com.itextpdf.text.pdf.PdfIndirectReference Maven / Gradle / Ivy
/*
* $Id: fe9ac95258ecf8aac42c67d623cd9a1c3a77f194 $
*
* 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.
* You should have received a copy of the GNU Affero General Public License
* 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/
*
* 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.
*
* 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.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
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));
}
}