001: /*
002: * $Id: PdfIndirectReference.java 2057 2005-11-29 21:05:22Z blowagie $
003: * $Name$
004: *
005: * Copyright 1999, 2000, 2001, 2002 Bruno Lowagie
006: *
007: * The contents of this file are subject to the Mozilla Public License Version 1.1
008: * (the "License"); you may not use this file except in compliance with the License.
009: * You may obtain a copy of the License at http://www.mozilla.org/MPL/
010: *
011: * Software distributed under the License is distributed on an "AS IS" basis,
012: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
013: * for the specific language governing rights and limitations under the License.
014: *
015: * The Original Code is 'iText, a free JAVA-PDF library'.
016: *
017: * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
018: * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
019: * All Rights Reserved.
020: * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
021: * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
022: *
023: * Contributor(s): all the names of the contributors are added in the source code
024: * where applicable.
025: *
026: * Alternatively, the contents of this file may be used under the terms of the
027: * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
028: * provisions of LGPL are applicable instead of those above. If you wish to
029: * allow use of your version of this file only under the terms of the LGPL
030: * License and not to allow others to use your version of this file under
031: * the MPL, indicate your decision by deleting the provisions above and
032: * replace them with the notice and other provisions required by the LGPL.
033: * If you do not delete the provisions above, a recipient may use your version
034: * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
035: *
036: * This library is free software; you can redistribute it and/or modify it
037: * under the terms of the MPL as stated above or under the terms of the GNU
038: * Library General Public License as published by the Free Software Foundation;
039: * either version 2 of the License, or any later version.
040: *
041: * This library is distributed in the hope that it will be useful, but WITHOUT
042: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
043: * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
044: * details.
045: *
046: * If you didn't download this code from the following link, you should check if
047: * you aren't using an obsolete version:
048: * http://www.lowagie.com/iText/
049: */
050:
051: package com.lowagie.text.pdf;
052:
053: /**
054: * <CODE>PdfIndirectReference</CODE> contains a reference to a <CODE>PdfIndirectObject</CODE>.
055: * <P>
056: * Any object used as an element of an array or as a value in a dictionary may be specified
057: * by either a direct object of an indirect reference. An <I>indirect reference</I> is a reference
058: * to an indirect object, and consists of the indirect object's object number, generation number
059: * and the <B>R</B> keyword.<BR>
060: * This object is described in the 'Portable Document Format Reference Manual version 1.3'
061: * section 4.11 (page 54).
062: *
063: * @see PdfObject
064: * @see PdfIndirectObject
065: */
066:
067: public class PdfIndirectReference extends PdfObject {
068:
069: // membervariables
070:
071: /** the object number */
072: protected int number;
073:
074: /** the generation number */
075: protected int generation = 0;
076:
077: // constructors
078:
079: protected PdfIndirectReference() {
080: super (0);
081: }
082:
083: /**
084: * Constructs a <CODE>PdfIndirectReference</CODE>.
085: *
086: * @param type the type of the <CODE>PdfObject</CODE> that is referenced to
087: * @param number the object number.
088: * @param generation the generation number.
089: */
090:
091: PdfIndirectReference(int type, int number, int generation) {
092: super (0, new StringBuffer().append(number).append(" ").append(
093: generation).append(" R").toString());
094: this .number = number;
095: this .generation = generation;
096: }
097:
098: /**
099: * Constructs a <CODE>PdfIndirectReference</CODE>.
100: *
101: * @param type the type of the <CODE>PdfObject</CODE> that is referenced to
102: * @param number the object number.
103: */
104:
105: PdfIndirectReference(int type, int number) {
106: this (type, number, 0);
107: }
108:
109: // methods
110:
111: /**
112: * Returns the number of the object.
113: *
114: * @return a number.
115: */
116:
117: public int getNumber() {
118: return number;
119: }
120:
121: /**
122: * Returns the generation of the object.
123: *
124: * @return a number.
125: */
126:
127: public int getGeneration() {
128: return generation;
129: }
130:
131: public String toString() {
132: return new StringBuffer().append(number).append(" ").append(
133: generation).append(" R").toString();
134: }
135: }
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