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Java > Open Source Codes > org > jfree > base > log > PadMessage


1 /* ========================================================================
2  * JCommon : a free general purpose class library for the Java(tm) platform
3  * ========================================================================
4  *
5  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
6  *
7  * Project Info: http://www.jfree.org/jcommon/index.html
8  *
9  * This library is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17  * License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22  * USA.
23  *
24  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25  * in the United States and other countries.]
26  *
27  * ---------------
28  * PadMessage.java
29  * ---------------
30  * (C) Copyright 2004, by Object Refinery Limited.
31  *
32  * Original Author: Thomas Morgner;
33  * Contributor(s): David Gilbert (for Object Refinery Limited);
34  *
35  * $Id: PadMessage.java,v 1.4 2005/10/18 13:14:33 mungady Exp $
36  *
37  * Changes
38  * -------
39  * 15-Jul-2004 : Added JCommon header (DG);
40  *
41  */
42
43 package org.jfree.base.log;
44
45 import java.util.Arrays JavaDoc;
46
47 /**
48  * A message object that pads the output if the text is shorter than
49  * the given length. This is usefull when concating multiple messages,
50  * which should appear in a table like style.
51  *
52  * @author Thomas Morgner
53  */
54 public class PadMessage {
55
56     /**
57      * The message.
58      */
59     private final Object JavaDoc text;
60   
61     /**
62      * The padding size.
63      */
64     private final int length;
65
66     /**
67      * Creates a new message.
68      *
69      * @param message the message.
70      * @param length the padding size.
71      */
72     public PadMessage(final Object JavaDoc message, final int length) {
73         this.text = message;
74         this.length = length;
75     }
76
77     /**
78      * Returns a string representation of the message.
79      *
80      * @return the string.
81      */
82     public String JavaDoc toString() {
83         final StringBuffer JavaDoc b = new StringBuffer JavaDoc();
84         b.append(this.text);
85         if (b.length() < this.length) {
86             final char[] pad = new char[this.length - b.length()];
87             Arrays.fill(pad, ' ');
88             b.append(pad);
89         }
90         return b.toString();
91     }
92     
93 }
94
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