[jira] [Updated] (ISIS-1056) [DUPLICATE] Support user-defined annotations (as per Spring and JSR-303 etc).

["Dan Haywood (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ISIS-1056?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dan Haywood updated ISIS-1056:
------------------------------
    Fix Version/s:     (was: 3.0.0)
                   2.0.0-M1
          Summary: [DUPLICATE] Support user-defined annotations (as per Spring and JSR-303 etc).  (was: Support user-defined annotations (as per Spring and JSR-303 etc).)

> [DUPLICATE] Support user-defined annotations (as per Spring and JSR-303 etc).
> -----------------------------------------------------------------------------
>
>                 Key: ISIS-1056
>                 URL: https://issues.apache.org/jira/browse/ISIS-1056
>             Project: Isis
>          Issue Type: New Feature
>          Components: Core
>    Affects Versions: core-1.8.0
>            Reporter: Dan Haywood
>            Priority: Major
>             Fix For: 2.0.0-M1
>
>
> eg, instead of:
> @Action(semantics=SemanticsOf.SAFE)
> @ActionLayout(contributed=Contributed.AS_ASSOCIATION)
> @CollectionLayout(render=RenderType.EAGERLY)
> public List<Foo> someFoos() { ... }
> we could allow custom annotations like this to be defined:
> @Action(semantics=SemanticsOf.SAFE)
> @ActionLayout(contributed=Contributed.AS_ASSOCIATION)
> @CollectionLayout(render=RenderType.EAGERLY)
> public @interface ContributedCollection {
> }
> which would then allow:
> @ContributedCollection
> public List<Foo> someFoos() { ... }
> ~~~~
> This might also be a good way to support value types, eg by introducing a new ValueObject and ValueObjectLayout annotations:
> @ValueObject (
>     mustSatisfy=MoneySpec.class,
>     appliesTo={BigDecimal.class}
> )
> @ValueObjectLayout(
>     named="Money"
> )
> public @interface Money {
> }
> and then:
> public void deposit(@Money BigDecimal bd) { ... }
> Behind the scenes, Isis would just be copying facets from the ObjectSpecification that represents the @Money annotation onto the parameter or property feature..



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