com.sun.hk2.component
Class InjectionResolver<U extends java.lang.annotation.Annotation>

java.lang.Object
  com.sun.hk2.component.InjectionResolver<U>

public abstract class InjectionResolver<U extends java.lang.annotation.Annotation>
extends java.lang.Object

Implementation of this abstract class are handling injection resolution for a particular injection annotation Inject

Author:

Jerome Dochez

Field Summary

java.lang.Class<U>

type

Constructor Summary

InjectionResolver(java.lang.Class<U> type)
Construct a resolver with a particular injection type

Method Summary

abstract java.lang.Object	getValue(java.lang.Object component, java.lang.reflect.AnnotatedElement annotated, java.lang.Class type) Returns the value to inject in the field or method of component annotated with the annotated annotation.
boolean	isOptional(U annotation) Returns true if the resolution of this injection identified by the passed annotation instance is optional

Methods inherited from class java.lang.Object

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

Field Detail

type

public final java.lang.Class<U extends java.lang.annotation.Annotation> type

Constructor Detail

InjectionResolver

public InjectionResolver(java.lang.Class<U> type)

Construct a resolver with a particular injection type

Parameters:

type - the injection annotation type

Method Detail

isOptional

public boolean isOptional(U annotation)

Returns true if the resolution of this injection identified by the passed annotation instance is optional

Parameters:

annotation - the injection metadata

Returns:

true if the getValue() can return null without generating a faulty injection operation

getValue

public abstract java.lang.Object getValue(java.lang.Object component,
                                          java.lang.reflect.AnnotatedElement annotated,
                                          java.lang.Class type)
                                   throws ComponentException

Returns the value to inject in the field or method of component annotated with the annotated annotation.

Parameters:

component - injection target

annotated - field of method to inject

type - type of the expected return

Returns:

the injectable resource

Throws:

ComponentException - if the resource cannot be located.