Custom VisitCallback implementation for resetting editable values of a form

Write a custom VisitCallback implementation for resetting editable values of a form:

public class CustomVisitCallback implements VisitCallback{

 @Override

 public VisitResult visit(VisitContext context, UIComponent target) {

  if (!target.isRendered()) {

      return VisitResult.REJECT;

  }

  if (target instanceof EditableValueHolder) {

     ((EditableValueHolder)target).resetValue();

  }

  return VisitResult.ACCEPT;

 }

}

Let's start the process of visiting nodes using the following code:

FacesContext context = FacesContext.getCurrentInstance();

UIComponent component = context.getViewRoot();

CustomVisitCallback customVisitCallback = new CustomVisitCallback();

component.visitTree(VisitContext.createVisitContext(context), customVisitCallback);

Note that the starting point in the traversal process is the view root. This is not mandatory; you can pass any other sub-tree. Per example, you may want to reset the inputs only of the current submitted form. This can be easily accomplish via OmniFaces, Components#getCurrentForm().

import org.omnifaces.util.Components;

...

FacesContext context = FacesContext.getCurrentInstance();

UIForm currentForm = Components.getCurrentForm();

CustomVisitCallback customVisitCallback = new CustomVisitCallback();

currentForm.visitTree(VisitContext.createVisitContext(context), customVisitCallback);