br.com.tpartner.persistence.crud.implementation.GenericCRUDImplementation.java Source code

Introduction

Here is the source code for br.com.tpartner.persistence.crud.implementation.GenericCRUDImplementation.java

Source

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package br.com.tpartner.persistence.crud.implementation;

import br.com.tpartner.persistence.crud.GenericCRUD;
import java.lang.reflect.ParameterizedType;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.criterion.Restrictions;
import org.springframework.beans.factory.annotation.Autowired;

/**
 *
 * @author sergio
 */
public abstract class GenericCRUDImplementation<T, ID> implements GenericCRUD<T, ID> {

    @Autowired
    private SessionFactory sessionFactory;

    public GenericCRUDImplementation() {
        persistentClass = (Class<T>) ((ParameterizedType) getClass().getGenericSuperclass())
                .getActualTypeArguments()[0];
    }

    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    public Session getCurrentSession() {
        return sessionFactory.openSession();
    }

    private Class<T> persistentClass;

    @Override
    public T save(T entity) {
        Session session = getCurrentSession();
        Transaction tx = session.beginTransaction();
        session.save(entity);
        tx.commit();
        session.close();
        return entity;
    }

    @Override
    public T update(T entity) {
        Session session = getCurrentSession();
        Transaction tx = session.beginTransaction();
        session.update(entity);
        tx.commit();
        session.close();
        return entity;
    }

    @Override
    public void delete(T entity) {
        Session session = getCurrentSession();
        Transaction tx = session.beginTransaction();
        session.delete(entity);
        tx.commit();
        session.close();
    }

    @Override
    public T findById(ID entityId) {
        Session session = getCurrentSession();
        Criteria createCriteria = session.createCriteria(persistentClass);
        createCriteria.add(Restrictions.eq("id", entityId));
        T entity = (T) createCriteria.uniqueResult();
        session.close();
        return entity;
    }

    @Override
    public List<T> findAll() {
        Session session = getCurrentSession();
        System.out.println(persistentClass);
        List<T> entities = session.createCriteria(persistentClass).list();
        session.close();
        return entities;
    }

}