1 package org.opentrafficsim.core.idgenerator;
2
3 import java.io.Serializable;
4
5 /**
6 * Generate names for any kind of object.
7 * <p>
8 * Copyright (c) 2013-2019 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
9 * BSD-style license. See <a href="http://opentrafficsim.org/docs/current/license.html">OpenTrafficSim License</a>.
10 * <p>
11 * @version $Revision$, $LastChangedDate$, by $Author$, initial version Mar 4, 2016 <br>
12 * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
13 */
14 public class IdGenerator implements Serializable
15 {
16 /** */
17 private static final long serialVersionUID = 1L;
18
19 /** All generated names start with this string. */
20 private final String baseName;
21
22 /** Number of the last generated id. */
23 private long last = 0;
24
25 /**
26 * Construct a new IdGenerator.
27 * @param baseName String; all generated names start with this string
28 */
29 public IdGenerator(final String baseName)
30 {
31 this.baseName = baseName;
32 }
33
34 /**
35 * Generate an id.
36 * @return String; the generated id
37 */
38 public final synchronized String nextId()
39 {
40 long number;
41 synchronized (this)
42 {
43 number = ++this.last;
44 }
45 return this.baseName + number;
46 }
47
48 /** {@inheritDoc} */
49 @Override
50 public final String toString()
51 {
52 return "IdGenerator [baseName=" + this.baseName + ", last=" + this.last + "]";
53 }
54
55 }