com.truward.di

Interface InjectionContext

All Known Implementing Classes:

DefaultInjectionContext

public interface InjectionContext

Provides very simple dependency injection support by relying on the Resource annotation. All the beans assumed to be singletons in the current context. The role of the context is to initialize the given object's fields annotated with the Resource annotation, The methods annotated with the PostConstruct will be invoked when all these fields will be initialized. The implementations of this class are not thread safe unless otherwise specified.

Author:

Alexander Shabanov

See Also:

Resource, PostConstruct

Method Summary

Methods

Modifier and Type	Method and Description
void	freeze() Freezes current context, so there will be no possibility to modify this context.
<T> T	getBean(Class<T> beanClass) Gets bean associated with the class given.
<T> List<T>	getBeans(Class<T> beanClass) Returns all the beans that implement the given class.
boolean	isFrozen()
<T> void	registerBean(Class<T> beanClass) Puts bean instance associated with the given class.
<T> void	registerBean(T bean) Puts bean instance to the context.

Method Detail

registerBean

<T> void registerBean(@Nonnull
                    T bean)

Puts bean instance to the context. The bean should be only one.

Type Parameters:

T - Bean's class.

Parameters:

bean - Bean instance.

registerBean

<T> void registerBean(@Nonnull
                    Class<T> beanClass)

Puts bean instance associated with the given class. Throws InjectionException if the given bean class clashes with certain existing definition.

Type Parameters:

T - Bean class type.

Parameters:

beanClass - Non-interface bean class.

getBean

@Nonnull
<T> T getBean(@Nonnull
                    Class<T> beanClass)

Gets bean associated with the class given. Returns current Context instance when beanClass equals to Context class itself. Throws InjectionException in case of no bean associated with the given class. Throws InjectionException if multiple beans can be returned by this method.

Type Parameters:

T - Interface type.

Parameters:

beanClass - Interface class, that is expected to be associated with the bean.

Returns:

Non-null bean instance.

getBeans

@Nonnull
<T> List<T> getBeans(@Nonnull
                           Class<T> beanClass)

Returns all the beans that implement the given class.

Type Parameters:

T - Interface type.

Parameters:

beanClass - Interface class, that is expected to be associated with the bean.

Returns:

Non-null list

freeze

void freeze()

Freezes current context, so there will be no possibility to modify this context.

See Also:

isFrozen()

isFrozen

boolean isFrozen()

Returns:

Boolean flag, that indicates, whether the context is frozen or not.

See Also:

freeze()