[jboss-jira] [JBoss JIRA] (WFLY-12192) Add support for injecting Optional<T> parameter types

[Weinan Li (Jira)]

     [ https://issues.jboss.org/browse/WFLY-12192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Weinan Li updated WFLY-12192:
-----------------------------
    Summary: Add support for injecting Optional<T> parameter types  (was: Support for java.util.Optional on PathParam and QueryParam)


> Add support for injecting Optional<T> parameter types
> -----------------------------------------------------
>
>                 Key: WFLY-12192
>                 URL: https://issues.jboss.org/browse/WFLY-12192
>             Project: WildFly
>          Issue Type: Feature Request
>          Components: REST
>            Reporter: Claudio Tagliola
>            Assignee: Weinan Li
>            Priority: Major
>
> Currently, PathParam and QueryParam support the following construct (from https://docs.jboss.org/resteasy/docs/3.0.17.Final/userguide/html_single/#_PathParam):
> {quote}The parameter type you inject into can be any primitive type, a String, or any Java object that has a constructor that takes a String parameter, or a static valueOf method that takes a String as a parameter.{quote}
> Proposal is to also support java.util.Optional.ofNullable as a wrapper object for Strings, which is always called. This will eliminate all null checks for optional parameters in resource classes with the different Optional followup methods, such as optional.ifPresent.



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