com.ncs.gsyt.core.base.search.hibernate.HibernateEntityMetadata.java Source code

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Here is the source code for com.ncs.gsyt.core.base.search.hibernate.HibernateEntityMetadata.java

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/* 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 com.ncs.gsyt.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 com.ncs.gsyt.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;
    }

}