org.jboss.weld.bean.AbstractBean Maven / Gradle / Ivy
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* JBoss, Home of Professional Open Source
* Copyright 2008, 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;
import java.lang.annotation.Annotation;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.HashSet;
import java.util.Set;
import javax.enterprise.context.Dependent;
import javax.enterprise.inject.Specializes;
import javax.enterprise.inject.spi.Annotated;
import javax.enterprise.inject.spi.BeanAttributes;
import javax.enterprise.inject.spi.ProcessBeanAttributes;
import javax.enterprise.inject.spi.Producer;
import javax.inject.Named;
import org.jboss.weld.annotated.enhanced.EnhancedAnnotated;
import org.jboss.weld.bean.attributes.ImmutableBeanAttributes;
import org.jboss.weld.bootstrap.BeanDeployerEnvironment;
import org.jboss.weld.bootstrap.SpecializationAndEnablementRegistry;
import org.jboss.weld.logging.BeanLogger;
import org.jboss.weld.manager.BeanManagerImpl;
import org.jboss.weld.resolution.TypeEqualitySpecializationUtils;
import org.jboss.weld.serialization.spi.BeanIdentifier;
/**
* An abstract bean representation common for all beans
*
* @param the type of bean
* @param the Class of the bean type
* @author Pete Muir
* @author Ales Justin
* @author Jozef Hartinger
*/
public abstract class AbstractBean extends RIBean {
protected Class type;
private boolean preInitialized;
private boolean proxyRequired;
private Producer producer;
/**
* Constructor
*
* @param beanManager The Bean manager
*/
public AbstractBean(BeanAttributes attributes, BeanIdentifier identifier, BeanManagerImpl beanManager) {
super(attributes, identifier, beanManager);
}
/**
* Initializes specialization. This method is called before {@link ProcessBeanAttributes} is fired and also after the event
* if the {@link BeanAttributes} have been altered.
*/
@Override
public void preInitialize() {
synchronized (this) {
if (isSpecializing() && !preInitialized) {
preInitialized = true;
preSpecialize();
specialize();
checkSpecialization();
postSpecialize();
}
}
}
/**
* Initializes the bean and its metadata
*/
@Override
public void internalInitialize(BeanDeployerEnvironment environment) {
preInitialize();
BeanLogger.LOG.creatingBean(getType());
if (getScope() != null) {
proxyRequired = isNormalScoped();
} else {
proxyRequired = false;
}
BeanLogger.LOG.qualifiersUsed(getQualifiers(), this);
BeanLogger.LOG.usingName(getName(), this);
BeanLogger.LOG.usingScope(getScope(), this);
}
@Override
public void initializeAfterBeanDiscovery() {
checkType();
}
protected abstract void checkType();
/**
* Validates specialization if this bean specializes another bean.
*/
public void checkSpecialization() {
if (isSpecializing()) {
boolean isNameDefined = getAnnotated().isAnnotationPresent(Named.class);
String previousSpecializedBeanName = null;
for (AbstractBean specializedBean : getSpecializedBeans()) {
String name = specializedBean.getName();
if (previousSpecializedBeanName != null && name != null && !previousSpecializedBeanName.equals(specializedBean.getName())) {
// there may be multiple beans specialized by this bean - make sure they all share the same name
throw BeanLogger.LOG.beansWithDifferentBeanNamesCannotBeSpecialized(previousSpecializedBeanName, specializedBean.getName(), this);
}
previousSpecializedBeanName = name;
if (isNameDefined && name != null) {
throw BeanLogger.LOG.nameNotAllowedOnSpecialization(getAnnotated());
}
// When a specializing bean extends the raw type of a generic superclass, types of the generic superclass are
// added into types of the specializing bean because of assignability rules. However, ParameterizedTypes among
// these types are NOT types of the specializing bean (that's the way java works)
boolean rawInsteadOfGeneric = (this instanceof AbstractClassBean
&& specializedBean.getBeanClass().getTypeParameters().length > 0
&& !(((AbstractClassBean) this).getBeanClass().getGenericSuperclass() instanceof ParameterizedType));
for (Type specializedType : specializedBean.getTypes()) {
if (rawInsteadOfGeneric && specializedType instanceof ParameterizedType) {
throw BeanLogger.LOG.specializingBeanMissingSpecializedType(this, specializedType, specializedBean);
}
boolean contains = getTypes().contains(specializedType);
if (!contains) {
for (Type specializingType : getTypes()) {
// In case 'type' is a ParameterizedType, two bean types equivalent in the CDI sense may not be
// equal in the java sense. Therefore we have to use our own equality util.
if (TypeEqualitySpecializationUtils.areTheSame(specializingType, specializedType)) {
contains = true;
break;
}
}
}
if (!contains) {
throw BeanLogger.LOG.specializingBeanMissingSpecializedType(this, specializedType, specializedBean);
}
}
}
}
}
protected void postSpecialize() {
// override qualifiers
Set qualifiers = new HashSet();
qualifiers.addAll(attributes().getQualifiers());
// override name
String name = attributes().getName();
for (AbstractBean specializedBean : getSpecializedBeans()) {
qualifiers.addAll(specializedBean.getQualifiers());
if (specializedBean.getName() != null) {
name = specializedBean.getName();
}
}
setAttributes(new ImmutableBeanAttributes(qualifiers, name, attributes()));
}
protected void preSpecialize() {
}
protected void specialize() {
}
/**
* Returns the annotated item the bean represents
*
* @return The annotated item
*/
public abstract Annotated getAnnotated();
/**
* Returns the weld-enhanced annotated item the bean represents. The item is only available during bootstrap.
* The method throws {@link IllegalStateException} at runtime.
*
* @throws IllegalStateException when invoked at runtime
* @return The annotated item
*/
public abstract EnhancedAnnotated getEnhancedAnnotated();
protected Set> getSpecializedBeans() {
return getBeanManager().getServices().get(SpecializationAndEnablementRegistry.class).resolveSpecializedBeans(this);
}
/**
* Gets the type of the bean
*
* @return The type
*/
@Override
public Class getType() {
return type;
}
@Override
public boolean isDependent() {
return Dependent.class.equals(getScope());
}
public boolean isSpecializing() {
return getAnnotated().isAnnotationPresent(Specializes.class);
}
@Override
public boolean isProxyRequired() {
return proxyRequired;
}
public Producer getProducer() {
return producer;
}
/**
* Set a Producer for this bean. This operation is *not* threadsafe, and should not be called outside bootstrap.
*/
public void setProducer(Producer producer) {
this.producer = producer;
}
}