com.googlecode.genericdao.search.hibernate.HibernateEntityMetadata Maven / Gradle / Ivy

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/* Copyright 2013 David Wolverton
 * 
 * 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 com.googlecode.genericdao.search.hibernate;

import java.io.Serializable;

import org.hibernate.SessionFactory;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.metadata.ClassMetadata;
import org.hibernate.type.CollectionType;
import org.hibernate.type.EntityType;
import org.hibernate.type.Type;

import com.googlecode.genericdao.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) {
		return metadata.getIdentifier(object, null);
	}

	public Class getJavaClass() {
		return metadata.getMappedClass();
	}

	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 getIdValue(object);
		else
			return metadata.getPropertyValue(object, property);
	}

	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;
	}

}