[JBoss JIRA] (CDI-45) Optional Injection Points

Tuesday, 11 October 2016

    [
https://issues.jboss.org/browse/CDI-45?page=com.atlassian.jira.plugin.sys...
] 

John Ament commented on CDI-45:
-------------------------------

Underestood.  The way I see it, for each Bean of type {{<T>}} there exists a Bean of
type {{Optional<T>}} that shares the same qualifiers but has scope dependent. 
Optional beans can't be looked up programmatically.

Another way to do this is to add all methods from
https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html to Instance, which would
be:

* ifPresent
* isPresent
* orElse
* orElseGet
* orElseThrow

So hm.

...
 Optional Injection Points
 -------------------------

                 Key: CDI-45
                 URL: https://issues.jboss.org/browse/CDI-45
             Project: CDI Specification Issues
          Issue Type: Feature Request
          Components: Resolution
    Affects Versions: 1.0
            Reporter: Stuart Douglas
            Priority: Optional
             Fix For: TBD

 There are occoasions where it may be useful for some injection points to be optional,
e.g.
 @Inject
 @Optional 
 MyBean bean; 
 This would behave the same as a normal injection point, however it will not cause the
deployment to fail if it is not satisified.  

--
This message was sent by Atlassian JIRA
(v6.4.11#64026)

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010