ru.codemine.ccms.dao.GenericDAOImpl.java Source code

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Here is the source code for ru.codemine.ccms.dao.GenericDAOImpl.java

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/*
 * Copyright (C) 2016 Alexander Savelev
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

package ru.codemine.ccms.dao;

import java.io.Serializable;
import java.lang.reflect.ParameterizedType;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;

/**
 *
 * @author Alexander Savelev
 * @param <T> ?? ??
 * @param <PK>  
 */
public class GenericDAOImpl<T, PK extends Serializable> implements GenericDAO<T, PK> {
    @Autowired
    private SessionFactory sessionFactory;

    private final Class<T> entityClass;

    public GenericDAOImpl() {
        ParameterizedType genericSuperclass = (ParameterizedType) getClass().getGenericSuperclass();
        this.entityClass = (Class<T>) genericSuperclass.getActualTypeArguments()[0];
    }

    protected Session getSession() {
        return sessionFactory.getCurrentSession();
    }

    @Override
    public void create(T t) {
        getSession().save(t);
    }

    @Override
    public void delete(T t) {
        getSession().delete(t);
    }

    @Override
    public void deleteById(PK id) {
        T t = getById(id);
        if (t != null)
            getSession().delete(t);
    }

    @Override
    public void update(T t) {
        getSession().saveOrUpdate(t);
    }

    @Override
    public T getById(PK id) {
        return (T) getSession().get(entityClass, id);
    }

    @Override
    public void evict(T t) {
        if (t != null)
            getSession().evict(t);
    }

}