com.itextpdf.text.pdf.PdfIndirectReference Maven / Gradle / Ivy
/*
*
* 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
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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));
}
}