/*
* 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.myfaces.view.facelets.tag.ui;
import java.io.IOException;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.el.ELException;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.FaceletException;
import javax.faces.view.facelets.TagAttribute;
import javax.faces.view.facelets.TagConfig;
import javax.faces.view.facelets.TagHandler;
import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFFaceletAttribute;
import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFFaceletTag;
import org.apache.myfaces.view.facelets.AbstractFaceletContext;
import org.apache.myfaces.view.facelets.FaceletCompositionContext;
import org.apache.myfaces.view.facelets.TemplateClient;
import org.apache.myfaces.view.facelets.tag.TagHandlerUtils;
import org.apache.myfaces.view.facelets.tag.jsf.ComponentSupport;
/**
* The decorate tag acts the same as a composition tag, but it will not trim
* everything outside of it. This is useful in cases where you have a list of
* items in a document, which you would like to be decorated or framed.
*
* The sum of it all is that you can take any element in the document and decorate
* it with some external logic as provided by the template.
*
* TODO: REFACTOR - This class could easily use a common parent with CompositionHandler
*
* @author Jacob Hookom
* @version $Id: DecorateHandler.java 1187700 2011-10-22 12:19:37Z bommel $
*/
@JSFFaceletTag(name="ui:decorate")
public final class DecorateHandler extends TagHandler implements TemplateClient
{
//private static final Logger log = Logger.getLogger("facelets.tag.ui.decorate");
private static final Logger log = Logger.getLogger(DecorateHandler.class.getName());
/**
* The resolvable URI of the template to use. The content within the decorate tag
* will be used in populating the template specified.
*/
@JSFFaceletAttribute(
name="template",
className="javax.el.ValueExpression",
deferredValueType="java.lang.String")
private final TagAttribute _template;
private final Map<String, DefineHandler> _handlers;
private final ParamHandler[] _params;
/**
* @param config
*/
public DecorateHandler(TagConfig config)
{
super(config);
_template = getRequiredAttribute("template");
_handlers = new HashMap<String, DefineHandler>();
for (DefineHandler handler : TagHandlerUtils.findNextByType(nextHandler, DefineHandler.class))
{
_handlers.put(handler.getName(), handler);
if (log.isLoggable(Level.FINE))
{
log.fine(tag + " found Define[" + handler.getName() + "]");
}
}
Collection<ParamHandler> params = TagHandlerUtils.findNextByType(nextHandler, ParamHandler.class);
if (!params.isEmpty())
{
int i = 0;
_params = new ParamHandler[params.size()];
for (ParamHandler handler : params)
{
_params[i++] = handler;
}
}
else
{
_params = null;
}
}
/*
* (non-Javadoc)
*
* @see javax.faces.view.facelets.FaceletHandler#apply(javax.faces.view.facelets.FaceletContext,
* javax.faces.component.UIComponent)
*/
public void apply(FaceletContext ctx, UIComponent parent) throws IOException, FacesException, FaceletException,
ELException
{
//VariableMapper orig = ctx.getVariableMapper();
//if (_params != null)
//{
// VariableMapper vm = new VariableMapperWrapper(orig);
// ctx.setVariableMapper(vm);
// for (int i = 0; i < _params.length; i++)
// {
// _params[i].apply(ctx, parent);
// }
//}
AbstractFaceletContext actx = (AbstractFaceletContext) ctx;
actx.pushClient(this);
if (_params != null)
{
//VariableMapper vm = new VariableMapperWrapper(orig);
//ctx.setVariableMapper(vm);
for (int i = 0; i < _params.length; i++)
{
_params[i].apply(ctx, parent);
}
}
FaceletCompositionContext fcc = FaceletCompositionContext.getCurrentInstance(ctx);
String path;
if (!_template.isLiteral())
{
String uniqueId = fcc.startComponentUniqueIdSection();
path = getTemplateValue(actx, fcc, parent, uniqueId);
ComponentSupport.saveInitialTagState(ctx, fcc, parent, uniqueId, path);
}
else
{
path = _template.getValue(ctx);
}
try
{
ctx.includeFacelet(parent, path);
}
finally
{
//ctx.setVariableMapper(orig);
actx.popClient(this);
}
if (!_template.isLiteral())
{
fcc.endComponentUniqueIdSection();
}
if ( !_template.isLiteral() && fcc.isUsingPSSOnThisView() && fcc.isRefreshTransientBuildOnPSS() && !fcc.isRefreshingTransientBuild())
{
//Mark the parent component to be saved and restored fully.
ComponentSupport.markComponentToRestoreFully(ctx.getFacesContext(), parent);
}
}
public boolean apply(FaceletContext ctx, UIComponent parent, String name) throws IOException, FacesException,
FaceletException, ELException
{
if (name != null)
{
DefineHandler handler = _handlers.get(name);
if (handler != null)
{
handler.applyDefinition(ctx, parent);
return true;
}
else
{
return false;
}
}
else
{
this.nextHandler.apply(ctx, parent);
return true;
}
}
private String getTemplateValue(FaceletContext ctx, FaceletCompositionContext fcc, UIComponent parent, String uniqueId)
{
String template = (String) ComponentSupport.restoreInitialTagState(ctx, fcc, parent, uniqueId);
if (template != null)
{
return template;
}
else
{
return this._template.getValue(ctx);
}
}
}