/*
* 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.tobago.facelets.extension;
import org.apache.myfaces.tobago.component.Attributes;
import org.apache.myfaces.tobago.util.ComponentUtils;
import javax.el.ELException;
import javax.faces.FacesException;
import javax.faces.application.Application;
import javax.faces.component.UIComponent;
import javax.faces.component.UIViewRoot;
import javax.faces.view.facelets.ComponentConfig;
import javax.faces.view.facelets.ComponentHandler;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.MetaRuleset;
import javax.faces.view.facelets.Metadata;
import javax.faces.view.facelets.TagAttribute;
import java.io.IOException;
/**
* Base class of the Facelets handlers for the <tx:menuXXX /> extension tags.
*/
public abstract class TobagoMenuExtensionHandler extends ComponentHandler {
private Class subComponentLastType = Object.class;
private Metadata subComponentMapper;
private TagAttribute fieldIdAttribute;
public TobagoMenuExtensionHandler(ComponentConfig config) {
super(config);
fieldIdAttribute = getAttribute("fieldId");
}
protected abstract String getSubComponentType();
protected abstract String getSubRendererType();
protected abstract String getFacetName();
public void applyNextHandler(FaceletContext faceletContext, UIComponent menuCommand)
throws IOException, FacesException, ELException {
if (ComponentHandler.isNew(menuCommand)) {
UIComponent component = (UIComponent) menuCommand.getFacets().remove(getFacetName());
nextHandler.apply(faceletContext, component);
menuCommand.getFacets().put(getFacetName(), component);
} else {
nextHandler.apply(faceletContext, menuCommand.getFacet(getFacetName()));
}
}
public void onComponentCreated(FaceletContext faceletContext, UIComponent menuCommand, UIComponent parent) {
Application application = faceletContext.getFacesContext().getApplication();
UIViewRoot root = ComponentUtils.findViewRoot(faceletContext, parent);
UIComponent component = application.createComponent(getSubComponentType());
final String uid;
if (fieldIdAttribute != null) {
uid = fieldIdAttribute.getValue(faceletContext);
} else {
uid = root.createUniqueId();
}
component.setId(uid);
component.setRendererType(getSubRendererType());
setSubComponentAttributes(faceletContext, component);
menuCommand.getFacets().put(getFacetName(), component);
}
private void setSubComponentAttributes(FaceletContext ctx, Object instance) {
if (instance != null) {
Class type = instance.getClass();
if (subComponentMapper == null || !subComponentLastType.equals(type)) {
subComponentLastType = type;
subComponentMapper = createSubComponentMetaRuleset(type).finish();
}
subComponentMapper.applyMetadata(ctx, instance);
}
}
protected MetaRuleset createSubComponentMetaRuleset(Class aClass) {
MetaRuleset metaRuleset = super.createMetaRuleset(aClass);
TagAttribute [] attrs = tag.getAttributes().getAll();
for (int i = 0; i < attrs.length; i++) {
TagAttribute attr = attrs[i];
if (!(attr.getLocalName().equals(Attributes.CONVERTER)
|| attr.getLocalName().equals(Attributes.VALUE))) {
metaRuleset.ignore(attr.getLocalName());
}
}
return metaRuleset;
}
protected MetaRuleset createMetaRuleset(Class aClass) {
MetaRuleset metaRuleset = super.createMetaRuleset(aClass);
metaRuleset.ignore(Attributes.CONVERTER);
metaRuleset.ignore(Attributes.VALUE);
return metaRuleset;
}
}