/**
* Licensed under the Common Development and Distribution License,
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.sun.com/cddl/
*
* 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 com.sun.facelets.tag.ui;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.el.ELException;
import javax.el.VariableMapper;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import com.sun.facelets.FaceletContext;
import com.sun.facelets.FaceletException;
import com.sun.facelets.FaceletHandler;
import com.sun.facelets.TemplateClient;
import com.sun.facelets.el.VariableMapperWrapper;
import com.sun.facelets.tag.TagAttribute;
import com.sun.facelets.tag.TagConfig;
import com.sun.facelets.tag.TagHandler;
/**
* @author Jacob Hookom
* @version $Id: CompositionHandler.java,v 1.12 2007/08/09 16:54:44 rlubke Exp $
*/
public final class CompositionHandler extends TagHandler implements
TemplateClient {
private final Logger log = Logger.getLogger("facelets.tag.ui.composition");
public final static String Name = "composition";
protected final TagAttribute template;
protected final Map handlers;
protected final ParamHandler[] params;
/**
* @param config
*/
public CompositionHandler(TagConfig config) {
super(config);
this.template = this.getAttribute("template");
if (this.template != null) {
this.handlers = new HashMap();
Iterator itr = this.findNextByType(DefineHandler.class);
DefineHandler d = null;
while (itr.hasNext()) {
d = (DefineHandler) itr.next();
this.handlers.put(d.getName(), d);
if (log.isLoggable(Level.FINE)) {
log.fine(tag + " found Define[" + d.getName() + "]");
}
}
List paramC = new ArrayList();
itr = this.findNextByType(ParamHandler.class);
while (itr.hasNext()) {
paramC.add(itr.next());
}
if (paramC.size() > 0) {
this.params = new ParamHandler[paramC.size()];
for (int i = 0; i < this.params.length; i++) {
this.params[i] = (ParamHandler) paramC.get(i);
}
} else {
this.params = null;
}
} else {
this.params = null;
this.handlers = null;
}
}
/*
* (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 {
if (this.template != null) {
VariableMapper orig = ctx.getVariableMapper();
if (this.params != null) {
VariableMapper vm = new VariableMapperWrapper(orig);
ctx.setVariableMapper(vm);
for (int i = 0; i < this.params.length; i++) {
this.params[i].apply(ctx, parent);
}
}
ctx.extendClient(this);
try {
ctx.includeFacelet(parent, this.template.getValue(ctx));
} finally {
ctx.popClient(this);
ctx.setVariableMapper(orig);
}
} else {
this.nextHandler.apply(ctx, parent);
}
}
public boolean apply(FaceletContext ctx, UIComponent parent, String name)
throws IOException, FacesException, FaceletException, ELException {
if (name != null) {
if (this.handlers == null) {
return false;
}
DefineHandler handler = (DefineHandler) this.handlers.get(name);
if (handler != null) {
handler.applyDefinition(ctx, parent);
return true;
} else {
return false;
}
} else {
this.nextHandler.apply(ctx, parent);
return true;
}
}
}