Relacionamento HIbernate comdados já cadastrados

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package persistencia.beans;

import java.io.Serializable;
import java.util.List;
import javax.persistence.Basic;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.OneToOne;
import javax.persistence.Table;
import persistencia.controle.BeanPersist;
/**
 *
 * @author eucasssio
 */
@Entity
@Table(name = "administrador")
@NamedQueries({@NamedQuery(name = "Administrador.findAll", query = "SELECT a FROM Administrador a"), @NamedQuery(name = "Administrador.findById", query = "SELECT a FROM Administrador a WHERE a.id = :id")})
public class Administrador implements Serializable,BeanPersist {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Basic(optional = false)
    @Column(name = "id")
    private Integer id;
    @OneToMany(cascade = CascadeType.ALL, mappedBy = "idAdmin")
    private List<Categoria> categorias;
    @OneToMany(cascade = CascadeType.ALL, mappedBy = "idAdmin")
    private List<Foto> fotos;
    @JoinColumn(name = "idNivelAcesso", referencedColumnName = "id")
    @OneToOne(optional = false,cascade = CascadeType.ALL)
    private NivelAcesso nivelAcesso;
    @JoinColumn(name = "idUsuario", referencedColumnName = "id")
    @OneToOne(optional = false,cascade = CascadeType.ALL)
    private Usuario usuario;

    public Administrador() {
    }

    public Administrador(Integer id) {
        this.id = id;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public NivelAcesso getNivelAcesso() {
        return nivelAcesso;
    }

    public Usuario getUsuario() {
        return usuario;
    }

    public List<Categoria> getCategorias() {
        return categorias;
    }

    public List<Foto> getFotos() {
        return fotos;
    }

  

    public List<Foto> getFotoCollection() {
        return fotos;
    }

    public void setFotoCollection(List<Foto> fotoCollection) {
        this.fotos = fotoCollection;
    }

    public NivelAcesso getIdNivelAcesso() {
        return nivelAcesso;
    }

    public void setIdNivelAcesso(NivelAcesso idNivelAcesso) {
        this.nivelAcesso = idNivelAcesso;
    }

    public Usuario getIdUsuario() {
        return usuario;
    }

    public void setIdUsuario(Usuario idUsuario) {
        this.usuario = idUsuario;
    }

    @Override
    public int hashCode() {
        int hash = 0;
        hash += (id != null ? id.hashCode() : 0);
        return hash;
    }

    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof Administrador)) {
            return false;
        }
        Administrador other = (Administrador) object;
        if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "persistencia.beans.Administrador[id=" + id + "]";
    }

}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package persistencia.beans;

import java.io.Serializable;
import javax.persistence.Basic;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import persistencia.controle.BeanPersist;

/**
 *
 * @author eucasssio
 */
@Entity
@Table(name = "nivelAcesso")
@NamedQueries({@NamedQuery(name = "NivelAcesso.findAll", query = "SELECT n FROM NivelAcesso n"), @NamedQuery(name = "NivelAcesso.findById", query = "SELECT n FROM NivelAcesso n WHERE n.id = :id"), @NamedQuery(name = "NivelAcesso.findByNivel", query = "SELECT n FROM NivelAcesso n WHERE n.nivel = :nivel")})
public class NivelAcesso implements Serializable,BeanPersist {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Basic(optional = false)
    @Column(name = "id")
    private Integer id;
    @Basic(optional = false)
    @Column(name = "nivel")
    @OneToMany(mappedBy = "nivelAcesso",fetch=FetchType.LAZY)
    private Integer nivel;

    public NivelAcesso() {
    }

    public NivelAcesso(Integer id) {
        this.id = id;
    }

    public NivelAcesso(Integer id, Integer nivel) {
        this.id = id;
        this.nivel = nivel;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public Integer getNivel() {
        return nivel;
    }

    public void setNivel(Integer nivel) {
        this.nivel = nivel;
    }


    @Override
    public int hashCode() {
        int hash = 0;
        hash += (id != null ? id.hashCode() : 0);
        return hash;
    }

    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof NivelAcesso)) {
            return false;
        }
        NivelAcesso other = (NivelAcesso) object;
        if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "persistencia.beans.NivelAcesso[id=" + id + "]"+'-'+nivel;
    }

   }