/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.faces.facelets.tag.jsf.core;
import com.sun.faces.facelets.tag.TagHandlerImpl;
import com.sun.faces.util.FacesLogger;
import com.sun.faces.util.Util;
import javax.faces.application.Application;
import javax.faces.component.UIComponent;
import javax.faces.component.UIPanel;
import javax.faces.component.UIViewRoot;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.TagConfig;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* <p>
* This is a specialized <code>FacetHandler</code> to enable
* <code>f:metadata</code> support.
*
* </p>
*/
public class MetadataHandler extends TagHandlerImpl {
private static final Logger LOGGER = FacesLogger.TAGLIB.getLogger();
// ------------------------------------------------------------ Constructors
public MetadataHandler(TagConfig config) {
super(config);
}
// ------------------------------------------------- Methods from TagHandler
public void apply(FaceletContext ctx, UIComponent parent)
throws IOException {
Util.notNull("parent", parent);
UIViewRoot root;
if (parent instanceof UIViewRoot) {
root = (UIViewRoot) parent;
} else {
root = ctx.getFacesContext().getViewRoot();
}
if (root == null) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, "jsf.metadata.uiviewroot.unavailable");
}
return;
}
UIComponent facetComponent = null;
if (root.getFacetCount() > 0) {
facetComponent = root.getFacets().get(UIViewRoot.METADATA_FACET_NAME);
}
if (facetComponent == null) {
root.getAttributes().put(FacetHandler.KEY,
UIViewRoot.METADATA_FACET_NAME);
try {
this.nextHandler.apply(ctx, root);
} finally {
root.getAttributes().remove(FacetHandler.KEY);
}
facetComponent = root.getFacets().get(UIViewRoot.METADATA_FACET_NAME);
if (facetComponent != null && !(facetComponent instanceof UIPanel)) {
Application app = ctx.getFacesContext().getApplication();
UIComponent panelGroup = app.createComponent(UIPanel.COMPONENT_TYPE);
panelGroup.getChildren().add(facetComponent);
root.getFacets().put(UIViewRoot.METADATA_FACET_NAME, panelGroup);
facetComponent = panelGroup;
facetComponent.setId(UIViewRoot.METADATA_FACET_NAME);
}
}
}
}