/**
* License Agreement.
*
* Rich Faces - Natural Ajax for Java Server Faces (JSF)
*
* Copyright (C) 2007 Exadel, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.ajax4jsf.taglib.html.facelets;
import java.io.IOException;
import javax.el.ELException;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.component.UIComponentBase;
import org.ajax4jsf.Messages;
import com.sun.facelets.FaceletContext;
import com.sun.facelets.FaceletException;
import com.sun.facelets.tag.TagAttribute;
import com.sun.facelets.tag.TagConfig;
import com.sun.facelets.tag.TagException;
import com.sun.facelets.tag.TagHandler;
/**
* Register a named facet on the UIComponent associated with the closest parent
* UIComponent custom action. <p/> See <a target="_new"
* href="http://java.sun.com/j2ee/javaserverfaces/1.1_01/docs/tlddocs/f/facet.html">tag
* documentation</a>.
*
* @author Jacob Hookom
* @version $Id: FacetHandler.java,v 1.1.2.1 2007/02/01 15:31:21 alexsmirnov Exp $
*/
public final class FacetHandler extends TagHandler {
/**
* A UIComponent for capturing a child UIComponent, representative of the
* desired Facet
*
* @author Jacob Hookom
*
*/
private final static class UIFacet extends UIComponentBase {
public String getFamily() {
return null;
}
}
protected final TagAttribute name;
public FacetHandler(TagConfig config) {
super(config);
this.name = this.getRequiredAttribute("name");
}
/* (non-Javadoc)
* @see com.sun.facelets.FaceletHandler#apply(com.sun.facelets.FaceletContext, javax.faces.component.UIComponent)
*/
public void apply(FaceletContext ctx, UIComponent parent)
throws IOException, FacesException, FaceletException, ELException {
UIFacet facet = new UIFacet();
UIComponent c;
// Check for existing facet
String facetName = this.name.getValue(ctx);
c = parent.getFacet(facetName);
if (null != c) {
parent.getFacets().remove(facetName);
facet.getChildren().add(c);
}
this.nextHandler.apply(ctx, facet);
int childCount = facet.getChildCount();
if (childCount == 1) {
c = (UIComponent) facet.getChildren().get(0);
parent.getFacets().put(facetName, c);
} else {
throw new TagException(this.tag, Messages.getMessage(Messages.FACET_TAG_MANY_CHILDREN_ERROR));
}
}
}