com.autentia.intra.validator.NifValidator.java Source code

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Here is the source code for com.autentia.intra.validator.NifValidator.java

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/* 
 *  TNTConcept Easy Enterprise Management by Autentia Real Bussiness Solution S.L.  
 *   Copyright (C) 2007 Autentia Real Bussiness Solution S.L.                  
 *   
 *    This program is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU General Public License
 *    as published by the Free Software Foundation; either version 2
 *    of the License, or (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *    Autentia Real Bussiness Solution S.L.
 *    Tlf: +34 91 675 33 06, +34 655 99 11 72
 *    Fax: +34 91 656 65 04
 *    info@autentia.com                                                
 */

package com.autentia.intra.validator;

import org.apache.commons.lang.StringUtils;

import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Validador de NIF
 *
 * @author AUTENTIA
 */
public class NifValidator implements Validator {
    /**
     * Efecta el proceso de validacin
     */
    public void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException {
        // Si el valor es null, lo transformamos en un valor vaco
        String valor = StringUtils.defaultString((String) value);
        // el valor debe tener 9 posiciones
        valor = valor.toUpperCase();
        // Las 8 primeras posiciones deben ser nmeros y la ltima una letra
        Pattern mask = Pattern.compile("[0-9]{8,8}[A-Z]");
        Matcher matcher = mask.matcher(valor);
        if (!matcher.matches())
            throw new ValidatorException(new FacesMessage("El componente " + component.getId()
                    + " no contiene un NIF vlido. Las 8 primeras posiciones deben ser numricas"));

        String dni = valor.substring(0, 8);
        String digitoControl = valor.substring(8, 9);
        // Calculamos la letra de control
        String letras = "TRWAGMYFPDXBNJZSQVHLCKE";
        int posicion_modulo = Integer.parseInt(dni) % 23;
        String digitoControlCalculado = letras.substring(posicion_modulo, posicion_modulo + 1);
        if (!digitoControl.equalsIgnoreCase(digitoControlCalculado))
            throw new ValidatorException(
                    new FacesMessage("El componente " + component.getId() + " no contiene un NIF vlido"));

    }
}