fakedatamaker.contact.online.FakeEmailFactory.java Source code

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Here is the source code for fakedatamaker.contact.online.FakeEmailFactory.java

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/*
 *  Copyright 2012 Brian R Lee
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package fakedatamaker.contact.online;

import java.util.Random;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang3.RandomStringUtils;
import org.apache.commons.lang3.StringUtils;

public class FakeEmailFactory {

    public static final String[] commonDomains = { "yahoo.com", "gmail.com", "aol.com", "aim.com", "msn.com",
            "comcast.net", "att.com", "verizon.net", "facebook.com" };

    private static Random generator = new Random();

    private static final String DOMAIN_REGEX = "/^([a-z0-9]([-a-z0-9]*[a-z0-9])?\\.)+((a[cdefgilmnoqrstuwxz]|aero|arpa)|(b[abdefghijmnorstvwyz]|biz)|(c[acdfghiklmnorsuvxyz]|cat|com|coop)|d[ejkmoz]|(e[ceghrstu]|edu)|f[ijkmor]|(g[abdefghilmnpqrstuwy]|gov)|h[kmnrtu]|(i[delmnoqrst]|info|int)|(j[emop]|jobs)|k[eghimnprwyz]|l[abcikrstuvy]|(m[acdghklmnopqrstuvwxyz]|mil|mobi|museum)|(n[acefgilopruz]|name|net)|(om|org)|(p[aefghklmnrstwy]|pro)|qa|r[eouw]|s[abcdeghijklmnortvyz]|(t[cdfghjklmnoprtvwz]|travel)|u[agkmsyz]|v[aceginu]|w[fs]|y[etu]|z[amw])$/i";
    private static Pattern pattern = Pattern.compile(DOMAIN_REGEX);

    private FakeEmailFactory() {

    }

    /**
     * Generates an email. More strict than the true email standard. No special
     * characters such as the + (plus) sign.
     */
    public static String makeEmail() {
        return String.format("%s@%s", RandomStringUtils.randomAlphabetic(8).toLowerCase(), makeDomain());
    }

    /**
     * Generates an email, with a given domain name.
     * 
     * @param domain
     * @return
     * @throws Exception
     */
    public static String makeEmail(String domain) throws Exception {
        if (!isDomainValid(domain)) {
            throw new Exception("Your domain is invalid.");
        }

        return String.format("%s@%s", RandomStringUtils.randomAlphabetic(8), domain);
    }

    /**
     * Creates an email based on a first and last name.
     * 
     * @param firstName The person's first name.
     * @param lastName The person's last name.
     * @return A String
     * @throws Exception
     */
    public static String makeEmail(String firstName, String lastName) throws Exception {
        if (StringUtils.isEmpty(firstName)) {
            throw new Exception("Your firstName is empty.");
        }

        if (StringUtils.isEmpty(lastName)) {
            throw new Exception("Your lastName is empty.");
        }

        return String.format("%s.%s@%s", firstName, lastName, makeDomain());
    }

    /**
     * Creates an email based on a first and last name.
     * 
     * @param firstName The person's first name.
     * @param lastName The person's last name.
     * @param domain
     * @return
     * @throws Exception
     */
    public static String makeEmail(String firstName, String lastName, String domain) throws Exception {
        if (!isDomainValid(domain)) {
            throw new Exception("Your domain is invalid.");
        }

        if (StringUtils.isEmpty(firstName)) {
            throw new Exception("Your firstName is empty.");
        }

        if (StringUtils.isEmpty(lastName)) {
            throw new Exception("Your lastName is empty.");
        }

        return String.format("%s.%s@%s", firstName, lastName, domain);
    }

    /**
     * 
     * @param domain
     * @return
     */
    public static boolean isDomainValid(String domain) {
        Matcher matcher = pattern.matcher(domain);
        return matcher.matches();
    }

    /**
     * 
     * @return
     */
    public static String makeDomain() {
        int rnd = generator.nextInt(commonDomains.length);
        return commonDomains[rnd];
    }
}