Não consigo excluir[resolvido]

package br.com.ses.modelo.bean;

import java.util.Date;

import java.util.Set;

import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;

import org.hibernate.annotations.Cascade;
import org.hibernate.annotations.CascadeType;

import br.com.ses.modelo.dao.HibernateDAO;
import br.com.ses.modelo.dao.InterfaceDAO;
import br.com.ses.util.FacesContextUtil;

@Entity(name="cnf_e")
public class CNF {
	private Long numero;
	private CFOp codFiscalOp;
	private Cliente cliente;
	private Date emissao;
	private Date entrada;
	private Double total;
	private String observacao;
	private Set<DNF> detalheNF;
	
	@Id
	public Long getNumero() {
		return numero;
	}
	
	public void setNumero(Long numero) {
		this.numero = numero;
	}
	
	@ManyToOne(fetch=FetchType.LAZY)
	@JoinColumn(name="cfop_codigo")
	public CFOp getCodFiscalOp() {
		return codFiscalOp;
	}
	
	public void setCodFiscalOp(CFOp codFiscalOp) {
		this.codFiscalOp = codFiscalOp;
	}
	
	@ManyToOne(fetch=FetchType.LAZY)
	@JoinColumn(name="fornecedor_codigo")
	public Cliente getCliente() {
		return cliente;
	}
	
	public void setCliente(Cliente cliente) {
		this.cliente = cliente;
	}
	
	public Date getEmissao() {
		return emissao;
	}
	
	public void setEmissao(Date emissao) {
		this.emissao = emissao;
	}
	
	public Date getEntrada() {
		return entrada;
	}
	
	public void setEntrada(Date entrada) {
		this.entrada = entrada;
	}
	
	public Double getTotal() {
		return total;
	}
	
	public void setTotal(Double total) {
		this.total = total;
	}
	
	public String getObservacao() {
		return observacao;
	}
	
	public void setObservacao(String observacao) {
		this.observacao = observacao;
	}

	@OneToMany(fetch=FetchType.LAZY, mappedBy="cnf")
	@Cascade(value={CascadeType.SAVE_UPDATE})
	@JoinColumn(name="cnfe_numero", insertable=true, updatable=true)
	public Set<DNF> getDetalheNF() {
		return detalheNF;
	}

	public void setDetalheNF(Set<DNF> detalheNF) {
		this.detalheNF = detalheNF;
	}
	
	public String alteraCliente(){
		InterfaceDAO<Cliente> clienteDAO = new HibernateDAO<Cliente>(Cliente.class, FacesContextUtil.getRequestSession());
		clienteDAO.atualizar(cliente);
						
		return "altClisucesso";
	}
	
	public String excluiCliente(){
		try{
		System.out.println(">>>Metodo acessado!");
		InterfaceDAO<Cliente> clienteDAO = new HibernateDAO<Cliente>(Cliente.class, FacesContextUtil.getRequestSession());
		clienteDAO.excluir(cliente);
		}catch(Exception ex){
			ex.printStackTrace();
		}
		return "exClisucesso";
	}
}

package br.com.ses.modelo.dao;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.criterion.Example;
import org.hibernate.criterion.MatchMode;
import org.hibernate.criterion.Restrictions;

import br.com.ses.util.HibernateUtil;

public class HibernateDAO<T> implements InterfaceDAO<T> {
	
	private Class<T> classe;
	protected Session session;

	public HibernateDAO(Class<T> classe, Session session) {
		super();
		this.classe = classe;
		this.session = session;
	}

	@Override
	public void salvar(T bean) {
		session.save(bean);
	}

	@Override
	public void atualizar(T bean) {
		session.update(bean);
	}

	@Override
	public void excluir(T bean) {
		session.delete(bean);
	}

	@Override
	public T getBean(Serializable codigo) {
		T bean = (T) session.get(classe, codigo);
		return bean;
	}

	@Override
	public List<T> getBeans() {
		Criteria crit = session.createCriteria(classe);
		crit.setCacheable(true);
		Long inicio = System.currentTimeMillis();
		List<T> beans = (List<T>) crit.list();
		Long fim = System.currentTimeMillis();
		System.out.println(">>>Tempo total: "+(fim-inicio)+" milisegundos");
		System.out.println(HibernateUtil.getSessionfactory().getStatistics());
		return beans;
	}

	@Override
	public List<T> getBeansByExample(T bean) {
		Example example = getExample(bean);
		return session.createCriteria(classe).add(example).list();
	}
	
	protected Example getExample(T bean){
		Example example = Example.create(bean);
		example.enableLike(MatchMode.START);
		example.ignoreCase();
		example.excludeZeroes();
		return example;
	}

	@Override
	public List<T> getBeansByIds(String atributo, List<Serializable> codigos) {
		try{
			if(codigos.size() == 1){
				List<T> resultado = new ArrayList<T>();
				resultado.add(getBean(codigos.get(0)));
				return resultado;
			}else if(codigos.size() > 1){
				Criteria crit = session.createCriteria(classe);
				crit.add(Restrictions.in("codigo", codigos));
				return crit.list();
			}	
		}catch(Exception e){
			e.printStackTrace();
		}
		return new ArrayList<T>();
	}

	@Override
	public void atualizar(Collection<T> beans) {
		Iterator<T> it = beans.iterator();
		int i = 0;
		while(it.hasNext()){
			session.update(it.next());
			if(i % 20 == 0 || i >= beans.size() - 1){
				session.flush();
				session.clear();
			}
			i++;
		}//fim do laço while
		
	}

}

package br.com.ses.modelo.dao;

import java.io.Serializable;
import java.util.Collection;
import java.util.List;

public interface InterfaceDAO<T> {
	void salvar (T bean);
	void atualizar (T bean);
	void excluir (T bean);
	void atualizar(Collection<T> beans);
	T getBean(Serializable codigo);
	List<T> getBeans();
	List<T> getBeansByExample(T bean);
	List<T> getBeansByIds(String atributo, List<Serializable> codigos);
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN" 
	"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
	<class name="br.com.ses.modelo.bean.Cliente" table="clientes">
		<id name="codigo">
			<generator class="native"></generator>
		</id>
		<property name="nome"></property>
		<property name="endereco"></property>
		<property name="complemento"></property>
		<property name="bairro"></property>
		<property name="cidade"></property>
		<property name="uf"></property>
		<property name="cep"></property>
		<property name="datanasc"></property>
		<property name="desde"></property>
		<property name="rg"></property>
		<property name="cpf"></property>
		<property name="cnpj"></property>
		<property name="insest"></property>
		<property name="foneres"></property>
		<property name="fonecom"></property>
		<property name="fax"></property>
		<property name="celular"></property>
		<property name="contato"></property>
		<property name="observacao"></property>
		<bag name="produtos" table="produtos" inverse="true" lazy="false" fetch="select">
			<key column="fornecedor_codigo"></key>
			<one-to-many class="br.com.ses.modelo.bean.Produto"/>
		</bag>
	</class>
</hibernate-mapping>

public String excluiCliente(){
		try{
		System.out.println(">>>Metodo acessado!");
		InterfaceDAO<Cliente> clienteDAO = new HibernateDAO<Cliente>(Cliente.class, FacesContextUtil.getRequestSession());
		List<Cliente> clientes = clienteDAO.getBeansByExample(cliente);
		for(Cliente cliente:clientes){
		clienteDAO.excluir(cliente);
		}
		}catch(Exception ex){
			ex.printStackTrace();
		}
		return "exClisucesso";
	}

@ManyToOne(fetch=FetchType.LAZY)
	@JoinColumn(name="fornecedor_codigo")
	public Cliente getCliente() {
		return cliente;
	}

@ManyToOne(fetch=FetchType.LAZY)
	@JoinColumn(name="fornecedor_codigo")
	@Cascade(value={CascadeType.SAVE_UPDATE})
	public Cliente getCliente() {
		return cliente;
	}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN" 
	"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
	<class name="br.com.ses.modelo.bean.Cliente" table="clientes">
		<id name="codigo">
			<generator class="native"></generator>
		</id>
		<property name="nome"></property>
		<property name="endereco"></property>
		<property name="complemento"></property>
		<property name="bairro"></property>
		<property name="cidade"></property>
		<property name="uf"></property>
		<property name="cep"></property>
		<property name="datanasc"></property>
		<property name="desde"></property>
		<property name="rg"></property>
		<property name="cpf"></property>
		<property name="cnpj"></property>
		<property name="insest"></property>
		<property name="foneres"></property>
		<property name="fonecom"></property>
		<property name="fax"></property>
		<property name="celular"></property>
		<property name="contato"></property>
		<property name="observacao"></property>
		<bag name="produtos" table="produtos" inverse="true" lazy="false" fetch="select">
			<key column="fornecedor_codigo"></key>
			<one-to-many class="br.com.ses.modelo.bean.Produto"/>
		</bag>
	</class>
</hibernate-mapping>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN" 
	"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
	<class name="br.com.ses.modelo.bean.Cliente" table="clientes">
		<id name="codigo">
			<generator class="native"></generator>
		</id>
		<property name="nome"></property>
		<property name="endereco"></property>
		<property name="complemento"></property>
		<property name="bairro"></property>
		<property name="cidade"></property>
		<property name="uf"></property>
		<property name="cep"></property>
		<property name="datanasc"></property>
		<property name="desde"></property>
		<property name="rg"></property>
		<property name="cpf"></property>
		<property name="cnpj"></property>
		<property name="insest"></property>
		<property name="foneres"></property>
		<property name="fonecom"></property>
		<property name="fax"></property>
		<property name="celular"></property>
		<property name="contato"></property>
		<property name="observacao"></property>
		<bag name="produtos" table="produtos" inverse="true" lazy="false" fetch="select" cascade="all">
			<key column="fornecedor_codigo"></key>
			<one-to-many class="br.com.ses.modelo.bean.Produto"/>
		</bag>
	</class>
</hibernate-mapping>