[cdi-dev] [JBoss JIRA] (CDI-551) Easier access to InjectionPoint qualifiers.

[Chris Rankin (JIRA)]

     [ https://issues.jboss.org/browse/CDI-551?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chris Rankin updated CDI-551:
-----------------------------
    Description: 
I would like to extend {{javax.enterprise.inject.spi.InjectionPoint}} for easier analysis of both static and dynamic qualifiers.

I have previously used {{InjectionPoint.getAnnotated()}}, but have now realised that this is not enough because it cannot include {{AnnotationLiteral}} qualifiers added via {{Instance.select(...)}}. The only reliable way to analyse _all_ of the qualifiers is currently via {{InjectionPoint.getQualifiers()}}, which unfortunately returns {{Set<Annotated>}}.

A {{Set<Annotated>>}} is not immediately useful to me; about the only thing that I can do with it is iterate over it every time. So I must convert it into something more like this first:

{code:language=java}
@SuppressWarnings("unchecked")
public class QualifierMap extends HashMap<Class<? extends Annotation>, Annotation> {
    private static final long serialVersionUID = 1L;

    public QualifierMap(Iterable<? extends Annotation> qualifiers) {
        for (Annotation qualifier : qualifiers) {
            put(qualifier.annotationType(), qualifier);
        }
    }

    public <T extends Annotation> T get(Class<T> key) {
        return (T) super.get(key);
    }

}
{code}

However, it would be much _more_ convenient if {{InjectionPoint}} could export this functionality automatically instead:

{code:language=java}
public interface InjectionPoint {

    ...

    boolean isQualifierPresent(Class<? extends Annotation> annotationType);  
 
    <T extends Annotation> T getQualifier(Class<T> annotationType);

    ....

}
{code}

  was:
I would like to extend {{javax.enterprise.inject.spi.InjectionPoint}} for easier analysis of both static and dynamic qualifiers.

I have previously used {{InjectionPoint.getAnnotated()}}, but have now realised that is not enough because it cannot include {{AnnotationLiteral}} qualifiers added via {{Instance.select(...)}}. The only reliable way to analyse _all_ of the qualifiers is currently via {{InjectionPoint.getQualifiers()}}, which unfortunately returns {{Set<Annotated>}}.

A {{Set<Annotated>>}} is not immediately useful to me; about the only thing that I can do with it is iterate over it every time. So I must convert it into something more like this first:

{code:language=java}
@SuppressWarnings("unchecked")
public class QualifierMap extends HashMap<Class<? extends Annotation>, Annotation> {
    private static final long serialVersionUID = 1L;

    public QualifierMap(Iterable<? extends Annotation> qualifiers) {
        for (Annotation qualifier : qualifiers) {
            put(qualifier.annotationType(), qualifier);
        }
    }

    public <T extends Annotation> T get(Class<T> key) {
        return (T) super.get(key);
    }

}
{code}

However, it would be much _more_ convenient if {{InjectionPoint}} could export this functionality automatically instead:

{code:language=java}
public interface InjectionPoint {

    ...

    boolean isQualifierPresent(Class<? extends Annotation> annotationType);  
 
    <T extends Annotation> T getQualifier(Class<T> annotationType);

    ....

}
{code}



> Easier access to InjectionPoint qualifiers.
> -------------------------------------------
>
>                 Key: CDI-551
>                 URL: https://issues.jboss.org/browse/CDI-551
>             Project: CDI Specification Issues
>          Issue Type: Feature Request
>          Components: Beans
>    Affects Versions: 1.2.Final
>            Reporter: Chris Rankin
>
> I would like to extend {{javax.enterprise.inject.spi.InjectionPoint}} for easier analysis of both static and dynamic qualifiers.
> I have previously used {{InjectionPoint.getAnnotated()}}, but have now realised that this is not enough because it cannot include {{AnnotationLiteral}} qualifiers added via {{Instance.select(...)}}. The only reliable way to analyse _all_ of the qualifiers is currently via {{InjectionPoint.getQualifiers()}}, which unfortunately returns {{Set<Annotated>}}.
> A {{Set<Annotated>>}} is not immediately useful to me; about the only thing that I can do with it is iterate over it every time. So I must convert it into something more like this first:
> {code:language=java}
> @SuppressWarnings("unchecked")
> public class QualifierMap extends HashMap<Class<? extends Annotation>, Annotation> {
>     private static final long serialVersionUID = 1L;
>     public QualifierMap(Iterable<? extends Annotation> qualifiers) {
>         for (Annotation qualifier : qualifiers) {
>             put(qualifier.annotationType(), qualifier);
>         }
>     }
>     public <T extends Annotation> T get(Class<T> key) {
>         return (T) super.get(key);
>     }
> }
> {code}
> However, it would be much _more_ convenient if {{InjectionPoint}} could export this functionality automatically instead:
> {code:language=java}
> public interface InjectionPoint {
>     ...
>     boolean isQualifierPresent(Class<? extends Annotation> annotationType);  
>  
>     <T extends Annotation> T getQualifier(Class<T> annotationType);
>     ....
> }
> {code}



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)