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/*
* Copyright 2002-2023 the original author or authors.
*
* 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
*
* https://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.springframework.context.annotation;
import java.lang.annotation.Annotation;
import java.util.LinkedHashSet;
import java.util.Set;
import org.springframework.beans.factory.annotation.AnnotatedBeanDefinition;
import org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanDefinitionHolder;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.context.event.DefaultEventListenerFactory;
import org.springframework.context.event.EventListenerMethodProcessor;
import org.springframework.context.support.GenericApplicationContext;
import org.springframework.core.annotation.AnnotationAttributes;
import org.springframework.core.annotation.AnnotationAwareOrderComparator;
import org.springframework.core.type.AnnotatedTypeMetadata;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.lang.Nullable;
import org.springframework.util.ClassUtils;
/**
* Utility class that allows for convenient registration of common
* {@link org.springframework.beans.factory.config.BeanPostProcessor} and
* {@link org.springframework.beans.factory.config.BeanFactoryPostProcessor}
* definitions for annotation-based configuration. Also registers a common
* {@link org.springframework.beans.factory.support.AutowireCandidateResolver}.
*
* @author Mark Fisher
* @author Juergen Hoeller
* @author Chris Beams
* @author Phillip Webb
* @author Stephane Nicoll
* @author Sam Brannen
* @since 2.5
* @see ContextAnnotationAutowireCandidateResolver
* @see ConfigurationClassPostProcessor
* @see CommonAnnotationBeanPostProcessor
* @see org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor
* @see org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor
*/
public abstract class AnnotationConfigUtils {
/**
* The bean name of the internally managed Configuration annotation processor.
*/
public static final String CONFIGURATION_ANNOTATION_PROCESSOR_BEAN_NAME =
"org.springframework.context.annotation.internalConfigurationAnnotationProcessor";
/**
* The bean name of the internally managed BeanNameGenerator for use when processing
* {@link Configuration} classes. Set by {@link AnnotationConfigApplicationContext}
* and {@code AnnotationConfigWebApplicationContext} during bootstrap in order to make
* any custom name generation strategy available to the underlying
* {@link ConfigurationClassPostProcessor}.
* @since 3.1.1
*/
public static final String CONFIGURATION_BEAN_NAME_GENERATOR =
"org.springframework.context.annotation.internalConfigurationBeanNameGenerator";
/**
* The bean name of the internally managed Autowired annotation processor.
*/
public static final String AUTOWIRED_ANNOTATION_PROCESSOR_BEAN_NAME =
"org.springframework.context.annotation.internalAutowiredAnnotationProcessor";
/**
* The bean name of the internally managed common annotation processor.
*/
public static final String COMMON_ANNOTATION_PROCESSOR_BEAN_NAME =
"org.springframework.context.annotation.internalCommonAnnotationProcessor";
/**
* The bean name of the internally managed JPA annotation processor.
*/
public static final String PERSISTENCE_ANNOTATION_PROCESSOR_BEAN_NAME =
"org.springframework.context.annotation.internalPersistenceAnnotationProcessor";
private static final String PERSISTENCE_ANNOTATION_PROCESSOR_CLASS_NAME =
"org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor";
/**
* The bean name of the internally managed @EventListener annotation processor.
*/
public static final String EVENT_LISTENER_PROCESSOR_BEAN_NAME =
"org.springframework.context.event.internalEventListenerProcessor";
/**
* The bean name of the internally managed EventListenerFactory.
*/
public static final String EVENT_LISTENER_FACTORY_BEAN_NAME =
"org.springframework.context.event.internalEventListenerFactory";
private static final ClassLoader classLoader = AnnotationConfigUtils.class.getClassLoader();
private static final boolean jakartaAnnotationsPresent =
ClassUtils.isPresent("jakarta.annotation.PostConstruct", classLoader);
private static final boolean jsr250Present =
ClassUtils.isPresent("javax.annotation.PostConstruct", classLoader);
private static final boolean jpaPresent =
ClassUtils.isPresent("jakarta.persistence.EntityManagerFactory", classLoader) &&
ClassUtils.isPresent(PERSISTENCE_ANNOTATION_PROCESSOR_CLASS_NAME, classLoader);
/**
* Register all relevant annotation post processors in the given registry.
* @param registry the registry to operate on
*/
public static void registerAnnotationConfigProcessors(BeanDefinitionRegistry registry) {
registerAnnotationConfigProcessors(registry, null);
}
/**
* Register all relevant annotation post processors in the given registry.
* @param registry the registry to operate on
* @param source the configuration source element (already extracted)
* that this registration was triggered from. May be {@code null}.
* @return a Set of BeanDefinitionHolders, containing all bean definitions
* that have actually been registered by this call
*/
public static Set registerAnnotationConfigProcessors(
BeanDefinitionRegistry registry, @Nullable Object source) {
DefaultListableBeanFactory beanFactory = unwrapDefaultListableBeanFactory(registry);
if (beanFactory != null) {
if (!(beanFactory.getDependencyComparator() instanceof AnnotationAwareOrderComparator)) {
beanFactory.setDependencyComparator(AnnotationAwareOrderComparator.INSTANCE);
}
if (!(beanFactory.getAutowireCandidateResolver() instanceof ContextAnnotationAutowireCandidateResolver)) {
beanFactory.setAutowireCandidateResolver(new ContextAnnotationAutowireCandidateResolver());
}
}
Set beanDefs = new LinkedHashSet<>(8);
if (!registry.containsBeanDefinition(CONFIGURATION_ANNOTATION_PROCESSOR_BEAN_NAME)) {
RootBeanDefinition def = new RootBeanDefinition(ConfigurationClassPostProcessor.class);
def.setSource(source);
beanDefs.add(registerPostProcessor(registry, def, CONFIGURATION_ANNOTATION_PROCESSOR_BEAN_NAME));
}
if (!registry.containsBeanDefinition(AUTOWIRED_ANNOTATION_PROCESSOR_BEAN_NAME)) {
RootBeanDefinition def = new RootBeanDefinition(AutowiredAnnotationBeanPostProcessor.class);
def.setSource(source);
beanDefs.add(registerPostProcessor(registry, def, AUTOWIRED_ANNOTATION_PROCESSOR_BEAN_NAME));
}
// Check for Jakarta Annotations support, and if present add the CommonAnnotationBeanPostProcessor.
if ((jakartaAnnotationsPresent || jsr250Present) &&
!registry.containsBeanDefinition(COMMON_ANNOTATION_PROCESSOR_BEAN_NAME)) {
RootBeanDefinition def = new RootBeanDefinition(CommonAnnotationBeanPostProcessor.class);
def.setSource(source);
beanDefs.add(registerPostProcessor(registry, def, COMMON_ANNOTATION_PROCESSOR_BEAN_NAME));
}
// Check for JPA support, and if present add the PersistenceAnnotationBeanPostProcessor.
if (jpaPresent && !registry.containsBeanDefinition(PERSISTENCE_ANNOTATION_PROCESSOR_BEAN_NAME)) {
RootBeanDefinition def = new RootBeanDefinition();
try {
def.setBeanClass(ClassUtils.forName(PERSISTENCE_ANNOTATION_PROCESSOR_CLASS_NAME,
AnnotationConfigUtils.class.getClassLoader()));
}
catch (ClassNotFoundException ex) {
throw new IllegalStateException(
"Cannot load optional framework class: " + PERSISTENCE_ANNOTATION_PROCESSOR_CLASS_NAME, ex);
}
def.setSource(source);
beanDefs.add(registerPostProcessor(registry, def, PERSISTENCE_ANNOTATION_PROCESSOR_BEAN_NAME));
}
if (!registry.containsBeanDefinition(EVENT_LISTENER_PROCESSOR_BEAN_NAME)) {
RootBeanDefinition def = new RootBeanDefinition(EventListenerMethodProcessor.class);
def.setSource(source);
beanDefs.add(registerPostProcessor(registry, def, EVENT_LISTENER_PROCESSOR_BEAN_NAME));
}
if (!registry.containsBeanDefinition(EVENT_LISTENER_FACTORY_BEAN_NAME)) {
RootBeanDefinition def = new RootBeanDefinition(DefaultEventListenerFactory.class);
def.setSource(source);
beanDefs.add(registerPostProcessor(registry, def, EVENT_LISTENER_FACTORY_BEAN_NAME));
}
return beanDefs;
}
private static BeanDefinitionHolder registerPostProcessor(
BeanDefinitionRegistry registry, RootBeanDefinition definition, String beanName) {
definition.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
registry.registerBeanDefinition(beanName, definition);
return new BeanDefinitionHolder(definition, beanName);
}
@Nullable
private static DefaultListableBeanFactory unwrapDefaultListableBeanFactory(BeanDefinitionRegistry registry) {
if (registry instanceof DefaultListableBeanFactory dlbf) {
return dlbf;
}
else if (registry instanceof GenericApplicationContext gac) {
return gac.getDefaultListableBeanFactory();
}
else {
return null;
}
}
public static void processCommonDefinitionAnnotations(AnnotatedBeanDefinition abd) {
processCommonDefinitionAnnotations(abd, abd.getMetadata());
}
static void processCommonDefinitionAnnotations(AnnotatedBeanDefinition abd, AnnotatedTypeMetadata metadata) {
AnnotationAttributes lazy = attributesFor(metadata, Lazy.class);
if (lazy != null) {
abd.setLazyInit(lazy.getBoolean("value"));
}
else if (abd.getMetadata() != metadata) {
lazy = attributesFor(abd.getMetadata(), Lazy.class);
if (lazy != null) {
abd.setLazyInit(lazy.getBoolean("value"));
}
}
if (metadata.isAnnotated(Primary.class.getName())) {
abd.setPrimary(true);
}
AnnotationAttributes dependsOn = attributesFor(metadata, DependsOn.class);
if (dependsOn != null) {
abd.setDependsOn(dependsOn.getStringArray("value"));
}
AnnotationAttributes role = attributesFor(metadata, Role.class);
if (role != null) {
abd.setRole(role.getNumber("value").intValue());
}
AnnotationAttributes description = attributesFor(metadata, Description.class);
if (description != null) {
abd.setDescription(description.getString("value"));
}
}
static BeanDefinitionHolder applyScopedProxyMode(
ScopeMetadata metadata, BeanDefinitionHolder definition, BeanDefinitionRegistry registry) {
ScopedProxyMode scopedProxyMode = metadata.getScopedProxyMode();
if (scopedProxyMode.equals(ScopedProxyMode.NO)) {
return definition;
}
boolean proxyTargetClass = scopedProxyMode.equals(ScopedProxyMode.TARGET_CLASS);
return ScopedProxyCreator.createScopedProxy(definition, registry, proxyTargetClass);
}
@Nullable
static AnnotationAttributes attributesFor(AnnotatedTypeMetadata metadata, Class annotationType) {
return attributesFor(metadata, annotationType.getName());
}
@Nullable
static AnnotationAttributes attributesFor(AnnotatedTypeMetadata metadata, String annotationTypeName) {
return AnnotationAttributes.fromMap(metadata.getAnnotationAttributes(annotationTypeName));
}
static Set attributesForRepeatable(AnnotationMetadata metadata,
Class annotationType, Class containerType) {
return metadata.getMergedRepeatableAnnotationAttributes(annotationType, containerType, false);
}
static Set attributesForRepeatable(AnnotationMetadata metadata,
Class annotationType, Class containerType,
boolean sortByReversedMetaDistance) {
return metadata.getMergedRepeatableAnnotationAttributes(annotationType, containerType, false, sortByReversedMetaDistance);
}
}
