EmailSupervisor.java

/*
 * YAQP - Yet Another QSAR Project: Machine Learning algorithms designed for
 * the prediction of toxicological features of chemical compounds become
 * available on the Web. Yaqp is developed under OpenTox (http://opentox.org)
 * which is an FP7-funded EU research project.
 *
 * Copyright (C) 2009-2010 Pantelis Sopasakis & Charalampos Chomenides
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */
package org.opentox.db.util;

/**
 *
 * <p>Checks the integrity of a provided email address. Checks if the email address
 * is non-empty, contains special characters, complies with the general structure
 * <code>username@mailserver.ext</code> or <code>username@mailserver.subdomain.ext</code>,
 * and checks whether the given email ends with a non-acceptable character.
 * Other tests might be also added in the future for better email-checking.
 * in the future.</p>
 *
 * @author Pantelis Sopasakis
 * @author Charalampos Chomenides
 */
public class EmailSupervisor {

    /**
     * Inacceptable characters in an email address
     */
    private static String[] inacceptable = new String[]{
        "~", "`", "!", "#", "$", "%",
        "^", "&", "*", "(", ")", "-",
        "+", "=", "{", "[", "]", "}",
        "|", "\\", "\"", "\'", ";", ":",
        ",", "?", "/"
    };

    /**
     * <p>Static methods to check the integrity of a given email address.</p>
     * 
     * <p><b>Copied here from EmailSupervisor :</b>
     * Checks the integrity of a provided email address. Checks if the email address
     * is non-empty, contains special characters, complies with the general structure
     * <code>username@mailserver.ext</code> or <code>username@mailserver.subdomain.ext</code>,
     * and checks whether the given email ends with a dot. Other tests might be also added
     * in the future.</p>
     * @param email given email address
     * @return <code>true</code> if the email address is valid, <code>false</code>
     * otherwise.
     * @see EmailSupervisor
     */
    public static boolean checkMail(String email) {

        for (int i = 0; i < inacceptable.length; i++) {
            if (email.contains(inacceptable[i])) {
                return false;
            }
        }

        String[] parts = email.split("@");
        if (parts.length != 2) {
            return false;
        } else {
            if (!parts[1].contains(".")) {
                return false;
            }

            if (parts[1].endsWith(".")||parts[1].endsWith("_")) {
                return false;
            }

            if (parts[0].equalsIgnoreCase("") || parts[0] == null) {
                return false;
            }

        }
        return true;
    }
}