org.jvnet.hk2.config

Class InjectionResolver<U extends java.lang.annotation.Annotation>

java.lang.Object

org.jvnet.hk2.config.InjectionResolver<U>

Type Parameters:

U - U is the annotation used to identify the injection targets.

All Implemented Interfaces:

InjectionResolverQuery

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

Implementation of this abstract class are handling injection resolution for a particular injection annotation Inject Injection targets are identified by the generic parameter and the constructor of this class. Potential injection targets are fields and methods of the injected type.

Author:

Jerome Dochez

Field Summary

Fields

Modifier and Type	Field and Description
java.lang.Class<U>	type

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.reflect.Method	getSetterMethod(java.lang.reflect.Method annotated, U annotation) Returns the setter method responsible for setting the resource identified by the passed annotation on the passed annotated method.
boolean	isOptional(java.lang.reflect.AnnotatedElement annotated, 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

Methods inherited from interface org.jvnet.hk2.config.InjectionResolverQuery

getValue

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

getSetterMethod

public java.lang.reflect.Method getSetterMethod(java.lang.reflect.Method annotated,
                                       U annotation)

Returns the setter method responsible for setting the resource identified by the passed annotation on the passed annotated method. This is useful when the annotation is specified on the getter for instance (due to external specification requirements for instance) while the setter should be used if values must be set using this injection resolver. By default, the setter method is the annotated method.

Parameters:

annotated - is the annotated Method

annotation - the annotation on the method

Returns:

the setter method to use for injecting the annotation identified resource

isOptional

public boolean isOptional(java.lang.reflect.AnnotatedElement annotated,
                 U annotation)

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

Parameters:

annotated - is the annotated java element Method or Field

annotation - the injection metadata

Returns:

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