dao.DAOPeticionAmistad.java Source code

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Here is the source code for dao.DAOPeticionAmistad.java

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/*
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package dao;

import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import modelo.PeticionAmistad;
import modelo.Usuario;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

/**
 *
 * @author Daniel
 */
@Repository
@Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
public class DAOPeticionAmistad {
    @PersistenceContext
    EntityManager em;

    /**
     * 
     */
    public DAOPeticionAmistad() {
    }

    /**
     * 
     * @param _peticion 
     */
    @Transactional(propagation = Propagation.REQUIRED, readOnly = false, rollbackFor = exceptionsDAO.GuardarPeticionAmistadException.class)
    public void guardarPeticionAmistad(PeticionAmistad _peticion) {
        em.persist(_peticion);
    }

    /**
     * 
     * @param _peticion 
     */
    @Transactional(propagation = Propagation.REQUIRED, readOnly = false, rollbackFor = exceptionsDAO.ActualizarPeticionAmistadException.class)
    public void actualizarPeticionAmistad(PeticionAmistad _peticion) {
        em.merge(_peticion);
    }

    /**
     * 
     * @param _peticion 
     */
    @Transactional(propagation = Propagation.REQUIRED, readOnly = false, rollbackFor = exceptionsDAO.BorrarPeticionAmistadException.class)
    public void borrarPeticionAmistad(PeticionAmistad _peticion) {
        em.remove(em.merge(_peticion));
    }

    /**
     * 
     * @param _id_peticion
     * @return 
     */
    public PeticionAmistad obtenerPeticionAmistad(Integer _id_peticion) {
        return em.find(PeticionAmistad.class, _id_peticion);
    }

    /**
     * 
     * @param _emisor
     * @param _receptor
     * @return comprueba si existe peticion de amistad en la base de datos
     */
    public boolean comprobarPeticionAmistad(Usuario _emisor, Usuario _receptor) {
        return em.createQuery("SELECT P FROM PeticionAmistad P WHERE P.emisor = ?1 AND P.receptor = ?2")
                .setParameter(1, _emisor).setParameter(2, _receptor).getResultList().isEmpty();
    }
}