public class AutowiredAnnotationBeanPostProcessor extends InstantiationAwareBeanPostProcessorAdapter implements MergedBeanDefinitionPostProcessor, org.springframework.core.PriorityOrdered, BeanFactoryAware
BeanPostProcessor implementation
that autowires annotated fields, setter methods and arbitrary config methods.
Such members to be injected are detected through a Java 5 annotation: by default,
Spring's @Autowired and @Value annotations.
Also supports JSR-330's @Inject annotation,
if available, as a direct alternative to Spring's own @Autowired.
Only one constructor (at max) of any given bean class may carry this
annotation with the 'required' parameter set to true,
indicating the constructor to autowire when used as a Spring bean.
If multiple non-required constructors carry the annotation, they
will be considered as candidates for autowiring. The constructor with
the greatest number of dependencies that can be satisfied by matching
beans in the Spring container will be chosen. If none of the candidates
can be satisfied, then a default constructor (if present) will be used.
An annotated constructor does not have to be public.
Fields are injected right after construction of a bean, before any config methods are invoked. Such a config field does not have to be public.
Config methods may have an arbitrary name and any number of arguments; each of those arguments will be autowired with a matching bean in the Spring container. Bean property setter methods are effectively just a special case of such a general config method. Config methods do not have to be public.
Note: A default AutowiredAnnotationBeanPostProcessor will be registered by the "context:annotation-config" and "context:component-scan" XML tags. Remove or turn off the default annotation configuration there if you intend to specify a custom AutowiredAnnotationBeanPostProcessor bean definition.
NOTE: Annotation injection will be performed before XML injection; thus the latter configuration will override the former for properties wired through both approaches.
setAutowiredAnnotationType(java.lang.Class<? extends java.lang.annotation.Annotation>),
Autowired,
Value| Constructor and Description |
|---|
AutowiredAnnotationBeanPostProcessor()
Create a new AutowiredAnnotationBeanPostProcessor
for Spring's standard
Autowired annotation. |
| Modifier and Type | Method and Description |
|---|---|
Constructor<?>[] |
determineCandidateConstructors(Class<?> beanClass,
String beanName)
Determine the candidate constructors to use for the given bean.
|
protected boolean |
determineRequiredStatus(Annotation annotation)
Determine if the annotated field or method requires its dependency.
|
protected <T> Map<String,T> |
findAutowireCandidates(Class<T> type)
Obtain all beans of the given type as autowire candidates.
|
int |
getOrder() |
void |
postProcessMergedBeanDefinition(RootBeanDefinition beanDefinition,
Class<?> beanType,
String beanName)
Post-process the given merged bean definition for the specified bean.
|
PropertyValues |
postProcessPropertyValues(PropertyValues pvs,
PropertyDescriptor[] pds,
Object bean,
String beanName)
Post-process the given property values before the factory applies them
to the given bean.
|
void |
processInjection(Object bean)
'Native' processing method for direct calls with an arbitrary target instance,
resolving all of its fields and methods which are annotated with
@Autowired. |
void |
setAutowiredAnnotationType(Class<? extends Annotation> autowiredAnnotationType)
Set the 'autowired' annotation type, to be used on constructors, fields,
setter methods and arbitrary config methods.
|
void |
setAutowiredAnnotationTypes(Set<Class<? extends Annotation>> autowiredAnnotationTypes)
Set the 'autowired' annotation types, to be used on constructors, fields,
setter methods and arbitrary config methods.
|
void |
setBeanFactory(BeanFactory beanFactory)
Callback that supplies the owning factory to a bean instance.
|
void |
setOrder(int order) |
void |
setRequiredParameterName(String requiredParameterName)
Set the name of a parameter of the annotation that specifies
whether it is required.
|
void |
setRequiredParameterValue(boolean requiredParameterValue)
Set the boolean value that marks a dependency as required
|
getEarlyBeanReference, postProcessAfterInitialization, postProcessAfterInstantiation, postProcessBeforeInitialization, postProcessBeforeInstantiation, predictBeanTypeclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitpostProcessAfterInitialization, postProcessBeforeInitializationprotected final Log logger
public AutowiredAnnotationBeanPostProcessor()
public void setAutowiredAnnotationType(Class<? extends Annotation> autowiredAnnotationType)
The default autowired annotation type is the Spring-provided
Autowired annotation, as well as Value.
This setter property exists so that developers can provide their own (non-Spring-specific) annotation type to indicate that a member is supposed to be autowired.
public void setAutowiredAnnotationTypes(Set<Class<? extends Annotation>> autowiredAnnotationTypes)
The default autowired annotation type is the Spring-provided
Autowired annotation, as well as Value.
This setter property exists so that developers can provide their own (non-Spring-specific) annotation types to indicate that a member is supposed to be autowired.
public void setRequiredParameterName(String requiredParameterName)
setRequiredParameterValue(boolean)public void setRequiredParameterValue(boolean requiredParameterValue)
For example if using 'required=true' (the default),
this value should be true; but if using
'optional=false', this value should be false.
setRequiredParameterName(String)public void setOrder(int order)
public int getOrder()
getOrder in interface org.springframework.core.Orderedpublic void setBeanFactory(BeanFactory beanFactory) throws BeansException
BeanFactoryAwareInvoked after the population of normal bean properties
but before an initialization callback such as
InitializingBean.afterPropertiesSet() or a custom init-method.
setBeanFactory in interface BeanFactoryAwarebeanFactory - owning BeanFactory (never null).
The bean can immediately call methods on the factory.BeansException - in case of initialization errorsBeanInitializationExceptionpublic void postProcessMergedBeanDefinition(RootBeanDefinition beanDefinition, Class<?> beanType, String beanName)
MergedBeanDefinitionPostProcessorpostProcessMergedBeanDefinition in interface MergedBeanDefinitionPostProcessorbeanDefinition - the merged bean definition for the beanbeanType - the actual type of the managed bean instancebeanName - the name of the beanpublic Constructor<?>[] determineCandidateConstructors(Class<?> beanClass, String beanName) throws BeansException
SmartInstantiationAwareBeanPostProcessordetermineCandidateConstructors in interface SmartInstantiationAwareBeanPostProcessordetermineCandidateConstructors in class InstantiationAwareBeanPostProcessorAdapterbeanClass - the raw class of the bean (never null)beanName - the name of the beannull if none specifiedBeansException - in case of errorspublic PropertyValues postProcessPropertyValues(PropertyValues pvs, PropertyDescriptor[] pds, Object bean, String beanName) throws BeansException
InstantiationAwareBeanPostProcessorAlso allows for replacing the property values to apply, typically through creating a new MutablePropertyValues instance based on the original PropertyValues, adding or removing specific values.
postProcessPropertyValues in interface InstantiationAwareBeanPostProcessorpostProcessPropertyValues in class InstantiationAwareBeanPostProcessorAdapterpvs - the property values that the factory is about to apply (never null)pds - the relevant property descriptors for the target bean (with ignored
dependency types - which the factory handles specifically - already filtered out)bean - the bean instance created, but whose properties have not yet been setbeanName - the name of the beannull
to skip property populationBeansException - in case of errorsMutablePropertyValuespublic void processInjection(Object bean) throws BeansException
@Autowired.bean - the target instance to processBeansException - if autowiring failedprotected <T> Map<String,T> findAutowireCandidates(Class<T> type) throws BeansException
type - the type of the beanBeansException - if bean retrieval failedprotected boolean determineRequiredStatus(Annotation annotation)
A 'required' dependency means that autowiring should fail when no beans are found. Otherwise, the autowiring process will simply bypass the field or method when no beans are found.
annotation - the Autowired annotation