[jira] [Commented] (TAP5-736) TextField validate parameter allows Null, but throws NPE

["Christian Köberl (Commented JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TAP5-736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13214899#comment-13214899 ] 

Christian Köberl commented on TAP5-736:
---------------------------------------

Could be  easily solved by setting allowNull to false in AbstractTextField:

@Parameter(defaultPrefix = BindingConstants.VALIDATE, allowNull = false)
@SuppressWarnings("unchecked")
private FieldValidator<Object> validate;
                
> TextField validate parameter allows Null, but throws NPE
> --------------------------------------------------------
>
>                 Key: TAP5-736
>                 URL: https://issues.apache.org/jira/browse/TAP5-736
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: tapestry-core
>    Affects Versions: 5.1.0.5
>            Reporter: Lukasz Jazgar
>
> Component TextField has parameter "validate" annotated by
>    @Parameter(defaultPrefix = BindingConstants.VALIDATE)
> There is no attribute allowNull, but it has default value "true" (http://tapestry.apache.org/tapestry5.1/apidocs/org/apache/tapestry5/annotations/Parameter.html#allowNull()). 
> So null value is allowed according to specification.
> But if you set parameter validate to null, NullPointerException is thrown from AbstractTextProperties.begin(MarkupWriter writer), line: 173.

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