[jira] [Updated] (TAP5-2016) Scala style properties unnecessarily require a field with the same name

["Jochen Kemnade (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAP5-2016?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jochen Kemnade updated TAP5-2016:
---------------------------------

    Labels: patch scala  (was: scala)

> Scala style properties unnecessarily require a field with the same name
> -----------------------------------------------------------------------
>
>                 Key: TAP5-2016
>                 URL: https://issues.apache.org/jira/browse/TAP5-2016
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: tapestry-ioc
>    Affects Versions: 5.3.6, 5.2.5
>            Reporter: Henning Petersen
>            Assignee: Howard M. Lewis Ship
>              Labels: patch, scala
>         Attachments: TAP5-2016.patch
>
>
> The changes introduced with TAP5-1064 allow Scala-style properties to be used from components without the need for Java-style getters and setters. The implementation currently requires a field of the same name as the property to exist on the bean, which is unfortunate. 
> This works:
> var value: String = _
> <input ... t:value="value" />
> This does not:
> def value(): String = ...
> def value_=(value: String) { ... }
> <input ... t:value="value" />
> A class which delegates property access to a backing bean is not recognized by PropertyAccessImpl as having any valid properties; the same is the case when the field has a different name than the property. 
> Possible workarounds include a dead field in the value class to satisfy the condition in PropertyAccessImpl, and adding Java-style getters and setters for the property.



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