes = mergedStereotypes.getPossibleScopes();
if (possibleScopes.size() == 1) {
this.scope = possibleScopes.iterator().next().annotationType();
return true;
} else if (possibleScopes.size() > 1) {
throw BeanLogger.LOG.multipleScopesFoundFromStereotypes(mergedStereotypes);
} else {
return false;
}
}
public BeanAttributes<T> build() {
return new ImmutableBeanAttributes<T>(mergedStereotypes.getStereotypes(), alternative, name, qualifiers, types, scope);
}
}
}