/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.wicket.markup.resolver;
import org.apache.wicket.Component;
import org.apache.wicket.MarkupContainer;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.MarkupStream;
import org.apache.wicket.markup.WicketTag;
import org.apache.wicket.markup.html.WebComponent;
/**
* Usually you either have a markup file or a xml tag with wicket:id="myComponent" to associate
* markup with a component. However in some rare cases, especially when working with small panels it
* is a bit awkward to maintain tiny pieces of markup in plenty of panel markup files. Use cases are
* for example list views where list items are different depending on a state.
* <p>
* Inline panels provide a means to maintain the panels tiny piece of markup in the parents markup
* file. During the render process, when Wicket iterates over the markup file, the markup fragment
* must be ignored. It is only indirectly referenced by component.
*
* @author Juergen Donnerstag
*/
public class FragmentResolver implements IComponentResolver
{
private static final long serialVersionUID = 1L;
/** */
public static final String FRAGMENT = "fragment";
@Override
public Component resolve(final MarkupContainer container, final MarkupStream markupStream,
final ComponentTag tag)
{
// If <wicket:...>
if (tag instanceof WicketTag)
{
final WicketTag wTag = (WicketTag)tag;
// If <wicket:fragment ...>
if (wTag.isFragmentTag())
{
return new WebComponent(wTag.getId()).setVisible(false);
}
}
// We were not able to handle the tag
return null;
}
}