/*
* Copyright 2002-2015 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
*
* 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.springframework.beans.factory.support;
import com.google.common.base.Optional;
import java.io.IOException;
import java.io.NotSerializableException;
import java.io.ObjectInputStream;
import java.io.ObjectStreamException;
import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.lang.ref.Reference;
import java.lang.ref.WeakReference;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.IdentityHashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import javax.inject.Provider;
import org.springframework.beans.BeansException;
import org.springframework.beans.FatalBeanException;
import org.springframework.beans.TypeConverter;
import org.springframework.beans.factory.BeanCreationException;
import org.springframework.beans.factory.BeanCurrentlyInCreationException;
import org.springframework.beans.factory.BeanDefinitionStoreException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.BeanFactoryUtils;
import org.springframework.beans.factory.CannotLoadBeanClassException;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.NoUniqueBeanDefinitionException;
import org.springframework.beans.factory.ObjectFactory;
import org.springframework.beans.factory.SmartFactoryBean;
import org.springframework.beans.factory.SmartInitializingSingleton;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanDefinitionHolder;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.config.DependencyDescriptor;
import org.springframework.core.OrderComparator;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.lang.UsesJava8;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
import org.springframework.util.CompositeIterator;
import org.springframework.util.ObjectUtils;
import org.springframework.util.StringUtils;
/**
* Repackaged version from the Spring framework which includes temporal fix for <a href="https://jira.spring.io/browse/SPR-12970">
* Spring Issue SPR-12970</a>, which was the root cause for MULE-8556.
* <p/>
* This is to be removed when we upgrade to a Spring version which fixes it
*
* @author Rod Johnson
* @author Juergen Hoeller
* @author Sam Brannen
* @author Costin Leau
* @author Chris Beams
* @author Phillip Webb
* @author Stephane Nicoll
* @see StaticListableBeanFactory
* @see PropertiesBeanDefinitionReader
* @see org.springframework.beans.factory.xml.XmlBeanDefinitionReader
* @since 16 April 2001
*/
@SuppressWarnings("serial")
public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFactory
implements ConfigurableListableBeanFactory, BeanDefinitionRegistry, Serializable {
private static Class<?> javaUtilOptionalClass = null;
private static Class<?> javaxInjectProviderClass = null;
static {
try {
javaUtilOptionalClass = ClassUtils.forName("java.util.Optional", DefaultListableBeanFactory.class.getClassLoader());
} catch (ClassNotFoundException ex) {
// Java 8 not available - Optional references simply not supported then.
}
try {
javaxInjectProviderClass = ClassUtils.forName("javax.inject.Provider", DefaultListableBeanFactory.class.getClassLoader());
} catch (ClassNotFoundException ex) {
// JSR-330 API not available - Provider interface simply not supported then.
}
}
/** Map from serialized id to factory instance */
private static final Map<String, Reference<DefaultListableBeanFactory>> serializableFactories =
new ConcurrentHashMap<String, Reference<DefaultListableBeanFactory>>(8);
/** Optional id for this factory, for serialization purposes */
private String serializationId;
/** Whether to allow re-registration of a different definition with the same name */
private boolean allowBeanDefinitionOverriding = true;
/** Whether to allow eager class loading even for lazy-init beans */
private boolean allowEagerClassLoading = true;
/** Optional OrderComparator for dependency Lists and arrays */
private Comparator<Object> dependencyComparator;
/** Resolver to use for checking if a bean definition is an autowire candidate */
private AutowireCandidateResolver autowireCandidateResolver = new SimpleAutowireCandidateResolver();
/** Map from dependency type to corresponding autowired value */
private final Map<Class<?>, Object> resolvableDependencies = new HashMap<Class<?>, Object>(16);
/** Map of bean definition objects, keyed by bean name */
private final Map<String, BeanDefinition> beanDefinitionMap = new ConcurrentHashMap<String, BeanDefinition>(64);
/** Map of singleton and non-singleton bean names, keyed by dependency type */
private final Map<Class<?>, String[]> allBeanNamesByType = new ConcurrentHashMap<Class<?>, String[]>(64);
/** Map of singleton-only bean names, keyed by dependency type */
private final Map<Class<?>, String[]> singletonBeanNamesByType = new ConcurrentHashMap<Class<?>, String[]>(64);
/** List of bean definition names, in registration order */
private final List<String> beanDefinitionNames = new ArrayList<String>(64);
/** List of names of manually registered singletons, in registration order */
private final Set<String> manualSingletonNames = Collections.synchronizedSet(new LinkedHashSet<String>(16));
/** Whether bean definition metadata may be cached for all beans */
private boolean configurationFrozen = false;
/** Cached array of bean definition names in case of frozen configuration */
private String[] frozenBeanDefinitionNames;
/**
* Create a new DefaultListableBeanFactory.
*/
public DefaultListableBeanFactory() {
super();
}
/**
* Create a new DefaultListableBeanFactory with the given parent.
*
* @param parentBeanFactory the parent BeanFactory
*/
public DefaultListableBeanFactory(BeanFactory parentBeanFactory) {
super(parentBeanFactory);
}
/**
* Specify an id for serialization purposes, allowing this BeanFactory to be deserialized from this id back into the BeanFactory
* object, if needed.
*/
public void setSerializationId(String serializationId) {
if (serializationId != null) {
serializableFactories.put(serializationId, new WeakReference<DefaultListableBeanFactory>(this));
} else if (this.serializationId != null) {
serializableFactories.remove(this.serializationId);
}
this.serializationId = serializationId;
}
/**
* Return an id for serialization purposes, if specified, allowing this BeanFactory to be deserialized from this id back into
* the BeanFactory object, if needed.
*
* @since 4.1.2
*/
public String getSerializationId() {
return this.serializationId;
}
/**
* Set whether it should be allowed to override bean definitions by registering a different definition with the same name,
* automatically replacing the former. If not, an exception will be thrown. This also applies to overriding aliases.
* <p>
* Default is "true".
*
* @see #registerBeanDefinition
*/
public void setAllowBeanDefinitionOverriding(boolean allowBeanDefinitionOverriding) {
this.allowBeanDefinitionOverriding = allowBeanDefinitionOverriding;
}
/**
* Return whether it should be allowed to override bean definitions by registering a different definition with the same name,
* automatically replacing the former.
*
* @since 4.1.2
*/
public boolean isAllowBeanDefinitionOverriding() {
return this.allowBeanDefinitionOverriding;
}
/**
* Set whether the factory is allowed to eagerly load bean classes even for bean definitions that are marked as "lazy-init".
* <p>
* Default is "true". Turn this flag off to suppress class loading for lazy-init beans unless such a bean is explicitly
* requested. In particular, by-type lookups will then simply ignore bean definitions without resolved class name, instead of
* loading the bean classes on demand just to perform a type check.
*
* @see AbstractBeanDefinition#setLazyInit
*/
public void setAllowEagerClassLoading(boolean allowEagerClassLoading) {
this.allowEagerClassLoading = allowEagerClassLoading;
}
/**
* Return whether the factory is allowed to eagerly load bean classes even for bean definitions that are marked as "lazy-init".
*
* @since 4.1.2
*/
public boolean isAllowEagerClassLoading() {
return this.allowEagerClassLoading;
}
/**
* Set a {@link java.util.Comparator} for dependency Lists and arrays.
*
* @see org.springframework.core.OrderComparator
* @see org.springframework.core.annotation.AnnotationAwareOrderComparator
*/
public void setDependencyComparator(Comparator<Object> dependencyComparator) {
this.dependencyComparator = dependencyComparator;
}
/**
* Return the dependency comparator for this BeanFactory (may be {@code null}.
*/
public Comparator<Object> getDependencyComparator() {
return this.dependencyComparator;
}
/**
* Set a custom autowire candidate resolver for this BeanFactory to use when deciding whether a bean definition should be
* considered as a candidate for autowiring.
*/
public void setAutowireCandidateResolver(final AutowireCandidateResolver autowireCandidateResolver) {
Assert.notNull(autowireCandidateResolver, "AutowireCandidateResolver must not be null");
if (autowireCandidateResolver instanceof BeanFactoryAware) {
if (System.getSecurityManager() != null) {
final BeanFactory target = this;
AccessController.doPrivileged(new PrivilegedAction<Object>() {
@Override
public Object run() {
((BeanFactoryAware) autowireCandidateResolver).setBeanFactory(target);
return null;
}
}, getAccessControlContext());
} else {
((BeanFactoryAware) autowireCandidateResolver).setBeanFactory(this);
}
}
this.autowireCandidateResolver = autowireCandidateResolver;
}
/**
* Return the autowire candidate resolver for this BeanFactory (never {@code null}).
*/
public AutowireCandidateResolver getAutowireCandidateResolver() {
return this.autowireCandidateResolver;
}
@Override
public void copyConfigurationFrom(ConfigurableBeanFactory otherFactory) {
super.copyConfigurationFrom(otherFactory);
if (otherFactory instanceof DefaultListableBeanFactory) {
DefaultListableBeanFactory otherListableFactory = (DefaultListableBeanFactory) otherFactory;
this.allowBeanDefinitionOverriding = otherListableFactory.allowBeanDefinitionOverriding;
this.allowEagerClassLoading = otherListableFactory.allowEagerClassLoading;
this.autowireCandidateResolver = otherListableFactory.autowireCandidateResolver;
this.resolvableDependencies.putAll(otherListableFactory.resolvableDependencies);
}
}
// ---------------------------------------------------------------------
// Implementation of remaining BeanFactory methods
// ---------------------------------------------------------------------
@Override
public <T> T getBean(Class<T> requiredType) throws BeansException {
return getBean(requiredType, (Object[]) null);
}
@Override
public <T> T getBean(Class<T> requiredType, Object... args) throws BeansException {
Assert.notNull(requiredType, "Required type must not be null");
String[] beanNames = getBeanNamesForType(requiredType);
if (beanNames.length > 1) {
ArrayList<String> autowireCandidates = new ArrayList<String>();
for (String beanName : beanNames) {
if (!containsBeanDefinition(beanName) || getBeanDefinition(beanName).isAutowireCandidate()) {
autowireCandidates.add(beanName);
}
}
if (autowireCandidates.size() > 0) {
beanNames = autowireCandidates.toArray(new String[autowireCandidates.size()]);
}
}
if (beanNames.length == 1) {
return getBean(beanNames[0], requiredType, args);
} else if (beanNames.length > 1) {
Map<String, Object> candidates = new HashMap<String, Object>();
for (String beanName : beanNames) {
candidates.put(beanName, getBean(beanName, requiredType, args));
}
String primaryCandidate = determinePrimaryCandidate(candidates, requiredType);
if (primaryCandidate != null) {
return getBean(primaryCandidate, requiredType, args);
}
String priorityCandidate = determineHighestPriorityCandidate(candidates, requiredType);
if (priorityCandidate != null) {
return getBean(priorityCandidate, requiredType, args);
}
throw new NoUniqueBeanDefinitionException(requiredType, candidates.keySet());
} else if (getParentBeanFactory() != null) {
return getParentBeanFactory().getBean(requiredType, args);
} else {
throw new NoSuchBeanDefinitionException(requiredType);
}
}
@Override
public boolean containsBeanDefinition(String beanName) {
Assert.notNull(beanName, "Bean name must not be null");
return this.beanDefinitionMap.containsKey(beanName);
}
@Override
public int getBeanDefinitionCount() {
return this.beanDefinitionMap.size();
}
@Override
public String[] getBeanDefinitionNames() {
if (this.frozenBeanDefinitionNames != null) {
return this.frozenBeanDefinitionNames;
} else {
return StringUtils.toStringArray(this.beanDefinitionNames);
}
}
@Override
public String[] getBeanNamesForType(Class<?> type) {
return getBeanNamesForType(type, true, true);
}
@Override
public String[] getBeanNamesForType(Class<?> type, boolean includeNonSingletons, boolean allowEagerInit) {
if (!isConfigurationFrozen() || type == null || !allowEagerInit) {
return doGetBeanNamesForType(type, includeNonSingletons, allowEagerInit);
}
Map<Class<?>, String[]> cache = (includeNonSingletons ? this.allBeanNamesByType : this.singletonBeanNamesByType);
String[] resolvedBeanNames = cache.get(type);
if (resolvedBeanNames != null) {
return resolvedBeanNames;
}
resolvedBeanNames = doGetBeanNamesForType(type, includeNonSingletons, allowEagerInit);
if (ClassUtils.isCacheSafe(type, getBeanClassLoader())) {
cache.put(type, resolvedBeanNames);
}
return resolvedBeanNames;
}
private String[] doGetBeanNamesForType(Class<?> type, boolean includeNonSingletons, boolean allowEagerInit) {
List<String> result = new ArrayList<String>();
// Check all bean definitions.
for (String beanName : this.beanDefinitionNames) {
// Only consider bean as eligible if the bean name
// is not defined as alias for some other bean.
if (!isAlias(beanName)) {
try {
RootBeanDefinition mbd = getMergedLocalBeanDefinition(beanName);
// Only check bean definition if it is complete.
if (!mbd.isAbstract() && (allowEagerInit || ((mbd.hasBeanClass() || !mbd.isLazyInit() || isAllowEagerClassLoading()))
&& !requiresEagerInitForType(mbd.getFactoryBeanName()))) {
// In case of FactoryBean, match object created by FactoryBean.
boolean isFactoryBean = isFactoryBean(beanName, mbd);
boolean matchFound = (allowEagerInit || !isFactoryBean || containsSingleton(beanName))
&& (includeNonSingletons || isSingleton(beanName)) && isTypeMatch(beanName, type);
if (!matchFound && isFactoryBean) {
// In case of FactoryBean, try to match FactoryBean instance itself next.
beanName = FACTORY_BEAN_PREFIX + beanName;
matchFound = (includeNonSingletons || mbd.isSingleton()) && isTypeMatch(beanName, type);
}
if (matchFound) {
result.add(beanName);
}
}
} catch (CannotLoadBeanClassException ex) {
if (allowEagerInit) {
throw ex;
}
// Probably contains a placeholder: let's ignore it for type matching purposes.
if (this.logger.isDebugEnabled()) {
this.logger.debug("Ignoring bean class loading failure for bean '" + beanName + "'", ex);
}
onSuppressedException(ex);
} catch (BeanDefinitionStoreException ex) {
if (allowEagerInit) {
throw ex;
}
// Probably contains a placeholder: let's ignore it for type matching purposes.
if (this.logger.isDebugEnabled()) {
this.logger.debug("Ignoring unresolvable metadata in bean definition '" + beanName + "'", ex);
}
onSuppressedException(ex);
}
}
}
synchronized (manualSingletonNames) {
// Check manually registered singletons too.
for (String beanName : this.manualSingletonNames) {
try {
// In case of FactoryBean, match object created by FactoryBean.
if (isFactoryBean(beanName)) {
if ((includeNonSingletons || isSingleton(beanName)) && isTypeMatch(beanName, type)) {
result.add(beanName);
// Match found for this bean: do not match FactoryBean itself anymore.
continue;
}
// In case of FactoryBean, try to match FactoryBean itself next.
beanName = FACTORY_BEAN_PREFIX + beanName;
}
// Match raw bean instance (might be raw FactoryBean).
if (isTypeMatch(beanName, type)) {
result.add(beanName);
}
} catch (NoSuchBeanDefinitionException ex) {
// Shouldn't happen - probably a result of circular reference resolution...
if (logger.isDebugEnabled()) {
logger.debug("Failed to check manually registered singleton with name '" + beanName + "'", ex);
}
}
}
}
return StringUtils.toStringArray(result);
}
/**
* Check whether the specified bean would need to be eagerly initialized in order to determine its type.
*
* @param factoryBeanName a factory-bean reference that the bean definition defines a factory method for
* @return whether eager initialization is necessary
*/
private boolean requiresEagerInitForType(String factoryBeanName) {
return (factoryBeanName != null && isFactoryBean(factoryBeanName) && !containsSingleton(factoryBeanName));
}
@Override
public <T> Map<String, T> getBeansOfType(Class<T> type) throws BeansException {
return getBeansOfType(type, true, true);
}
@Override
public <T> Map<String, T> getBeansOfType(Class<T> type, boolean includeNonSingletons, boolean allowEagerInit)
throws BeansException {
String[] beanNames = getBeanNamesForType(type, includeNonSingletons, allowEagerInit);
Map<String, T> result = new LinkedHashMap<String, T>(beanNames.length);
for (String beanName : beanNames) {
try {
result.put(beanName, getBean(beanName, type));
} catch (BeanCreationException ex) {
Throwable rootCause = ex.getMostSpecificCause();
if (rootCause instanceof BeanCurrentlyInCreationException) {
BeanCreationException bce = (BeanCreationException) rootCause;
if (isCurrentlyInCreation(bce.getBeanName())) {
if (this.logger.isDebugEnabled()) {
this.logger.debug("Ignoring match to currently created bean '" + beanName + "': " + ex.getMessage());
}
onSuppressedException(ex);
// Ignore: indicates a circular reference when autowiring constructors.
// We want to find matches other than the currently created bean itself.
continue;
}
}
throw ex;
}
}
return result;
}
@Override
public String[] getBeanNamesForAnnotation(Class<? extends Annotation> annotationType) {
List<String> results = new ArrayList<String>();
for (String beanName : this.beanDefinitionNames) {
BeanDefinition beanDefinition = getBeanDefinition(beanName);
if (!beanDefinition.isAbstract() && findAnnotationOnBean(beanName, annotationType) != null) {
results.add(beanName);
}
}
synchronized (manualSingletonNames) {
for (String beanName : this.manualSingletonNames) {
if (!results.contains(beanName) && findAnnotationOnBean(beanName, annotationType) != null) {
results.add(beanName);
}
}
}
return results.toArray(new String[results.size()]);
}
@Override
public Map<String, Object> getBeansWithAnnotation(Class<? extends Annotation> annotationType) {
String[] beanNames = getBeanNamesForAnnotation(annotationType);
Map<String, Object> results = new LinkedHashMap<String, Object>(beanNames.length);
for (String beanName : beanNames) {
results.put(beanName, getBean(beanName));
}
return results;
}
/**
* Find a {@link Annotation} of {@code annotationType} on the specified bean, traversing its interfaces and super classes if no
* annotation can be found on the given class itself, as well as checking its raw bean class if not found on the exposed bean
* reference (e.g. in case of a proxy).
*/
@Override
public <A extends Annotation> A findAnnotationOnBean(String beanName, Class<A> annotationType)
throws NoSuchBeanDefinitionException {
A ann = null;
Class<?> beanType = getType(beanName);
if (beanType != null) {
ann = AnnotationUtils.findAnnotation(beanType, annotationType);
}
if (ann == null && containsBeanDefinition(beanName)) {
BeanDefinition bd = getMergedBeanDefinition(beanName);
if (bd instanceof AbstractBeanDefinition) {
AbstractBeanDefinition abd = (AbstractBeanDefinition) bd;
if (abd.hasBeanClass()) {
ann = AnnotationUtils.findAnnotation(abd.getBeanClass(), annotationType);
}
}
}
return ann;
}
// ---------------------------------------------------------------------
// Implementation of ConfigurableListableBeanFactory interface
// ---------------------------------------------------------------------
@Override
public void registerResolvableDependency(Class<?> dependencyType, Object autowiredValue) {
Assert.notNull(dependencyType, "Type must not be null");
if (autowiredValue != null) {
Assert.isTrue((autowiredValue instanceof ObjectFactory || dependencyType.isInstance(autowiredValue)),
"Value [" + autowiredValue + "] does not implement specified type [" + dependencyType.getName() + "]");
this.resolvableDependencies.put(dependencyType, autowiredValue);
}
}
@Override
public boolean isAutowireCandidate(String beanName, DependencyDescriptor descriptor) throws NoSuchBeanDefinitionException {
return isAutowireCandidate(beanName, descriptor, getAutowireCandidateResolver());
}
/**
* Determine whether the specified bean definition qualifies as an autowire candidate, to be injected into other beans which
* declare a dependency of matching type.
*
* @param beanName the name of the bean definition to check
* @param descriptor the descriptor of the dependency to resolve
* @param resolver the AutowireCandidateResolver to use for the actual resolution algorithm
* @return whether the bean should be considered as autowire candidate
*/
protected boolean isAutowireCandidate(String beanName, DependencyDescriptor descriptor, AutowireCandidateResolver resolver)
throws NoSuchBeanDefinitionException {
String beanDefinitionName = BeanFactoryUtils.transformedBeanName(beanName);
if (containsBeanDefinition(beanDefinitionName)) {
return isAutowireCandidate(beanName, getMergedLocalBeanDefinition(beanDefinitionName), descriptor, resolver);
} else if (containsSingleton(beanName)) {
return isAutowireCandidate(beanName, new RootBeanDefinition(getType(beanName)), descriptor, resolver);
} else if (getParentBeanFactory() instanceof DefaultListableBeanFactory) {
// No bean definition found in this factory -> delegate to parent.
return ((DefaultListableBeanFactory) getParentBeanFactory()).isAutowireCandidate(beanName, descriptor, resolver);
} else if (getParentBeanFactory() instanceof ConfigurableListableBeanFactory) {
// If no DefaultListableBeanFactory, can't pass the resolver along.
return ((ConfigurableListableBeanFactory) getParentBeanFactory()).isAutowireCandidate(beanName, descriptor);
} else {
return true;
}
}
/**
* Determine whether the specified bean definition qualifies as an autowire candidate, to be injected into other beans which
* declare a dependency of matching type.
*
* @param beanName the name of the bean definition to check
* @param mbd the merged bean definition to check
* @param descriptor the descriptor of the dependency to resolve
* @param resolver the AutowireCandidateResolver to use for the actual resolution algorithm
* @return whether the bean should be considered as autowire candidate
*/
protected boolean isAutowireCandidate(String beanName, RootBeanDefinition mbd, DependencyDescriptor descriptor,
AutowireCandidateResolver resolver) {
String beanDefinitionName = BeanFactoryUtils.transformedBeanName(beanName);
resolveBeanClass(mbd, beanDefinitionName);
if (mbd.isFactoryMethodUnique) {
boolean resolve;
synchronized (mbd.constructorArgumentLock) {
resolve = (mbd.resolvedConstructorOrFactoryMethod == null);
}
if (resolve) {
new ConstructorResolver(this).resolveFactoryMethodIfPossible(mbd);
}
}
return resolver.isAutowireCandidate(new BeanDefinitionHolder(mbd, beanName, getAliases(beanDefinitionName)), descriptor);
}
@Override
public BeanDefinition getBeanDefinition(String beanName) throws NoSuchBeanDefinitionException {
BeanDefinition bd = this.beanDefinitionMap.get(beanName);
if (bd == null) {
if (this.logger.isTraceEnabled()) {
this.logger.trace("No bean named '" + beanName + "' found in " + this);
}
throw new NoSuchBeanDefinitionException(beanName);
}
return bd;
}
@Override
public Iterator<String> getBeanNamesIterator() {
CompositeIterator<String> iterator = new CompositeIterator<String>();
iterator.add(this.beanDefinitionNames.iterator());
synchronized (manualSingletonNames) {
iterator.add(new ArrayList<>(manualSingletonNames).iterator());
}
return iterator;
}
@Override
public void freezeConfiguration() {
this.configurationFrozen = true;
this.frozenBeanDefinitionNames = StringUtils.toStringArray(this.beanDefinitionNames);
}
@Override
public boolean isConfigurationFrozen() {
return this.configurationFrozen;
}
/**
* Considers all beans as eligible for metadata caching if the factory's configuration has been marked as frozen.
*
* @see #freezeConfiguration()
*/
@Override
protected boolean isBeanEligibleForMetadataCaching(String beanName) {
return (this.configurationFrozen || super.isBeanEligibleForMetadataCaching(beanName));
}
@Override
public void preInstantiateSingletons() throws BeansException {
if (this.logger.isDebugEnabled()) {
this.logger.debug("Pre-instantiating singletons in " + this);
}
// Iterate over a copy to allow for init methods which in turn register new bean definitions.
// While this may not be part of the regular factory bootstrap, it does otherwise work fine.
List<String> beanNames = new ArrayList<String>(this.beanDefinitionNames);
// Trigger initialization of all non-lazy singleton beans...
for (String beanName : beanNames) {
RootBeanDefinition bd = getMergedLocalBeanDefinition(beanName);
if (!bd.isAbstract() && bd.isSingleton() && !bd.isLazyInit()) {
if (isFactoryBean(beanName)) {
final FactoryBean<?> factory = (FactoryBean<?>) getBean(FACTORY_BEAN_PREFIX + beanName);
boolean isEagerInit;
if (System.getSecurityManager() != null && factory instanceof SmartFactoryBean) {
isEagerInit = AccessController.doPrivileged(new PrivilegedAction<Boolean>() {
@Override
public Boolean run() {
return ((SmartFactoryBean<?>) factory).isEagerInit();
}
}, getAccessControlContext());
} else {
isEagerInit = (factory instanceof SmartFactoryBean && ((SmartFactoryBean<?>) factory).isEagerInit());
}
if (isEagerInit) {
getBean(beanName);
}
} else {
getBean(beanName);
}
}
}
// Trigger post-initialization callback for all applicable beans...
for (String beanName : beanNames) {
Object singletonInstance = getSingleton(beanName);
if (singletonInstance instanceof SmartInitializingSingleton) {
final SmartInitializingSingleton smartSingleton = (SmartInitializingSingleton) singletonInstance;
if (System.getSecurityManager() != null) {
AccessController.doPrivileged(new PrivilegedAction<Object>() {
@Override
public Object run() {
smartSingleton.afterSingletonsInstantiated();
return null;
}
}, getAccessControlContext());
} else {
smartSingleton.afterSingletonsInstantiated();
}
}
}
}
// ---------------------------------------------------------------------
// Implementation of BeanDefinitionRegistry interface
// ---------------------------------------------------------------------
@Override
public void registerBeanDefinition(String beanName, BeanDefinition beanDefinition) throws BeanDefinitionStoreException {
Assert.hasText(beanName, "Bean name must not be empty");
Assert.notNull(beanDefinition, "BeanDefinition must not be null");
if (beanDefinition instanceof AbstractBeanDefinition) {
try {
((AbstractBeanDefinition) beanDefinition).validate();
} catch (BeanDefinitionValidationException ex) {
throw new BeanDefinitionStoreException(beanDefinition.getResourceDescription(), beanName,
"Validation of bean definition failed", ex);
}
}
BeanDefinition oldBeanDefinition;
oldBeanDefinition = this.beanDefinitionMap.get(beanName);
if (oldBeanDefinition != null) {
if (!isAllowBeanDefinitionOverriding()) {
throw new BeanDefinitionStoreException(beanDefinition.getResourceDescription(), beanName,
"Cannot register bean definition [" + beanDefinition + "] for bean '" + beanName
+ "': There is already [" + oldBeanDefinition + "] bound.");
} else if (oldBeanDefinition.getRole() < beanDefinition.getRole()) {
// e.g. was ROLE_APPLICATION, now overriding with ROLE_SUPPORT or ROLE_INFRASTRUCTURE
if (this.logger.isWarnEnabled()) {
this.logger.warn("Overriding user-defined bean definition for bean '" + beanName
+ "' with a framework-generated bean definition: replacing [" + oldBeanDefinition + "] with [" + beanDefinition
+ "]");
}
} else {
if (this.logger.isInfoEnabled()) {
this.logger.info("Overriding bean definition for bean '" + beanName + "': replacing [" + oldBeanDefinition + "] with ["
+ beanDefinition + "]");
}
}
} else {
this.beanDefinitionNames.add(beanName);
this.manualSingletonNames.remove(beanName);
this.frozenBeanDefinitionNames = null;
}
this.beanDefinitionMap.put(beanName, beanDefinition);
if (oldBeanDefinition != null || containsSingleton(beanName)) {
resetBeanDefinition(beanName);
}
}
@Override
public void removeBeanDefinition(String beanName) throws NoSuchBeanDefinitionException {
Assert.hasText(beanName, "'beanName' must not be empty");
BeanDefinition bd = this.beanDefinitionMap.remove(beanName);
if (bd == null) {
if (this.logger.isTraceEnabled()) {
this.logger.trace("No bean named '" + beanName + "' found in " + this);
}
throw new NoSuchBeanDefinitionException(beanName);
}
this.beanDefinitionNames.remove(beanName);
this.frozenBeanDefinitionNames = null;
resetBeanDefinition(beanName);
}
/**
* Reset all bean definition caches for the given bean, including the caches of beans that are derived from it.
*
* @param beanName the name of the bean to reset
*/
protected void resetBeanDefinition(String beanName) {
// Remove the merged bean definition for the given bean, if already created.
clearMergedBeanDefinition(beanName);
// Remove corresponding bean from singleton cache, if any. Shouldn't usually
// be necessary, rather just meant for overriding a context's default beans
// (e.g. the default StaticMessageSource in a StaticApplicationContext).
destroySingleton(beanName);
// Reset all bean definitions that have the given bean as parent (recursively).
for (String bdName : this.beanDefinitionNames) {
if (!beanName.equals(bdName)) {
BeanDefinition bd = this.beanDefinitionMap.get(bdName);
if (beanName.equals(bd.getParentName())) {
resetBeanDefinition(bdName);
}
}
}
}
/**
* Only allows alias overriding if bean definition overriding is allowed.
*/
@Override
protected boolean allowAliasOverriding() {
return isAllowBeanDefinitionOverriding();
}
@Override
public void registerSingleton(String beanName, Object singletonObject) throws IllegalStateException {
super.registerSingleton(beanName, singletonObject);
if (!this.beanDefinitionMap.containsKey(beanName)) {
this.manualSingletonNames.add(beanName);
}
clearByTypeCache();
}
@Override
public void destroySingleton(String beanName) {
super.destroySingleton(beanName);
this.manualSingletonNames.remove(beanName);
clearByTypeCache();
}
@Override
public void destroySingletons() {
super.destroySingletons();
this.manualSingletonNames.clear();
clearByTypeCache();
}
/**
* Remove any assumptions about by-type mappings.
*/
private void clearByTypeCache() {
this.allBeanNamesByType.clear();
this.singletonBeanNamesByType.clear();
}
// ---------------------------------------------------------------------
// Dependency resolution functionality
// ---------------------------------------------------------------------
@Override
public Object resolveDependency(DependencyDescriptor descriptor, String beanName, Set<String> autowiredBeanNames,
TypeConverter typeConverter)
throws BeansException {
descriptor.initParameterNameDiscovery(getParameterNameDiscoverer());
if (descriptor.getDependencyType().equals(javaUtilOptionalClass)) {
return new OptionalDependencyFactory().createOptionalDependency(descriptor, beanName);
} else if (descriptor.getDependencyType().equals(ObjectFactory.class)) {
return new DependencyObjectFactory(descriptor, beanName);
} else if (descriptor.getDependencyType().equals(javaxInjectProviderClass)) {
return new DependencyProviderFactory().createDependencyProvider(descriptor, beanName);
} else {
Object result = getAutowireCandidateResolver().getLazyResolutionProxyIfNecessary(descriptor, beanName);
if (result == null) {
result = doResolveDependency(descriptor, beanName, autowiredBeanNames, typeConverter);
}
return result;
}
}
public Object doResolveDependency(DependencyDescriptor descriptor, String beanName, Set<String> autowiredBeanNames,
TypeConverter typeConverter)
throws BeansException {
Class<?> type = descriptor.getDependencyType();
Object value = getAutowireCandidateResolver().getSuggestedValue(descriptor);
if (value != null) {
if (value instanceof String) {
String strVal = resolveEmbeddedValue((String) value);
BeanDefinition bd = (beanName != null && containsBean(beanName) ? getMergedBeanDefinition(beanName) : null);
value = evaluateBeanDefinitionString(strVal, bd);
}
TypeConverter converter = (typeConverter != null ? typeConverter : getTypeConverter());
return (descriptor.getField() != null ? converter.convertIfNecessary(value, type, descriptor.getField())
: converter.convertIfNecessary(value, type, descriptor.getMethodParameter()));
}
if (type.isArray()) {
Class<?> componentType = type.getComponentType();
DependencyDescriptor targetDesc = new DependencyDescriptor(descriptor);
targetDesc.increaseNestingLevel();
Map<String, Object> matchingBeans = findAutowireCandidates(beanName, componentType, targetDesc);
if (matchingBeans.isEmpty()) {
if (descriptor.isRequired()) {
raiseNoSuchBeanDefinitionException(componentType, "array of " + componentType.getName(), descriptor);
}
return null;
}
if (autowiredBeanNames != null) {
autowiredBeanNames.addAll(matchingBeans.keySet());
}
TypeConverter converter = (typeConverter != null ? typeConverter : getTypeConverter());
Object result = converter.convertIfNecessary(matchingBeans.values(), type);
if (getDependencyComparator() != null && result instanceof Object[]) {
Arrays.sort((Object[]) result, adaptDependencyComparator(matchingBeans));
}
return result;
} else if (Collection.class.isAssignableFrom(type) && type.isInterface()) {
Class<?> elementType = descriptor.getCollectionType();
if (elementType == null) {
if (descriptor.isRequired()) {
throw new FatalBeanException("No element type declared for collection [" + type.getName() + "]");
}
return null;
}
DependencyDescriptor targetDesc = new DependencyDescriptor(descriptor);
targetDesc.increaseNestingLevel();
Map<String, Object> matchingBeans = findAutowireCandidates(beanName, elementType, targetDesc);
if (matchingBeans.isEmpty()) {
if (descriptor.isRequired()) {
raiseNoSuchBeanDefinitionException(elementType, "collection of " + elementType.getName(), descriptor);
}
return null;
}
if (autowiredBeanNames != null) {
autowiredBeanNames.addAll(matchingBeans.keySet());
}
TypeConverter converter = (typeConverter != null ? typeConverter : getTypeConverter());
Object result = converter.convertIfNecessary(matchingBeans.values(), type);
if (getDependencyComparator() != null && result instanceof List) {
Collections.sort((List<?>) result, adaptDependencyComparator(matchingBeans));
}
return result;
} else if (Map.class.isAssignableFrom(type) && type.isInterface()) {
Class<?> keyType = descriptor.getMapKeyType();
if (keyType == null || !String.class.isAssignableFrom(keyType)) {
if (descriptor.isRequired()) {
throw new FatalBeanException("Key type [" + keyType + "] of map [" + type.getName()
+ "] must be assignable to [java.lang.String]");
}
return null;
}
Class<?> valueType = descriptor.getMapValueType();
if (valueType == null) {
if (descriptor.isRequired()) {
throw new FatalBeanException("No value type declared for map [" + type.getName() + "]");
}
return null;
}
DependencyDescriptor targetDesc = new DependencyDescriptor(descriptor);
targetDesc.increaseNestingLevel();
Map<String, Object> matchingBeans = findAutowireCandidates(beanName, valueType, targetDesc);
if (matchingBeans.isEmpty()) {
if (descriptor.isRequired()) {
raiseNoSuchBeanDefinitionException(valueType, "map with value type " + valueType.getName(), descriptor);
}
return null;
}
if (autowiredBeanNames != null) {
autowiredBeanNames.addAll(matchingBeans.keySet());
}
return matchingBeans;
} else {
Map<String, Object> matchingBeans = findAutowireCandidates(beanName, type, descriptor);
if (matchingBeans.isEmpty()) {
if (descriptor.isRequired()) {
raiseNoSuchBeanDefinitionException(type, "", descriptor);
}
return null;
}
if (matchingBeans.size() > 1) {
String primaryBeanName = determineAutowireCandidate(matchingBeans, descriptor);
if (primaryBeanName == null) {
throw new NoUniqueBeanDefinitionException(type, matchingBeans.keySet());
}
if (autowiredBeanNames != null) {
autowiredBeanNames.add(primaryBeanName);
}
return matchingBeans.get(primaryBeanName);
}
// We have exactly one match.
Map.Entry<String, Object> entry = matchingBeans.entrySet().iterator().next();
if (autowiredBeanNames != null) {
autowiredBeanNames.add(entry.getKey());
}
return entry.getValue();
}
}
private Comparator<Object> adaptDependencyComparator(Map<String, Object> matchingBeans) {
Comparator<Object> comparator = getDependencyComparator();
if (comparator instanceof OrderComparator) {
return ((OrderComparator) comparator).withSourceProvider(createFactoryAwareOrderSourceProvider(matchingBeans));
} else {
return comparator;
}
}
private FactoryAwareOrderSourceProvider createFactoryAwareOrderSourceProvider(Map<String, Object> beans) {
IdentityHashMap<Object, String> instancesToBeanNames = new IdentityHashMap<Object, String>();
for (Map.Entry<String, Object> entry : beans.entrySet()) {
instancesToBeanNames.put(entry.getValue(), entry.getKey());
}
return new FactoryAwareOrderSourceProvider(instancesToBeanNames);
}
/**
* Find bean instances that match the required type. Called during autowiring for the specified bean.
*
* @param beanName the name of the bean that is about to be wired
* @param requiredType the actual type of bean to look for (may be an array component type or collection element type)
* @param descriptor the descriptor of the dependency to resolve
* @return a Map of candidate names and candidate instances that match the required type (never {@code null})
* @throws BeansException in case of errors
* @see #autowireByType
* @see #autowireConstructor
*/
protected Map<String, Object> findAutowireCandidates(String beanName, Class<?> requiredType, DependencyDescriptor descriptor) {
String[] candidateNames = BeanFactoryUtils.beanNamesForTypeIncludingAncestors(this, requiredType, true, descriptor.isEager());
Map<String, Object> result = new LinkedHashMap<String, Object>(candidateNames.length);
for (Class<?> autowiringType : this.resolvableDependencies.keySet()) {
if (autowiringType.isAssignableFrom(requiredType)) {
Object autowiringValue = this.resolvableDependencies.get(autowiringType);
autowiringValue = AutowireUtils.resolveAutowiringValue(autowiringValue, requiredType);
if (requiredType.isInstance(autowiringValue)) {
result.put(ObjectUtils.identityToString(autowiringValue), autowiringValue);
break;
}
}
}
for (String candidateName : candidateNames) {
if (!isSelfReference(beanName, candidateName) && isAutowireCandidate(candidateName, descriptor)) {
result.put(candidateName, getBean(candidateName));
}
}
if (result.isEmpty()) {
DependencyDescriptor fallbackDescriptor = descriptor.forFallbackMatch();
for (String candidateName : candidateNames) {
if (!candidateName.equals(beanName) && isAutowireCandidate(candidateName, fallbackDescriptor)) {
result.put(candidateName, getBean(candidateName));
}
}
}
return result;
}
/**
* Determine the autowire candidate in the given set of beans.
* <p>
* Looks for {@code @Primary} and {@code @Priority} (in that order).
*
* @param candidateBeans a Map of candidate names and candidate instances that match the required type, as returned by
* {@link #findAutowireCandidates}
* @param descriptor the target dependency to match against
* @return the name of the autowire candidate, or {@code null} if none found
*/
protected String determineAutowireCandidate(Map<String, Object> candidateBeans, DependencyDescriptor descriptor) {
Class<?> requiredType = descriptor.getDependencyType();
String primaryCandidate = determinePrimaryCandidate(candidateBeans, requiredType);
if (primaryCandidate != null) {
return primaryCandidate;
}
String priorityCandidate = determineHighestPriorityCandidate(candidateBeans, requiredType);
if (priorityCandidate != null) {
return priorityCandidate;
}
// Fallback
for (Map.Entry<String, Object> entry : candidateBeans.entrySet()) {
String candidateBeanName = entry.getKey();
Object beanInstance = entry.getValue();
if (this.resolvableDependencies.values().contains(beanInstance)
|| matchesBeanName(candidateBeanName, descriptor.getDependencyName())) {
return candidateBeanName;
}
}
return null;
}
/**
* Determine the primary candidate in the given set of beans.
*
* @param candidateBeans a Map of candidate names and candidate instances that match the required type
* @param requiredType the target dependency type to match against
* @return the name of the primary candidate, or {@code null} if none found
* @see #isPrimary(String, Object)
*/
protected String determinePrimaryCandidate(Map<String, Object> candidateBeans, Class<?> requiredType) {
String primaryBeanName = null;
for (Map.Entry<String, Object> entry : candidateBeans.entrySet()) {
String candidateBeanName = entry.getKey();
Object beanInstance = entry.getValue();
if (isPrimary(candidateBeanName, beanInstance)) {
if (primaryBeanName != null) {
boolean candidateLocal = containsBeanDefinition(candidateBeanName);
boolean primaryLocal = containsBeanDefinition(primaryBeanName);
if (candidateLocal && primaryLocal) {
throw new NoUniqueBeanDefinitionException(requiredType, candidateBeans
.size(), "more than one 'primary' bean found among candidates: " + candidateBeans.keySet());
} else if (candidateLocal) {
primaryBeanName = candidateBeanName;
}
} else {
primaryBeanName = candidateBeanName;
}
}
}
return primaryBeanName;
}
/**
* Determine the candidate with the highest priority in the given set of beans. As defined by the
* {@link org.springframework.core.Ordered} interface, the lowest value has the highest priority.
*
* @param candidateBeans a Map of candidate names and candidate instances that match the required type
* @param requiredType the target dependency type to match against
* @return the name of the candidate with the highest priority, or {@code null} if none found
* @see #getPriority(Object)
*/
protected String determineHighestPriorityCandidate(Map<String, Object> candidateBeans, Class<?> requiredType) {
String highestPriorityBeanName = null;
Integer highestPriority = null;
for (Map.Entry<String, Object> entry : candidateBeans.entrySet()) {
String candidateBeanName = entry.getKey();
Object beanInstance = entry.getValue();
Integer candidatePriority = getPriority(beanInstance);
if (candidatePriority != null) {
if (highestPriorityBeanName != null) {
if (candidatePriority.equals(highestPriority)) {
throw new NoUniqueBeanDefinitionException(requiredType, candidateBeans.size(),
"Multiple beans found with the same priority ('" + highestPriority + "') "
+ "among candidates: " + candidateBeans.keySet());
} else if (candidatePriority < highestPriority) {
highestPriorityBeanName = candidateBeanName;
highestPriority = candidatePriority;
}
} else {
highestPriorityBeanName = candidateBeanName;
highestPriority = candidatePriority;
}
}
}
return highestPriorityBeanName;
}
/**
* Return whether the bean definition for the given bean name has been marked as a primary bean.
*
* @param beanName the name of the bean
* @param beanInstance the corresponding bean instance (can be null)
* @return whether the given bean qualifies as primary
*/
protected boolean isPrimary(String beanName, Object beanInstance) {
if (containsBeanDefinition(beanName)) {
return getMergedLocalBeanDefinition(beanName).isPrimary();
}
BeanFactory parentFactory = getParentBeanFactory();
return (parentFactory instanceof DefaultListableBeanFactory
&& ((DefaultListableBeanFactory) parentFactory).isPrimary(beanName, beanInstance));
}
/**
* Return the priority assigned for the given bean instance by the {@code javax.annotation.Priority} annotation.
* <p>
* The default implementation delegates to the specified {@link #setDependencyComparator dependency comparator}, checking its
* {@link OrderComparator#getPriority method} if it is an extension of Spring's common {@link OrderComparator} - typically, an
* {@link org.springframework.core.annotation.AnnotationAwareOrderComparator}. If no such comparator is present, this
* implementation returns {@code null}.
*
* @param beanInstance the bean instance to check (can be {@code null})
* @return the priority assigned to that bean or {@code null} if none is set
*/
protected Integer getPriority(Object beanInstance) {
Comparator<Object> comparator = getDependencyComparator();
if (comparator instanceof OrderComparator) {
return ((OrderComparator) comparator).getPriority(beanInstance);
}
return null;
}
/**
* Determine whether the given candidate name matches the bean name or the aliases stored in this bean definition.
*/
protected boolean matchesBeanName(String beanName, String candidateName) {
return (candidateName != null
&& (candidateName.equals(beanName) || ObjectUtils.containsElement(getAliases(beanName), candidateName)));
}
/**
* Determine whether the given beanName/candidateName pair indicates a self reference, i.e. whether the candidate points back to
* the original bean or to a factory method on the original bean.
*/
private boolean isSelfReference(String beanName, String candidateName) {
return (beanName != null && candidateName != null && (beanName.equals(candidateName) || (containsBeanDefinition(candidateName)
&& beanName.equals(getMergedLocalBeanDefinition(candidateName).getFactoryBeanName()))));
}
/**
* Raise a NoSuchBeanDefinitionException for an unresolvable dependency.
*/
private void raiseNoSuchBeanDefinitionException(Class<?> type, String dependencyDescription, DependencyDescriptor descriptor)
throws NoSuchBeanDefinitionException {
throw new NoSuchBeanDefinitionException(type, dependencyDescription,
"expected at least 1 bean which qualifies as autowire candidate for this dependency. "
+ "Dependency annotations: "
+ ObjectUtils.nullSafeToString(descriptor.getAnnotations()));
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder(ObjectUtils.identityToString(this));
sb.append(": defining beans [");
sb.append(StringUtils.collectionToCommaDelimitedString(this.beanDefinitionNames));
sb.append("]; ");
BeanFactory parent = getParentBeanFactory();
if (parent == null) {
sb.append("root of factory hierarchy");
} else {
sb.append("parent: ").append(ObjectUtils.identityToString(parent));
}
return sb.toString();
}
// ---------------------------------------------------------------------
// Serialization support
// ---------------------------------------------------------------------
private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
throw new NotSerializableException("DefaultListableBeanFactory itself is not deserializable - "
+ "just a SerializedBeanFactoryReference is");
}
protected Object writeReplace() throws ObjectStreamException {
if (this.serializationId != null) {
return new SerializedBeanFactoryReference(this.serializationId);
} else {
throw new NotSerializableException("DefaultListableBeanFactory has no serialization id");
}
}
/**
* Minimal id reference to the factory. Resolved to the actual factory instance on deserialization.
*/
private static class SerializedBeanFactoryReference implements Serializable {
private final String id;
public SerializedBeanFactoryReference(String id) {
this.id = id;
}
private Object readResolve() {
Reference<?> ref = serializableFactories.get(this.id);
if (ref == null) {
throw new IllegalStateException("Cannot deserialize BeanFactory with id " + this.id
+ ": no factory registered for this id");
}
Object result = ref.get();
if (result == null) {
throw new IllegalStateException("Cannot deserialize BeanFactory with id " + this.id
+ ": factory has been garbage-collected");
}
return result;
}
}
/**
* Separate inner class for avoiding a hard dependency on the {@code javax.inject} API.
*/
@UsesJava8
private class OptionalDependencyFactory {
public Object createOptionalDependency(DependencyDescriptor descriptor, String beanName) {
DependencyDescriptor descriptorToUse = new DependencyDescriptor(descriptor) {
@Override
public boolean isRequired() {
return false;
}
};
descriptorToUse.increaseNestingLevel();
return Optional.fromNullable(doResolveDependency(descriptorToUse, beanName, null, null));
}
}
/**
* Serializable ObjectFactory for lazy resolution of a dependency.
*/
private class DependencyObjectFactory implements ObjectFactory<Object>, Serializable {
private final DependencyDescriptor descriptor;
private final boolean optional;
private final String beanName;
public DependencyObjectFactory(DependencyDescriptor descriptor, String beanName) {
this.descriptor = new DependencyDescriptor(descriptor);
this.descriptor.increaseNestingLevel();
this.optional = this.descriptor.getDependencyType().equals(javaUtilOptionalClass);
this.beanName = beanName;
}
@Override
public Object getObject() throws BeansException {
if (this.optional) {
return new OptionalDependencyFactory().createOptionalDependency(this.descriptor, this.beanName);
} else {
return doResolveDependency(this.descriptor, this.beanName, null, null);
}
}
}
/**
* Serializable ObjectFactory for lazy resolution of a dependency.
*/
private class DependencyProvider extends DependencyObjectFactory implements Provider<Object> {
public DependencyProvider(DependencyDescriptor descriptor, String beanName) {
super(descriptor, beanName);
}
@Override
public Object get() throws BeansException {
return getObject();
}
}
/**
* Separate inner class for avoiding a hard dependency on the {@code javax.inject} API.
*/
private class DependencyProviderFactory {
public Object createDependencyProvider(DependencyDescriptor descriptor, String beanName) {
return new DependencyProvider(descriptor, beanName);
}
}
/**
* An {@link org.springframework.core.OrderComparator.OrderSourceProvider} implementation that is aware of the bean metadata of
* the instances to sort.
* <p>
* Lookup for the method factory of an instance to sort, if any, and let the comparator retrieve the
* {@link org.springframework.core.annotation.Order} value defined on it. This essentially allows for the following construct:
*/
private class FactoryAwareOrderSourceProvider implements OrderComparator.OrderSourceProvider {
private final Map<Object, String> instancesToBeanNames;
public FactoryAwareOrderSourceProvider(Map<Object, String> instancesToBeanNames) {
this.instancesToBeanNames = instancesToBeanNames;
}
@Override
public Object getOrderSource(Object obj) {
return getFactoryMethod(this.instancesToBeanNames.get(obj));
}
private Method getFactoryMethod(String beanName) {
if (beanName != null && containsBeanDefinition(beanName)) {
BeanDefinition bd = getMergedBeanDefinition(beanName);
if (bd instanceof RootBeanDefinition) {
return ((RootBeanDefinition) bd).getResolvedFactoryMethod();
}
}
return null;
}
}
}