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/*
 * Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

/*
 * @(#)UniqueValue.java       1.6 02/03/27
 */



package com.sun.xml.messaging.saaj.packaging.mime.internet;


/**
 * This is a utility class that generates unique values. The generated
 * String contains only US-ASCII characters and hence is safe for use
 * in RFC822 headers. 

* * This is a package private class. * * @author John Mani * @author Max Spivak * @author Bill Shannon */ class UniqueValue { /** * A global part number. Access is not synchronized because the * value is only one part of the unique value and so doesn't need * to be accurate. */ private static int part = 0; /** * Get a unique value for use in a multipart boundary string. * * This implementation generates it by concatenating a global * part number, a newly created object's hashCode(), * and the current time (in milliseconds). */ public static String getUniqueBoundaryValue() { StringBuilder s = new StringBuilder(); // Unique string is ----=_Part__. s.append("----=_Part_").append(part++).append("_"). append(s.hashCode()).append('.'). append(System.currentTimeMillis()); return s.toString(); } }





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