org.springframework.beans.factory

接口 ObjectProvider<T>

所有超级接口:

ObjectFactory<T>

public interface ObjectProvider<T>
extends ObjectFactory<T>

A variant of ObjectFactory designed specifically for injection points, allowing for programmatic optionality and lenient not-unique handling.

从以下版本开始:

4.3

作者:

Juergen Hoeller

方法概要

限定符和类型	方法和说明
T	getIfAvailable() Return an instance (possibly shared or independent) of the object managed by this factory.
default T	getIfAvailable(Supplier<T> defaultSupplier) Return an instance (possibly shared or independent) of the object managed by this factory.
T	getIfUnique() Return an instance (possibly shared or independent) of the object managed by this factory.
default T	getIfUnique(Supplier<T> defaultSupplier) Return an instance (possibly shared or independent) of the object managed by this factory.
T	getObject(Object... args) Return an instance (possibly shared or independent) of the object managed by this factory.
default void	ifAvailable(Consumer<T> dependencyConsumer) Consume an instance (possibly shared or independent) of the object managed by this factory, if available.
default void	ifUnique(Consumer<T> dependencyConsumer) Consume an instance (possibly shared or independent) of the object managed by this factory, if unique.

从接口继承的方法 org.springframework.beans.factory.ObjectFactory

getObject

方法详细资料

getObject

T getObject(Object... args)
     throws BeansException

Return an instance (possibly shared or independent) of the object managed by this factory.

Allows for specifying explicit construction arguments, along the lines of BeanFactory.getBean(String, Object...).

参数:

args - arguments to use when creating a corresponding instance

返回:

an instance of the bean

抛出:

BeansException - in case of creation errors

另请参阅:

ObjectFactory.getObject()

getIfAvailable

@Nullable
T getIfAvailable()
                     throws BeansException

Return an instance (possibly shared or independent) of the object managed by this factory.

返回:

an instance of the bean, or null if not available

抛出:

BeansException - in case of creation errors

另请参阅:

ObjectFactory.getObject()

getIfAvailable

default T getIfAvailable(Supplier<T> defaultSupplier)
                  throws BeansException

Return an instance (possibly shared or independent) of the object managed by this factory.

参数:

defaultSupplier - a callback for supplying a default object if none is present in the factory

返回:

an instance of the bean, or the supplied default object if no such bean is available

抛出:

BeansException - in case of creation errors

从以下版本开始:

5.0

另请参阅:

getIfAvailable()

ifAvailable

default void ifAvailable(Consumer<T> dependencyConsumer)
                  throws BeansException

Consume an instance (possibly shared or independent) of the object managed by this factory, if available.

参数:

dependencyConsumer - a callback for processing the target object if available (not called otherwise)

抛出:

BeansException - in case of creation errors

从以下版本开始:

5.0

另请参阅:

getIfAvailable()

getIfUnique

@Nullable
T getIfUnique()
                  throws BeansException

Return an instance (possibly shared or independent) of the object managed by this factory.

返回:

an instance of the bean, or null if not available or not unique (i.e. multiple candidates found with none marked as primary)

抛出:

BeansException - in case of creation errors

另请参阅:

ObjectFactory.getObject()

getIfUnique

default T getIfUnique(Supplier<T> defaultSupplier)
               throws BeansException

Return an instance (possibly shared or independent) of the object managed by this factory.

参数:

defaultSupplier - a callback for supplying a default object if no unique candidate is present in the factory

返回:

an instance of the bean, or the supplied default object if no such bean is available or if it is not unique in the factory (i.e. multiple candidates found with none marked as primary)

抛出:

BeansException - in case of creation errors

从以下版本开始:

5.0

另请参阅:

getIfUnique()

ifUnique

default void ifUnique(Consumer<T> dependencyConsumer)
               throws BeansException

Consume an instance (possibly shared or independent) of the object managed by this factory, if unique.

参数:

dependencyConsumer - a callback for processing the target object if unique (not called otherwise)

抛出:

BeansException - in case of creation errors

从以下版本开始:

5.0

另请参阅:

getIfAvailable()