dao.parent.Dao.java Source code

Introduction

Here is the source code for dao.parent.Dao.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 dao.parent;

import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Criterion;
import org.hibernate.criterion.Restrictions;
import org.springframework.beans.factory.annotation.Autowired;

/**
 *
 * @author 
 */
public abstract class Dao<T> {

    @Autowired
    private SessionFactory sessionFactory;

    public abstract Class getSupportedClass();

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

    public void deleteObj(final T obj) {
        getCurrentSession().delete(obj);
    }

    public void save(T obj) {
        getCurrentSession().save(obj);
    }

    public void update(T obj) {
        getCurrentSession().merge(obj);
    }

    public List<T> getAll() {
        Criteria cr = getCurrentSession().createCriteria(getSupportedClass());
        cr.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
        return cr.list();
    }

    public void delete(T obj) {
        getCurrentSession().delete(obj);
    }

    public T find(Long id) {
        return (T) getCurrentSession().get(getSupportedClass(), id);
    }

    protected Criteria getCriteriaDistinctRoot(Class cl) {
        Criteria crit = getCurrentSession().createCriteria(cl);
        crit.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
        return crit;
    }

    protected Criterion nullOrFalse(String fieldName) {
        return Restrictions.or(Restrictions.isNull(fieldName), Restrictions.eq(fieldName, false));
    }

}