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Comment: Add a section about the automatically migrated attributes

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An Ajax request can have 0 or more IAjaxCallListener's.
o.a.w.ajax.attributes.AjaxCallListener is an adapter of IAjaxCallListener that implements all methods with noop bodies. If the body returns null or empty string then it is discarded.

Automatically migrated attributes.

Some of the attributes are available from the previous versions of Wicket as an overridable methods in AbstractDefaultAjaxBehavior. These methods are marked as deprecated and will be removed in Wicket 7.0 and for now Wicket automatically translates them into AjaxRequestAttributes.
These methods are:

  • org.apache.wicket.ajax.AbstractDefaultAjaxBehavior#getPreconditionScript()
  • org.apache.wicket.ajax.AbstractDefaultAjaxBehavior#getSuccessScript()
  • org.apache.wicket.ajax.AbstractDefaultAjaxBehavior#getFailureScript()
  • org.apache.wicket.ajax.AbstractDefaultAjaxBehavior#getChannel()

It is recommended to override org.apache.wicket.ajax.AbstractDefaultAjaxBehavior#updateAjaxAttributes(AjaxRequestAttributes) and configure those directly in the passed 'attributes'.