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Pax Wicket Service is an OSGi extension of the Wicket framework, allowing for dynamic loading and unloading of Wicket components and pageSources.

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/*
 * 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.html;

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.resolver.IComponentResolver;

/**
 * For each wicket:head tag a HeaderPartContainer is created and added to the HtmlHeaderContainer
 * which has been added to the Page.
 * 
 * @author Juergen Donnerstag
 */
public final class HeaderPartContainer extends WebMarkupContainer implements IComponentResolver
{
	private static final long serialVersionUID = 1L;

	/** The panel or bordered page the header part is associated with */
	private final MarkupContainer container;

	/** . A kind of namespace */
	private final String scope;

	/**
	 * @param id
	 *            The component id
	 * @param container
	 *            The Panel (or bordered page) the header part is associated with
	 * @param scope
	 *            The scope of the wicket:head tag
	 */
	public HeaderPartContainer(final String id, final MarkupContainer container, final String scope)
	{
		super(id);
		this.container = container;
		this.scope = scope;
	}

	/**
	 * Get the scope of the header part
	 * 
	 * @return The scope name
	 */
	public final String getScope()
	{
		return scope;
	}

	/**
	 * @see IComponentResolver#resolve(MarkupContainer, MarkupStream, ComponentTag)
	 */
	public final boolean resolve(final MarkupContainer container, final MarkupStream markupStream,
		final ComponentTag tag)
	{
		// The tag must be resolved against the panel and not against the
		// page
		Component component = this.container.get(tag.getId());
		if (component != null)
		{
			component.render(markupStream);
			return true;
		}

		return false;
	}

	/**
	 * @see #setMarkupStream(MarkupStream)
	 * 
	 * @param markupStream
	 */
	public final void setMyMarkupStream(final MarkupStream markupStream)
	{
		super.setMarkupStream(markupStream);
	}
}