/* Copyright 2009 The Revere Group
*
* Licensed 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.chinasb.framework.core.base.search.hibernate;
import java.io.Serializable;
import org.hibernate.EntityMode;
import org.hibernate.SessionFactory;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.metadata.ClassMetadata;
import org.hibernate.proxy.HibernateProxy;
import org.hibernate.type.CollectionType;
import org.hibernate.type.EntityType;
import org.hibernate.type.Type;
import org.chinasb.framework.core.base.search.Metadata;
/**
* Implementation of Metadata for a Hibernate entity.
*
* @author dwolverton
*/
public class HibernateEntityMetadata implements Metadata {
private SessionFactory sessionFactory;
private ClassMetadata metadata;
private Class<?> collectionType;
public HibernateEntityMetadata(SessionFactory sessionFactory, ClassMetadata classMetadata, Class<?> collectionType) {
this.sessionFactory = sessionFactory;
this.metadata = classMetadata;
this.collectionType = collectionType;
}
public String getEntityName() {
return metadata.getEntityName();
}
public String getIdProperty() {
return metadata.getIdentifierPropertyName();
}
public Metadata getIdType() {
return new HibernateNonEntityMetadata(sessionFactory, metadata.getIdentifierType(), null);
}
public Serializable getIdValue(Object object) {
if (object instanceof HibernateProxy) {
return ((HibernateProxy) object).getHibernateLazyInitializer().getIdentifier();
} else {
return metadata.getIdentifier(object, EntityMode.POJO);
}
}
public Class<?> getJavaClass() {
return metadata.getMappedClass(EntityMode.POJO);
}
public String[] getProperties() {
String[] pn = metadata.getPropertyNames();
String[] result = new String[pn.length + 1];
result[0] = metadata.getIdentifierPropertyName();
for (int i = 0; i < pn.length; i++) {
result[i+1] = pn[i];
}
return result;
}
public Metadata getPropertyType(String property) {
Type pType = metadata.getPropertyType(property);
Class<?> pCollectionType = null;
if (pType.isCollectionType()) {
pType = ((CollectionType)pType).getElementType((SessionFactoryImplementor) sessionFactory);
pCollectionType = pType.getReturnedClass();
}
if (pType.isEntityType()) {
return new HibernateEntityMetadata(sessionFactory, sessionFactory.getClassMetadata(((EntityType)pType).getName()), pCollectionType);
} else {
return new HibernateNonEntityMetadata(sessionFactory, pType, pCollectionType);
}
}
public Object getPropertyValue(Object object, String property) {
if (getIdProperty().equals(property))
return metadata.getIdentifier(object, EntityMode.POJO);
else
return metadata.getPropertyValue(object, property, EntityMode.POJO);
}
public boolean isCollection() {
return collectionType != null;
}
public Class<?> getCollectionClass() {
return collectionType;
}
public boolean isEmeddable() {
return false;
}
public boolean isEntity() {
return true;
}
public boolean isNumeric() {
return false;
}
public boolean isString() {
return false;
}
}