com.itextpdf.text.factories.GreekAlphabetFactory Maven / Gradle / Ivy
/*
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* This file is part of the iText (R) project.
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* Authors: Bruno Lowagie, Paulo Soares, et al.
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package com.itextpdf.text.factories;
import com.itextpdf.text.SpecialSymbol;
/**
* This class can produce String combinations representing a number built with
* Greek letters (from alpha to omega, then alpha alpha, alpha beta, alpha gamma).
* We are aware of the fact that the original Greek numbering is different;
* See http://www.cogsci.indiana.edu/farg/harry/lan/grknum.htm#ancient
* but this isn't implemented yet; the main reason being the fact that we
* need a font that has the obsolete Greek characters qoppa and sampi.
*
* @since 2.0.7 (was called GreekNumberFactory in earlier versions)
*/
public class GreekAlphabetFactory {
/**
* Changes an int into a lower case Greek letter combination.
* @param index the original number
* @return the letter combination
*/
public static final String getString(final int index) {
return getString(index, true);
}
/**
* Changes an int into a lower case Greek letter combination.
* @param index the original number
* @return the letter combination
*/
public static final String getLowerCaseString(final int index) {
return getString(index);
}
/**
* Changes an int into a upper case Greek letter combination.
* @param index the original number
* @return the letter combination
*/
public static final String getUpperCaseString(final int index) {
return getString(index).toUpperCase();
}
/**
* Changes an int into a Greek letter combination.
* @param index the original number
* @param lowercase set to lowercase
* @return the letter combination
*/
public static final String getString(int index, final boolean lowercase) {
if (index < 1) return "";
index--;
int bytes = 1;
int start = 0;
int symbols = 24;
while(index >= symbols + start) {
bytes++;
start += symbols;
symbols *= 24;
}
int c = index - start;
char[] value = new char[bytes];
while(bytes > 0) {
bytes--;
value[bytes] = (char)(c % 24);
if (value[bytes] > 16) value[bytes]++;
value[bytes] += (lowercase ? 945 : 913);
value[bytes] = SpecialSymbol.getCorrespondingSymbol(value[bytes]);
c /= 24;
}
return String.valueOf(value);
}
}