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/*
 *
 * This file is part of the iText (R) project.
 * Copyright (c) 1998-2016 iText Group NV
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
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 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
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 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
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 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
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 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
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 */
package com.itextpdf.text.pdf;

import java.io.IOException;
import java.io.OutputStream;

/**
 * PdfIndirectReference contains a reference to a PdfIndirectObject.
 * 

* Any object used as an element of an array or as a value in a dictionary may be specified * by either a direct object of an indirect reference. An indirect reference is a reference * to an indirect object, and consists of the indirect object's object number, generation number * and the R keyword.
* This object is described in the 'Portable Document Format Reference Manual version 1.3' * section 4.11 (page 54). * * @see PdfObject * @see PdfIndirectObject */ public class PdfIndirectReference extends PdfObject { // membervariables /** the object number */ protected int number; /** the generation number */ protected int generation = 0; // constructors protected PdfIndirectReference() { super(0); } /** * Constructs a PdfIndirectReference. * * @param type the type of the PdfObject that is referenced to * @param number the object number. * @param generation the generation number. */ PdfIndirectReference(int type, int number, int generation) { super(0, new StringBuffer().append(number).append(" ").append(generation).append(" R").toString()); this.number = number; this.generation = generation; } /** * Constructs a PdfIndirectReference. * * @param type the type of the PdfObject that is referenced to * @param number the object number. */ protected PdfIndirectReference(int type, int number) { this(type, number, 0); } // methods /** * Returns the number of the object. * * @return a number. */ public int getNumber() { return number; } /** * Returns the generation of the object. * * @return a number. */ public int getGeneration() { return generation; } public String toString() { return new StringBuffer().append(number).append(" ").append(generation).append(" R").toString(); } @Override public void toPdf(PdfWriter writer, OutputStream os) throws IOException { os.write(PdfEncodings.convertToBytes(toString(), null)); } }





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