/*
* 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.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This is a tag resolver which handles <wicket:container>
*
* Sometimes adding components in certain ways may lead to output of invalid markup. For example,
* lets pretend we output table rows two at a time using a repeater. The markup would look something
* like this:
*
* <code>
* <table>
* <span wicket:id="repeater">
* <tr><td>...</td></tr>
* <tr><td>...</td></tr>
* </span>
* </table>
* </code>
*
* Notice that we had to attach the repeater to a component tag - in this case a <code>span</code>,
* but a span is not a legal tag to nest under <code>table</code>. So we can rewrite the example as
* following:
*
* <code>
* <table>
* <wicket:container wicket:id="repeater">
* <tr><td>...</td></tr>
* <tr><td>...</td></tr>
* </wicket:container>
* </table>
* </code>
*
* The above is valid markup because wicket namespaced tags are allowed anywhere
*
* @author Igor Vaynberg (ivaynberg)
*/
public class WicketContainerResolver implements IComponentResolver
{
private static final Logger log = LoggerFactory.getLogger(WicketContainerResolver.class);
private static final long serialVersionUID = 1L;
/** */
public static final String CONTAINER = "container";
@Override
public Component resolve(final MarkupContainer container, final MarkupStream markupStream,
final ComponentTag tag)
{
if (tag instanceof WicketTag && ((WicketTag)tag).isContainerTag())
{
return container.get(tag.getId());
}
return null;
}
}