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Java > Open Source Codes > org > pdfbox > Version


1 /**
2  * Copyright (c) 2005, www.pdfbox.org
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright notice,
9  * this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright notice,
11  * this list of conditions and the following disclaimer in the documentation
12  * and/or other materials provided with the distribution.
13  * 3. Neither the name of pdfbox; nor the names of its
14  * contributors may be used to endorse or promote products derived from this
15  * software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20  * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  *
28  * http://www.pdfbox.org
29  *
30  */
31 package org.pdfbox;
32
33 import java.io.IOException JavaDoc;
34
35 import java.util.Properties JavaDoc;
36
37 import org.pdfbox.util.ResourceLoader;
38
39
40 /**
41  * A simple command line utility to get the version of PDFBox.
42  *
43  * @author <a HREF="ben@benlitchfield.com">Ben Litchfield</a>
44  * @version $Revision: 1.4 $
45  */
46 public class Version
47 {
48     private static final String JavaDoc PDFBOX_VERSION_PROPERTIES = "Resources/pdfbox.version";
49     
50     private Version()
51     {
52         //should not be constructed.
53 }
54     
55     /**
56      * Get the version of PDFBox or unknown if it is not known.
57      *
58      * @return The version of pdfbox that is being used.
59      */
60     public static String JavaDoc getVersion()
61     {
62         String JavaDoc version = "unknown";
63         try
64         {
65             Properties JavaDoc props = ResourceLoader.loadProperties( PDFBOX_VERSION_PROPERTIES );
66             version = props.getProperty( "pdfbox.version", version );
67         }
68         catch( IOException JavaDoc io )
69         {
70             //if there is a problem loading the properties then don't throw an
71 //exception, 'unknown' will be returned instead.
72 io.printStackTrace();
73         }
74         return version;
75     }
76
77     /**
78      * This will print out the version of PDF to System.out.
79      *
80      * @param args Command line arguments.
81      */
82     public static void main(String JavaDoc[] args)
83     {
84         if( args.length != 0 )
85         {
86             usage();
87             return;
88         }
89         System.out.println( "Version:" + getVersion() );
90     }
91
92     /**
93      * This will print out a message telling how to use this example.
94      */
95     private static void usage()
96     {
97         System.err.println( "usage: " + Version.class.getName() );
98     }
99     
100 }
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