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Date: Sat, 25 Feb 2017 01:30:44 +0000 (UTC)
From: "Niclas Hedhman (JIRA)" <jira@apache.org>
To: dev@polygene.apache.org
Message-ID: <JIRA.12840483.1435224566000.62090.1487986244325@Atlassian.JIRA>
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Subject: [jira] [Closed] (POLYGENE-36) Java 8 Predicates to be used for
 Constraints?
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archived-at: Sat, 25 Feb 2017 01:30:49 -0000


     [ https://issues.apache.org/jira/browse/POLYGENE-36?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Niclas Hedhman closed POLYGENE-36.
----------------------------------
    Resolution: Won't Fix

After investigating the consequences of this, I am against this change.

Just because a more abstract abstraction can be used, doesn't mean that it should be used. We prize explicit expressions over obscure generalities, and we should not start here.

> Java 8 Predicates to be used for Constraints?
> ---------------------------------------------
>
>                 Key: POLYGENE-36
>                 URL: https://issues.apache.org/jira/browse/POLYGENE-36
>             Project: Polygene
>          Issue Type: Improvement
>            Reporter: Niclas Hedhman
>            Assignee: Niclas Hedhman
>             Fix For: 3.0
>
>
> In Java 8, the Predicate class is suitable to be used for Constraints. And I think we should leverage the versatility of this on Ver 3.0
> The difference is that the Predicate.test() method is lacking the Annotation argument, which often used to pass arguments to the constraint. But we can equally easily inject the annotation instead.
> I think that that org.qi4j.api.constraint.Constraint class has no purpose, other than for compatibility reason, but I might be wrong.


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