es.udc.tfg_es.clubtriatlon.utils.dao.GenericDaoHibernate.java Source code

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Here is the source code for es.udc.tfg_es.clubtriatlon.utils.dao.GenericDaoHibernate.java

Source

package es.udc.tfg_es.clubtriatlon.utils.dao;
/* BSD License */

import java.io.Serializable;
import java.lang.reflect.ParameterizedType;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Projections;
import org.hibernate.criterion.Restrictions;
import org.springframework.beans.factory.annotation.Autowired;

import es.udc.tfg_es.clubtriatlon.utils.exceptions.InstanceNotFoundException;

public class GenericDaoHibernate<E, PK extends Serializable> implements GenericDao<E, PK> {

    private SessionFactory sessionFactory;

    private Class<E> entityClass;

    @SuppressWarnings("unchecked")
    public GenericDaoHibernate() {
        this.entityClass = (Class<E>) ((ParameterizedType) getClass().getGenericSuperclass())
                .getActualTypeArguments()[0];
    }

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

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

    public void save(E entity) {
        getSession().saveOrUpdate(entity);
    }

    public boolean exists(PK id) {
        return getSession().createCriteria(entityClass).add(Restrictions.idEq(id)).setProjection(Projections.id())
                .uniqueResult() != null;
    }

    @SuppressWarnings("unchecked")
    public E find(PK id) throws InstanceNotFoundException {
        E entity = (E) getSession().get(entityClass, id);
        if (entity == null) {
            throw new InstanceNotFoundException(id, entityClass.getName());
        }
        return entity;
    }

    public void remove(PK id) throws InstanceNotFoundException {
        getSession().delete(find(id));
    }

}