Package org.springframework.beans.factory.annotation

Class InjectionMetadata

java.lang.Object

org.springframework.beans.factory.annotation.InjectionMetadata

public class InjectionMetadata
extends Object

Internal class for managing injection metadata.

Not intended for direct use in applications.

Used by AutowiredAnnotationBeanPostProcessor, CommonAnnotationBeanPostProcessor, and PersistenceAnnotationBeanPostProcessor.

Since:

2.5

Author:

Juergen Hoeller

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	InjectionMetadata.InjectedElement	A single injected element.

Field Summary

Fields

Modifier and Type	Field	Description
static final InjectionMetadata	EMPTY	An empty InjectionMetadata instance with no-op callbacks.

Constructor Summary

Constructors

Constructor	Description
InjectionMetadata(Class<?> targetClass, Collection<InjectionMetadata.InjectedElement> elements)	Create a new InjectionMetadata instance.

Method Summary

Modifier and Type	Method	Description
void	checkConfigMembers(RootBeanDefinition beanDefinition)
void	clear(PropertyValues pvs)	Clear property skipping for the contained elements.
static InjectionMetadata	forElements(Collection<InjectionMetadata.InjectedElement> elements, Class<?> clazz)	Return an InjectionMetadata instance, possibly for empty elements.
Collection<InjectionMetadata.InjectedElement>	getInjectedElements()	Return the elements to inject.
Collection<InjectionMetadata.InjectedElement>	getInjectedElements(PropertyValues pvs)	Return the elements to inject based on the specified PropertyValues.
void	inject(Object target, String beanName, PropertyValues pvs)
protected boolean	needsRefresh(Class<?> clazz)	Determine whether this metadata instance needs to be refreshed.
static boolean	needsRefresh(InjectionMetadata metadata, Class<?> clazz)	Check whether the given injection metadata needs to be refreshed.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

EMPTY

public static final InjectionMetadata EMPTY

An empty InjectionMetadata instance with no-op callbacks.

Since:

5.2

Constructor Details

InjectionMetadata

public InjectionMetadata(Class<?> targetClass,
 Collection<InjectionMetadata.InjectedElement> elements)

Create a new InjectionMetadata instance.

Preferably use forElements(java.util.Collection<org.springframework.beans.factory.annotation.InjectionMetadata.InjectedElement>, java.lang.Class<?>) for reusing the EMPTY instance in case of no elements.

Parameters:

targetClass - the target class

elements - the associated elements to inject

See Also:

• forElements(java.util.Collection<org.springframework.beans.factory.annotation.InjectionMetadata.InjectedElement>, java.lang.Class<?>)

Method Details

getInjectedElements

public Collection<InjectionMetadata.InjectedElement> getInjectedElements()

Return the elements to inject.

Returns:

the elements to inject

getInjectedElements

public Collection<InjectionMetadata.InjectedElement> getInjectedElements(@Nullable
 PropertyValues pvs)

Return the elements to inject based on the specified PropertyValues. If a property is already defined for an InjectionMetadata.InjectedElement, it is excluded.

Parameters:

pvs - the property values to consider

Returns:

the elements to inject

Since:

6.0.10

needsRefresh

protected boolean needsRefresh(Class<?> clazz)

Determine whether this metadata instance needs to be refreshed.

Parameters:

clazz - the current target class

Returns:

true indicating a refresh, false otherwise

Since:

5.2.4

checkConfigMembers

public void checkConfigMembers(RootBeanDefinition beanDefinition)

inject

public void inject(Object target,
 @Nullable
 String beanName,
 @Nullable
 PropertyValues pvs)
            throws Throwable

Throws:

Throwable

clear

public void clear(@Nullable
 PropertyValues pvs)

Clear property skipping for the contained elements.

Since:

3.2.13

forElements

public static InjectionMetadata forElements(Collection<InjectionMetadata.InjectedElement> elements,
 Class<?> clazz)

Return an InjectionMetadata instance, possibly for empty elements.

Parameters:

elements - the elements to inject (possibly empty)

clazz - the target class

Returns:

a new InjectionMetadata(Class, Collection) instance

Since:

5.2

needsRefresh

@Contract("null, _ -> true")
public static boolean needsRefresh(@Nullable
 InjectionMetadata metadata,
 Class<?> clazz)

Check whether the given injection metadata needs to be refreshed.

Parameters:

metadata - the existing metadata instance

clazz - the current target class

Returns:

true indicating a refresh, false otherwise

See Also:

• needsRefresh(Class)