org.wicketstuff.jsr303.PropertyValidation Maven / Gradle / Ivy
package org.wicketstuff.jsr303;
import org.apache.wicket.Component;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.FormComponent;
import org.apache.wicket.model.AbstractPropertyModel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.util.visit.IVisit;
import org.apache.wicket.util.visit.IVisitor;
/**
* Behavior to be added to either a FormComponent or Form. If used on a FormComponent, it has to be
* bound to an AbstractPropertyModel. When used on a Form, this behavior will be added to all
* appropriate FormComponents.
*/
public class PropertyValidation extends Behavior
{
private static final long serialVersionUID = 1L;
static class JSR303ValidatorFormComponentVisitor implements IVisitor
{
public void component(Component component, IVisit visit)
{
if (component instanceof FormComponent)
{
final FormComponent fc = (FormComponent)component;
addValidator(fc, true);
}
}
}
private boolean assigned = false;
@Override
public void onConfigure(Component context)
{
if (!assigned)
{
assigned = true;
if (context instanceof Form)
{
final Form form = (Form)context;
form.visitChildren(new JSR303ValidatorFormComponentVisitor());
}
else
{
if (context instanceof FormComponent)
{
final FormComponent fc = (FormComponent)context;
addValidator(fc, false);
}
else
{
throw new IllegalStateException(
"Can only be applied to Forms or FormComponents");
}
}
}
super.onConfigure(context);
}
private static void addValidator(FormComponent fc, boolean ignoreIncompatibleModel)
{
final IModel model = fc.getModel();
if (model != null)
{
if (model instanceof AbstractPropertyModel)
{
final AbstractPropertyModel pm = (AbstractPropertyModel)model;
PropertyValidator validator = new PropertyValidator(pm, fc);
fc.add(validator);
}
else if (!ignoreIncompatibleModel)
{
throw new IllegalArgumentException(
"Expected something that provides an AbstractPropertyModel");
}
}
}
}