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Java > Open Source Codes > com > lowagie > text > pdf > PdfNumber


1 /*
2  * $Id: PdfNumber.java 2739 2007-05-04 11:24:51Z blowagie $
3  * $Name$
4  *
5  * Copyright 1999, 2000, 2001, 2002 Bruno Lowagie
6  *
7  * The contents of this file are subject to the Mozilla Public License Version 1.1
8  * (the "License"); you may not use this file except in compliance with the License.
9  * You may obtain a copy of the License at http://www.mozilla.org/MPL/
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the License.
14  *
15  * The Original Code is 'iText, a free JAVA-PDF library'.
16  *
17  * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
18  * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
19  * All Rights Reserved.
20  * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
21  * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
22  *
23  * Contributor(s): all the names of the contributors are added in the source code
24  * where applicable.
25  *
26  * Alternatively, the contents of this file may be used under the terms of the
27  * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
28  * provisions of LGPL are applicable instead of those above. If you wish to
29  * allow use of your version of this file only under the terms of the LGPL
30  * License and not to allow others to use your version of this file under
31  * the MPL, indicate your decision by deleting the provisions above and
32  * replace them with the notice and other provisions required by the LGPL.
33  * If you do not delete the provisions above, a recipient may use your version
34  * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
35  *
36  * This library is free software; you can redistribute it and/or modify it
37  * under the terms of the MPL as stated above or under the terms of the GNU
38  * Library General Public License as published by the Free Software Foundation;
39  * either version 2 of the License, or any later version.
40  *
41  * This library is distributed in the hope that it will be useful, but WITHOUT
42  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
43  * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
44  * details.
45  *
46  * If you didn't download this code from the following link, you should check if
47  * you aren't using an obsolete version:
48  * http://www.lowagie.com/iText/
49  */
50
51 package com.lowagie.text.pdf;
52
53 /**
54  * <CODE>PdfNumber</CODE> provides two types of numbers, integer and real.
55  * <P>
56  * Integers may be specified by signed or unsigned constants. Reals may only be
57  * in decimal format.<BR>
58  * This object is described in the 'Portable Document Format Reference Manual version 1.7'
59  * section 3.3.2 (page 52-53).
60  *
61  * @see PdfObject
62  * @see BadPdfFormatException
63  */
64
65 public class PdfNumber extends PdfObject {
66     
67 /** actual value of this <CODE>PdfNumber</CODE>, represented as a <CODE>double</CODE> */
68     private double value;
69     
70     // constructors
71
72 /**
73  * Constructs a <CODE>PdfNumber</CODE>-object.
74  *
75  * @param content value of the new <CODE>PdfNumber</CODE>-object
76  */
77     
78     public PdfNumber(String JavaDoc content) {
79         super(NUMBER);
80         try {
81             value = Double.parseDouble(content.trim());
82             setContent(content);
83         }
84         catch (NumberFormatException JavaDoc nfe){
85             throw new RuntimeException JavaDoc(content + " is not a valid number - " + nfe.toString());
86         }
87     }
88     
89 /**
90  * Constructs a new INTEGER <CODE>PdfNumber</CODE>-object.
91  *
92  * @param value value of the new <CODE>PdfNumber</CODE>-object
93  */
94     
95     public PdfNumber(int value) {
96         super(NUMBER);
97         this.value = value;
98         setContent(String.valueOf(value));
99     }
100     
101 /**
102  * Constructs a new REAL <CODE>PdfNumber</CODE>-object.
103  *
104  * @param value value of the new <CODE>PdfNumber</CODE>-object
105  */
106     
107     public PdfNumber(double value) {
108         super(NUMBER);
109         this.value = value;
110         setContent(ByteBuffer.formatDouble(value));
111     }
112     
113 /**
114  * Constructs a new REAL <CODE>PdfNumber</CODE>-object.
115  *
116  * @param value value of the new <CODE>PdfNumber</CODE>-object
117  */
118     
119     public PdfNumber(float value) {
120         this((double)value);
121     }
122     
123     // methods returning the value of this object
124
125 /**
126  * Returns the primitive <CODE>int</CODE> value of this object.
127  *
128  * @return a value
129  */
130     
131     public int intValue() {
132         return (int) value;
133     }
134     
135 /**
136  * Returns the primitive <CODE>double</CODE> value of this object.
137  *
138  * @return a value
139  */
140     
141     public double doubleValue() {
142         return value;
143     }
144     
145     public float floatValue() {
146         return (float)value;
147     }
148     
149     // other methods
150
151 /**
152  * Increments the value of the <CODE>PdfNumber</CODE>-object with 1.
153  */
154     
155     public void increment() {
156         value += 1.0;
157         setContent(ByteBuffer.formatDouble(value));
158     }
159 }
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