/*
* 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.composite;
import java.beans.BeanDescriptor;
import java.beans.BeanInfo;
import java.beans.PropertyDescriptor;
import java.io.IOException;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.el.ELException;
import javax.el.ValueExpression;
import javax.el.VariableMapper;
import javax.faces.FacesException;
import javax.faces.application.ProjectStage;
import javax.faces.application.Resource;
import javax.faces.component.ActionSource;
import javax.faces.component.EditableValueHolder;
import javax.faces.component.UIComponent;
import javax.faces.component.UIPanel;
import javax.faces.component.UniqueIdVendor;
import javax.faces.component.ValueHolder;
import javax.faces.context.FacesContext;
import javax.faces.view.AttachedObjectHandler;
import javax.faces.view.ViewDeclarationLanguage;
import javax.faces.view.facelets.ComponentConfig;
import javax.faces.view.facelets.ComponentHandler;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.FaceletException;
import javax.faces.view.facelets.FaceletHandler;
import javax.faces.view.facelets.MetaRuleset;
import javax.faces.view.facelets.Metadata;
import javax.faces.view.facelets.TagException;
import javax.faces.view.facelets.TextHandler;
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.TemplateContext;
import org.apache.myfaces.view.facelets.el.VariableMapperWrapper;
import org.apache.myfaces.view.facelets.tag.TagHandlerUtils;
import org.apache.myfaces.view.facelets.tag.jsf.ActionSourceRule;
import org.apache.myfaces.view.facelets.tag.jsf.ComponentBuilderHandler;
import org.apache.myfaces.view.facelets.tag.jsf.ComponentSupport;
import org.apache.myfaces.view.facelets.tag.jsf.EditableValueHolderRule;
import org.apache.myfaces.view.facelets.tag.jsf.ValueHolderRule;
import org.apache.myfaces.view.facelets.tag.jsf.core.AjaxHandler;
import org.apache.myfaces.view.facelets.tag.ui.DecorateHandler;
import org.apache.myfaces.view.facelets.tag.ui.IncludeHandler;
import org.apache.myfaces.view.facelets.tag.ui.InsertHandler;
/**
* This handler is responsible for apply composite components. It
* is created by CompositeResourceLibrary class when a composite component
* is found.
*
* @author Leonardo Uribe (latest modification by $Author: lu4242 $)
* @version $Revision: 964310 $ $Date: 2010-07-15 01:17:19 -0500 (Thu, 15 Jul 2010) $
*/
public class CompositeComponentResourceTagHandler extends ComponentHandler
implements ComponentBuilderHandler, TemplateClient
{
private final Resource _resource;
private Metadata _mapper;
private Class<?> _lastType = Object.class;
protected volatile Map<String, FaceletHandler> _facetHandlersMap;
protected final Collection<FaceletHandler> _componentHandlers;
protected final Collection<FaceletHandler> _facetHandlers;
public CompositeComponentResourceTagHandler(ComponentConfig config, Resource resource)
{
super(config);
_resource = resource;
_facetHandlers = TagHandlerUtils.findNextByType(nextHandler, javax.faces.view.facelets.FacetHandler.class, InsertFacetHandler.class);
_componentHandlers = TagHandlerUtils.findNextByType(nextHandler, javax.faces.view.facelets.ComponentHandler.class,
InsertChildrenHandler.class, InsertHandler.class, DecorateHandler.class, IncludeHandler.class, TextHandler.class);
}
public UIComponent createComponent(FaceletContext ctx)
{
FacesContext facesContext = ctx.getFacesContext();
UIComponent component = facesContext.getApplication().createComponent(facesContext, _resource);
// Check required attributes if the app is not on production stage.
// Unfortunately, we can't check it on constructor because we need to call
// ViewDeclarationLanguage.getComponentMetadata() and on that point it is possible to not
// have a viewId.
if (!facesContext.isProjectStage(ProjectStage.Production))
{
BeanInfo beanInfo = (BeanInfo) component.getAttributes().get(UIComponent.BEANINFO_KEY);
for (PropertyDescriptor propertyDescriptor : beanInfo.getPropertyDescriptors())
{
ValueExpression ve = (ValueExpression) propertyDescriptor.getValue("required");
if (ve != null)
{
Object value = ve.getValue (facesContext.getELContext());
Boolean required = null;
if (value instanceof Boolean)
{
required = (Boolean) value;
}
else
{
required = Boolean.getBoolean(value.toString());
}
if (required != null && required.booleanValue())
{
Object attrValue = this.tag.getAttributes().get (propertyDescriptor.getName());
if (attrValue == null)
{
throw new TagException(this.tag, "Attribute '" + propertyDescriptor.getName() + "' is required");
}
}
}
}
}
return component;
}
@SuppressWarnings("unchecked")
@Override
public void applyNextHandler(FaceletContext ctx, UIComponent c)
throws IOException
{
//super.applyNextHandler(ctx, c);
applyNextHandlerIfNotApplied(ctx, c);
applyCompositeComponentFacelet(ctx,c);
if (ComponentHandler.isNew(c))
{
FacesContext facesContext = ctx.getFacesContext();
ViewDeclarationLanguage vdl = facesContext.getApplication().getViewHandler().
getViewDeclarationLanguage(facesContext, facesContext.getViewRoot().getViewId());
FaceletCompositionContext mctx = FaceletCompositionContext.getCurrentInstance(ctx);
List<AttachedObjectHandler> handlers = mctx.getAttachedObjectHandlers(c);
if (handlers != null)
{
vdl.retargetAttachedObjects(facesContext, c, handlers);
// remove the list of handlers, as it is no longer necessary
mctx.removeAttachedObjectHandlers(c);
}
vdl.retargetMethodExpressions(facesContext, c);
if ( FaceletCompositionContext.getCurrentInstance(ctx).isMarkInitialState())
{
// Call it only if we are using partial state saving
c.markInitialState();
// Call it to other components created not bound by a tag handler
c.getFacet(UIComponent.COMPOSITE_FACET_NAME).markInitialState();
}
}
}
@SuppressWarnings("unchecked")
protected void applyNextHandlerIfNotApplied(FaceletContext ctx, UIComponent c)
throws IOException
{
//Apply all facelets not applied yet.
CompositeComponentBeanInfo beanInfo =
(CompositeComponentBeanInfo) c.getAttributes().get(UIComponent.BEANINFO_KEY);
BeanDescriptor beanDescriptor = beanInfo.getBeanDescriptor();
boolean insertChildrenUsed = (beanDescriptor.getValue(InsertChildrenHandler.INSERT_CHILDREN_USED) != null);
List<String> insertFacetList = (List<String>) beanDescriptor.getValue(InsertFacetHandler.INSERT_FACET_USED);
if (nextHandler instanceof javax.faces.view.facelets.CompositeFaceletHandler)
{
for (FaceletHandler handler : ((javax.faces.view.facelets.CompositeFaceletHandler)nextHandler).getHandlers())
{
if (handler instanceof javax.faces.view.facelets.FacetHandler)
{
if (insertFacetList == null || !insertFacetList.contains( ((javax.faces.view.facelets.FacetHandler)handler).getFacetName(ctx)))
{
handler.apply(ctx, c);
}
}
else if (handler instanceof InsertFacetHandler)
{
if (insertFacetList == null || !insertFacetList.contains( ((InsertFacetHandler)handler).getFacetName(ctx)))
{
handler.apply(ctx, c);
}
}
else if (insertChildrenUsed)
{
if (!(handler instanceof javax.faces.view.facelets.ComponentHandler ||
handler instanceof InsertChildrenHandler ||
handler instanceof InsertHandler ||
handler instanceof DecorateHandler ||
handler instanceof IncludeHandler ||
handler instanceof TextHandler))
{
handler.apply(ctx, c);
}
}
else
{
handler.apply(ctx, c);
}
}
}
else
{
if (nextHandler instanceof javax.faces.view.facelets.FacetHandler)
{
if (insertFacetList == null || !insertFacetList.contains( ((javax.faces.view.facelets.FacetHandler)nextHandler).getFacetName(ctx)) )
{
nextHandler.apply(ctx, c);
}
}
else if (nextHandler instanceof InsertFacetHandler)
{
if (insertFacetList == null || !insertFacetList.contains( ((InsertFacetHandler)nextHandler).getFacetName(ctx)) )
{
nextHandler.apply(ctx, c);
}
}
else if (insertChildrenUsed)
{
if (!(nextHandler instanceof javax.faces.view.facelets.ComponentHandler ||
nextHandler instanceof InsertChildrenHandler ||
nextHandler instanceof InsertHandler ||
nextHandler instanceof DecorateHandler ||
nextHandler instanceof IncludeHandler ||
nextHandler instanceof TextHandler))
{
nextHandler.apply(ctx, c);
}
}
else
{
nextHandler.apply(ctx, c);
}
}
}
protected void applyCompositeComponentFacelet(FaceletContext faceletContext, UIComponent compositeComponentBase)
throws IOException
{
FaceletCompositionContext mctx = FaceletCompositionContext.getCurrentInstance(faceletContext);
AbstractFaceletContext actx = (AbstractFaceletContext) faceletContext;
UIPanel compositeFacetPanel = (UIPanel) compositeComponentBase.getFacets().get(UIComponent.COMPOSITE_FACET_NAME);
if (compositeFacetPanel == null)
{
compositeFacetPanel = (UIPanel)
faceletContext.getFacesContext().getApplication().createComponent(UIPanel.COMPONENT_TYPE);
compositeComponentBase.getFacets().put(UIComponent.COMPOSITE_FACET_NAME, compositeFacetPanel);
// Set an id to the created facet component, to prevent id generation and make
// partial state saving work without problem.
UniqueIdVendor uniqueIdVendor = mctx.getUniqueIdVendorFromStack();
if (uniqueIdVendor == null)
{
uniqueIdVendor = ComponentSupport.getViewRoot(faceletContext, compositeComponentBase);
}
if (uniqueIdVendor != null)
{
// UIViewRoot implements UniqueIdVendor, so there is no need to cast to UIViewRoot
// and call createUniqueId()
String uid = uniqueIdVendor.createUniqueId(faceletContext.getFacesContext(),null);
compositeFacetPanel.setId(uid);
}
}
// Before call applyCompositeComponent we need to add ajax behaviors
// to the current compositeComponentBase. Note that super.applyNextHandler()
// has already been called, but this point is before vdl.retargetAttachedObjects,
// so we can't but this on ComponentTagHandlerDelegate, if we want this to be
// applied correctly.
Iterator<AjaxHandler> it = ((AbstractFaceletContext) faceletContext).getAjaxHandlers();
if (it != null)
{
while(it.hasNext())
{
mctx.addAttachedObjectHandler(
compositeComponentBase, it.next());
}
}
VariableMapper orig = faceletContext.getVariableMapper();
try
{
faceletContext.setVariableMapper(new VariableMapperWrapper(orig));
actx.pushCompositeComponentClient(this);
actx.applyCompositeComponent(compositeFacetPanel, _resource);
}
finally
{
actx.popCompositeComponentClient();
faceletContext.setVariableMapper(orig);
}
}
@Override
public void setAttributes(FaceletContext ctx, Object instance)
{
if (instance != null)
{
UIComponent component = (UIComponent) instance;
Class<?> type = instance.getClass();
if (_mapper == null || !_lastType.equals(type))
{
_lastType = type;
BeanInfo beanInfo = (BeanInfo)((UIComponent) component).getAttributes().get(UIComponent.BEANINFO_KEY);
_mapper = createMetaRuleset(type , beanInfo).finish();
}
_mapper.applyMetadata(ctx, instance);
}
}
protected MetaRuleset createMetaRuleset(Class<?> type, BeanInfo beanInfo)
{
MetaRuleset m = new CompositeMetaRulesetImpl(this.getTag(), type, beanInfo);
// ignore standard component attributes
m.ignore("binding").ignore("id");
// add auto wiring for attributes
m.addRule(CompositeComponentRule.Instance);
// add retarget method expression rules
m.addRule(RetargetMethodExpressionRule.Instance);
if (ActionSource.class.isAssignableFrom(type))
{
m.addRule(ActionSourceRule.Instance);
}
if (ValueHolder.class.isAssignableFrom(type))
{
m.addRule(ValueHolderRule.Instance);
if (EditableValueHolder.class.isAssignableFrom(type))
{
m.ignore("submittedValue");
m.ignore("valid");
m.addRule(EditableValueHolderRule.Instance);
}
}
return m;
}
public boolean apply(FaceletContext ctx, UIComponent parent, String name)
throws IOException, FacesException, FaceletException, ELException
{
if (name != null)
{
//1. Initialize map used to retrieve facets
if (_facetHandlers == null || _facetHandlers.isEmpty())
{
return true;
}
if (_facetHandlersMap == null)
{
Map<String, FaceletHandler> map = new HashMap<String, FaceletHandler>();
for (FaceletHandler handler : _facetHandlers)
{
if (handler instanceof javax.faces.view.facelets.FacetHandler )
{
map.put( ((javax.faces.view.facelets.FacetHandler)handler).getFacetName(ctx), handler);
}
else if (handler instanceof InsertFacetHandler)
{
map.put( ((InsertFacetHandler)handler).getFacetName(ctx), handler);
}
}
_facetHandlersMap = map;
}
FaceletHandler handler = _facetHandlersMap.get(name);
if (handler != null)
{
AbstractFaceletContext actx = (AbstractFaceletContext) ctx;
TemplateContext itc = actx.popTemplateContext();
try
{
handler.apply(ctx, parent);
}
finally
{
actx.pushTemplateContext(itc);
}
return true;
}
else
{
return true;
}
}
else
{
AbstractFaceletContext actx = (AbstractFaceletContext) ctx;
TemplateContext itc = actx.popTemplateContext();
try
{
for (FaceletHandler handler : _componentHandlers)
{
handler.apply(ctx, parent);
}
}
finally
{
actx.pushTemplateContext(itc);
}
return true;
}
}
}