Trying to extend a framework component

[Leonardo Quijano Vincenzi <le...@dtqsoftware.com>]

Hi again,

I'm trying to extend a form component (PropertySelection) to override 
the default (null) model used for comboboxes with a custom list. I 
created a UserSelection.jwc file (empty) and a java class, but I'm 
getting an NPE on:

Stack Trace:

    * org.apache.tapestry.form.PropertySelection.renderFormComponent(PropertySelection.java:69)

    * org.apache.tapestry.form.AbstractFormComponent.renderComponent(AbstractFormComponent.java:125)

    * org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:612)

Checking out the sources, seems like these aren't getting injected:

    /**
     * Injected.
     */
    public abstract ValidatableFieldSupport getValidatableFieldSupport();

So, when using an empty jwc file I'm basically losing the bindings 
specified in PropertySelection's jwc file, right? What am I doing wrong? 
What's the correct way of extending a base framework component, without 
specifying the full JWC bindings again?

Thanks

-- 
Ing. Leonardo Quijano Vincenzi
Director Técnico
DTQ Software




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