Nihilist.java

import java.util.ArrayList;
import java.util.List;
import java.io.*;

public class Nihilist extends ClassicalCipher
{
// Conducts Nihilist encryption and decryption as described on p45 of
// D'Agapeyeff Codes and Ciphers.  Other variants exist.

/*
Copyright (C) 2019  S Combes

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
    
RegularKeyedColumnar kc;

Nihilist(String word) { this(new Codespace(Codespace.StockAlphabet.CAPITALS),word); }
// ----------------------------------------------------------------------
Nihilist(Codespace cs,String word)
{
super(cs);
this.kc=new RegularKeyedColumnar(word,"X");
}
// ----------------------------------------------------------------------
@Override
public String encode(String PT) { 
  return kc.encode(kc.encode(cs.flattenToPT(PT))); }
// ----------------------------------------------------------------------
@Override
public String decode(String CT) { 
 return kc.decode(kc.decode(cs.flattenToCT(CT))); }
// ----------------------------------------------------------------------
public static void main(String [] args)
{
String pt="REUNIONTOMORROWATTHREEPMBRINGARMSASWESHALLATTEMPTTOBOMBTHERAILWAYSTATIONCHIEFABCD"; 

Nihilist n=new Nihilist("SCHUVALOV"); // N.B. F=V ERROR IN BOOK

if (n.knownTest(pt,"OMPBOETTMWORATMROTMREBRHEPIATHILBERWTYSIOATANOEUNTRNIOSGAASNRMWLSHATEALTAHIBCCEFD")) System.out.println("PASS");
else System.out.println("******** FAIL ***********");
}
}