Password.java

/* Copyright (c) 2012-2014, terrestris GmbH & Co. KG
 * All rights reserved.
 *
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 *    and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * (This is the BSD 3-Clause, sometimes called 'BSD New' or 'BSD Simplified',
 * see http://opensource.org/licenses/BSD-3-Clause)
 */
package de.terrestris.shogun.util;

import java.util.Random;

/**
 * Helper class for password related issues
 *
 * @author terrestris GmbH & Co. KG
 */
public class Password {

	/**
	 * A set of characters to build passwords
	 */
	private static final String PW_CHARSET = "_!0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

	/**
	 * Helper method to create a random password
	 *
	 * @param length the length of the password
	 * @return the new password
	 */
	public static String getRandomPassword(int length) {

		Random rand = new Random(System.currentTimeMillis());
		StringBuffer sb = new StringBuffer();
		for (int i = 0; i < length; i++) {
			int pos = rand.nextInt(PW_CHARSET.length());
			sb.append(PW_CHARSET.charAt(pos));
		}
		return sb.toString();
	}
}