org.nextframework.persistence.HibernateUtils.java Source code

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Here is the source code for org.nextframework.persistence.HibernateUtils.java

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/*
 * Next Framework http://www.nextframework.org
 * Copyright (C) 2009 the original author or authors.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * You may obtain a copy of the license at
 * 
 *     http://www.gnu.org/copyleft/lesser.html
 * 
 */
package org.nextframework.persistence;

import java.io.Serializable;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.collection.spi.PersistentCollection;
import org.hibernate.proxy.HibernateProxy;
import org.hibernate.proxy.LazyInitializer;
import org.springframework.orm.hibernate4.HibernateTemplate;

public class HibernateUtils {

    static Log log = LogFactory.getLog(HibernateUtils.class);

    public static Object getId(HibernateTemplate hibernateTemplate, Object bean) {
        return PersistenceUtils.getId(bean, hibernateTemplate.getSessionFactory());
    }

    public static String getIdAttribute(HibernateTemplate hibernateTemplate, Class<? extends Object> class1) {
        while (class1.getName().contains("$$")) {
            class1 = class1.getSuperclass();
        }
        return hibernateTemplate.getSessionFactory().getClassMetadata(class1).getIdentifierPropertyName();
    }

    public static String getEntityName(HibernateTemplate hibernateTemplate, Class<? extends Object> class1) {
        while (class1.getName().contains("$$")) {
            class1 = class1.getSuperclass();
        }
        return hibernateTemplate.getSessionFactory().getClassMetadata(class1).getEntityName();
    }

    public static boolean isLazy(Object value) {
        if (value instanceof HibernateProxy) {
            LazyInitializer hibernateLazyInitializer = ((HibernateProxy) value).getHibernateLazyInitializer();
            return hibernateLazyInitializer.isUninitialized();
        } else if (value instanceof PersistentCollection) {
            return !((PersistentCollection) value).wasInitialized();
        }
        return false;
    }

    @SuppressWarnings("unchecked")
    public static <E> E getLazyValue(E value) {
        if (value instanceof HibernateProxy) {
            LazyInitializer hibernateLazyInitializer = ((HibernateProxy) value).getHibernateLazyInitializer();
            if (hibernateLazyInitializer.isUninitialized()) {
                try {
                    Class<?> superclass = value.getClass().getSuperclass();
                    Serializable identifier = hibernateLazyInitializer.getIdentifier();

                    value = loadValue(value, superclass, identifier);
                } catch (IllegalArgumentException e) {
                } catch (SecurityException e) {
                }
            }
        } else if (value instanceof PersistentCollection) {
            try {
                PersistentCollection collection = (PersistentCollection) value;
                if (!collection.wasInitialized()) {
                    Object owner = collection.getOwner();
                    String role = collection.getRole();
                    value = (E) DAOUtils.getDAOForClass(owner.getClass()).loadCollection(owner,
                            role.substring(role.lastIndexOf('.') + 1));
                    System.out.println("COLECAO LAZY " + owner.getClass().getSimpleName() + "." + role);
                }
            } catch (Exception e) {
                //se nao conseguir carregar o valor lazy, no fazer nada
            }
        }
        return value;
    }

    public static <E> E loadValue(E value, Class<?> superclass, Serializable identifier) {
        if (identifier != null) {
            GenericDAO<?> daoForClass = DAOUtils.getDAOForClass(superclass);
            Object newValue = daoForClass.loadById(identifier);
            //new QueryBuilder(Next.getObject(HibernateTemplate.class)).from(superclass).idEq(identifier).unique();
            if (newValue != null) {
                value = (E) newValue;
            } else {
                log.warn("Cannot find " + superclass.getSimpleName() + " with id " + identifier + " in database.");
            }
            log.warn("Loading object of " + superclass + " lazily. Use leftOuterJoinFetch on query to avoid this.");
        }
        return value;
    }
}