Package org.int4.dirk.library

Class ProviderInjectionTargetExtension<P,E>

java.lang.Object

org.int4.dirk.library.ProviderInjectionTargetExtension<P,E>

Type Parameters:

P - the type of the provider

E - the type the provider provides

All Implemented Interfaces:

InjectionTargetExtension<P,E>

public class ProviderInjectionTargetExtension<P,E>
extends java.lang.Object
implements InjectionTargetExtension<P,E>

Configurable provider InjectionTargetExtension which allows selecting the type of provider it should handle.

Constructor Summary

Constructors

Constructor	Description
ProviderInjectionTargetExtension(java.lang.Class<P> providerClass, java.util.function.Function<java.util.function.Supplier<E>,P> providerFactory)	Constructs a new instance.

Method Summary

Modifier and Type	Method	Description
java.lang.reflect.Type	getElementType(java.lang.reflect.Type type)	Returns the element type of the given type by unwrapping the given type.
P	getInstance(InstantiationContext<E> context)	Creates an instance of type T using the given InstantiationContext.
java.lang.Class<?>	getTargetClass()	Returns the target class extended by this extension.
java.util.Set<TypeTrait>	getTypeTraits()	Returns the TypeTraits of this extension.

Methods inherited from class java.lang.Object

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

Constructor Detail

ProviderInjectionTargetExtension

public ProviderInjectionTargetExtension(java.lang.Class<P> providerClass,
                                        java.util.function.Function<java.util.function.Supplier<E>,P> providerFactory)

Constructs a new instance.

Parameters:

providerClass - a Class representing the provider type, cannot be null

providerFactory - a function to create the provider instance given a supplier, cannot be null

Method Detail

getTargetClass

public java.lang.Class<?> getTargetClass()

Description copied from interface: InjectionTargetExtension

Returns the target class extended by this extension.

Specified by:

getTargetClass in interface InjectionTargetExtension<P,E>

Returns:

a Class, never null

getElementType

public java.lang.reflect.Type getElementType(java.lang.reflect.Type type)

Description copied from interface: InjectionTargetExtension

Returns the element type of the given type by unwrapping the given type. Returning null or the same type is not allowed.

Specified by:

getElementType in interface InjectionTargetExtension<P,E>

Parameters:

type - a Type to unwrap, cannot be null

Returns:

the element type of the given type by unwrapping the given type, never null

getTypeTraits

public java.util.Set<TypeTrait> getTypeTraits()

Description copied from interface: InjectionTargetExtension

Returns the TypeTraits of this extension.

Specified by:

getTypeTraits in interface InjectionTargetExtension<P,E>

Returns:

a set of TypeTrait, never null or contains null, but can be empty

getInstance

public P getInstance(InstantiationContext<E> context)

Description copied from interface: InjectionTargetExtension

Creates an instance of type T using the given InstantiationContext. Returning null is allowed to indicate the absence of a value. Depending on the destination where the value is used this can mean null is injected (methods and constructors), that the value is not injected (fields) or that an UnsatisfiedResolutionException is thrown (direct instance resolver call).

Specified by:

getInstance in interface InjectionTargetExtension<P,E>

Parameters:

context - an InstantiationContext, cannot be null

Returns:

an instance of type T, can be null