| 1 | /** |
| 2 | * Copyright (C) 2006 NetMind Consulting Bt. |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 3 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * This library is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with this library; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | */ |
| 18 | |
| 19 | package hu.netmind.beankeeper.serial; |
| 20 | |
| 21 | import java.io.Serializable; |
| 22 | import java.util.Date; |
| 23 | import java.util.Calendar; |
| 24 | |
| 25 | /** |
| 26 | * A serial number is a unique number based on time, but it is |
| 27 | * <strong>not</strong> completely based on time. It has two parts, |
| 28 | * one defines the millisecond the serial was created in, and the other |
| 29 | * is a sub-millisecond index that makes it possible to have at |
| 30 | * maximum 10.000 distinct serials in every given millisecond. |
| 31 | * @author Brautigam Robert |
| 32 | * @version Revision: $Revision$ |
| 33 | */ |
| 34 | public class Serial implements Serializable |
| 35 | { |
| 36 | private Long serial; |
| 37 | |
| 38 | /** |
| 39 | * Construct a serial with it's value. |
| 40 | */ |
| 41 | public Serial(Long serial) |
| 42 | { |
| 43 | this.serial=serial; |
| 44 | } |
| 45 | |
| 46 | /** |
| 47 | * Get the serial value. |
| 48 | */ |
| 49 | public Long getValue() |
| 50 | { |
| 51 | return serial; |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Get the first serial that is created on |
| 56 | * the given date. |
| 57 | */ |
| 58 | public static Serial getSerial(Date date) |
| 59 | { |
| 60 | return new Serial(date.getTime()*10000L); |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Get the millisecond this serial was created on. |
| 65 | */ |
| 66 | public Date getDate() |
| 67 | { |
| 68 | return new Date(serial/10000L+1); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Get the maximal serial value possible. |
| 73 | */ |
| 74 | public static Serial getMaxSerial() |
| 75 | { |
| 76 | return new Serial(Long.MAX_VALUE); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | |