/*
* 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.extensions.validator.core.metadata.extractor;
import java.util.logging.Logger;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import org.apache.myfaces.extensions.validator.core.metadata.MetaDataEntry;
import org.apache.myfaces.extensions.validator.core.property.DefaultPropertyInformation;
import org.apache.myfaces.extensions.validator.core.property.PropertyDetails;
import org.apache.myfaces.extensions.validator.core.property.PropertyInformation;
import org.apache.myfaces.extensions.validator.core.property.PropertyInformationKeys;
import org.apache.myfaces.extensions.validator.core.storage.MetaDataStorage;
import org.apache.myfaces.extensions.validator.internal.Priority;
import org.apache.myfaces.extensions.validator.internal.ToDo;
import org.apache.myfaces.extensions.validator.internal.UsageCategory;
import org.apache.myfaces.extensions.validator.internal.UsageInformation;
import org.apache.myfaces.extensions.validator.util.ExtValAnnotationUtils;
import org.apache.myfaces.extensions.validator.util.ExtValUtils;
import org.apache.myfaces.extensions.validator.util.ProxyUtils;
/**
* Default implementation which extracts meta-data (e.g. the annotations) of the value binding of a component.
* It extracts the meta-data of the field and the property.
* (Also the annotations of super classes and interfaces.)
*
* @author Gerhard Petracek
* @since 1.x.1
*/
@UsageInformation(UsageCategory.INTERNAL)
public class DefaultComponentMetaDataExtractor implements MetaDataExtractor
{
protected final Logger logger = Logger.getLogger(getClass().getName());
public DefaultComponentMetaDataExtractor()
{
logger.fine(getClass().getName() + " instantiated");
}
@ToDo(Priority.MEDIUM)
public PropertyInformation extract(FacesContext facesContext, Object object)
{
//should never occur
if (!(object instanceof UIComponent))
{
if (object != null)
{
this.logger.warning(object.getClass() + " is no valid component");
}
return new DefaultPropertyInformation();
}
UIComponent uiComponent = (UIComponent) object;
logger.finest("start extracting meta-data of " + uiComponent.getClass().getName());
PropertyDetails propertyDetails = ExtValUtils.getELHelper().getPropertyDetailsOfValueBinding(uiComponent);
if (propertyDetails == null)
{
return new DefaultPropertyInformation();
}
/*
* get bean class and property name
*/
Class entityClass = ProxyUtils.getUnproxiedClass(propertyDetails.getBaseObject().getClass());
PropertyInformation propertyInformation = getPropertyInformation(entityClass, propertyDetails);
logger.finest("extract finished");
return propertyInformation;
}
protected PropertyInformation getPropertyInformation(Class entityClass, PropertyDetails propertyDetails)
{
MetaDataStorage storage = getMetaDataStorage();
PropertyInformation propertyInformation = new DefaultPropertyInformation();
if (isCached(storage, entityClass, propertyDetails.getProperty()))
{
//create
propertyInformation.setInformation(PropertyInformationKeys.PROPERTY_DETAILS, propertyDetails);
for (MetaDataEntry metaDataEntry : getCachedMetaData(storage, entityClass, propertyDetails.getProperty()))
{
propertyInformation.addMetaDataEntry(metaDataEntry);
}
}
else
{
propertyInformation = ExtValAnnotationUtils.extractAnnotations(entityClass, propertyDetails);
cacheMetaData(storage, propertyInformation);
}
return propertyInformation;
}
protected boolean isCached(MetaDataStorage storage, Class entityClass, String property)
{
return storage.containsMetaDataFor(entityClass, property);
}
protected void cacheMetaData(MetaDataStorage storage, PropertyInformation propertyInformation)
{
storage.storeMetaDataOf(propertyInformation);
}
protected MetaDataEntry[] getCachedMetaData(MetaDataStorage storage, Class entityClass, String property)
{
return storage.getMetaData(entityClass, property);
}
protected MetaDataStorage getMetaDataStorage()
{
return ExtValUtils.getStorage(MetaDataStorage.class, MetaDataStorage.class.getName());
}
}