D-Net

package eu.dnetlib.goldoa.service.dao;

import org.hibernate.Criteria;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.springframework.beans.factory.annotation.Autowired;

import java.io.Serializable;

import java.lang.reflect.ParameterizedType;

public abstract class AbstractDao<PK extends Serializable, T> {

	@Autowired

    private SessionFactory sessionFactory;

    private final Class<T> persistentClass;

    @SuppressWarnings("unchecked")

    public AbstractDao(){

        this.persistentClass =(Class<T>) ((ParameterizedType) this.getClass().getGenericSuperclass()).getActualTypeArguments()[1];

    }

    public Session getSession(){

        return sessionFactory.getCurrentSession();

    }

    @SuppressWarnings("unchecked")

    public T getByKey(PK key) {

        return (T) getSession().get(persistentClass, key);

    }

    public void persist(T entity) {

        getSession().persist(entity);

    }

    public void delete(T entity) {

        getSession().delete(entity);

    }

    protected Criteria createEntityCriteria(){

        return getSession().createCriteria(persistentClass);

    }

}