[jira] [Commented] (WICKET-2562) Allow Ajax FormSubmitting component without default form processing (i.e., analogous to IOnChangeListener)

["Martin Makundi (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/WICKET-2562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13244221#comment-13244221 ] 

Martin Makundi commented on WICKET-2562:
----------------------------------------

I was discussing 1.4.x.. what branch can this AjaxFormSubmitBehavior.getDefaultProcessing() be found from?
                
> Allow Ajax FormSubmitting component without default form processing (i.e., analogous to IOnChangeListener)
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: WICKET-2562
>                 URL: https://issues.apache.org/jira/browse/WICKET-2562
>             Project: Wicket
>          Issue Type: Improvement
>          Components: wicket
>    Affects Versions: 1.4.3
>            Reporter: Martin Makundi
>            Priority: Minor
>   Original Estimate: 5h
>  Remaining Estimate: 5h
>
> Workaround exists but it is a reflection hack:
> public abstract class AjaxFormSubmittingChangeListenerBehavior extends
>     AjaxFormSubmitBehavior {
>   private final static Method hiddenFieldGetter;
>   static {
>     try {
>       hiddenFieldGetter = Form.class.getDeclaredMethod("getHiddenFieldId");
>       hiddenFieldGetter.setAccessible(true);
>     } catch (Exception e) {
>       throw new RuntimeException(e);
>     }
>   }
>   
>   /**
>    * @see org.apache.wicket.ajax.AbstractDefaultAjaxBehavior#onBind()
>    */
>   @Override
>   protected void onBind() {
>     super.onBind();
>     if (!(getComponent() instanceof IOnChangeListener))
>     {
>       throw new WicketRuntimeException("Behavior " + getClass().getName() +
>         " can only be added to an instance of a IOnChangeListener");
>     }
>   }
>   /**
>    * @param event
>    */
>   public AjaxFormSubmittingChangeListenerBehavior(String event) {
>     super(event);
>   }
>   /**
>    * @see org.apache.wicket.ajax.form.AjaxFormSubmitBehavior#onError(org.apache.wicket.ajax.AjaxRequestTarget)
>    */
>   @Override
>   protected void onError(AjaxRequestTarget target) {
>     onSubmit(target);
>   }
>   /**
>    * @see org.apache.wicket.ajax.form.AjaxFormSubmitBehavior#onEvent(org.apache.wicket.ajax.AjaxRequestTarget)
>    */
>   @Override
>   protected void onEvent(AjaxRequestTarget target) {
>     org.mortbay.util.MultiMap parameters = ((org.mortbay.jetty.Request) ((WebRequest) getComponent()
>         .getRequest()).getHttpServletRequest()).getParameters();
>     parameters.put(getHiddenFieldId(getForm()), getComponent().urlFor(IOnChangeListener.INTERFACE));
>     super.onEvent(target);
>   }
>   /**
>    * @param form
>    * @return String
>    */
>   private String getHiddenFieldId(Form<?> form) {
>     try {
>       Form<?> root = form.getRootForm();
>       return (String) hiddenFieldGetter.invoke(root);
>     } catch (Exception e) {
>       throw new RuntimeException(e);
>     }
>   }
> }

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