package de.vanitasvitae.enigmandroid.enigma.inputPreparer; /** * Preparer class that prepares input text to only consist of [A..Z] * Copyright (C) 2015 Paul Schaub 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 2 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * @author vanitasvitae */ public abstract class InputPreparer { /** * Prepare the input String in a way that it only contains letters from [A..Z]. * Replace special characters, remove spaces and spell numbers. * @param input String * @return prepared String */ public String prepareString(String input) { input = input.toUpperCase(); input = input.replace("Ä","AE").replace("Ö","OE").replace("Ü","UE").replace("ß","SS"); String output = ""; for (char x : input.toCharArray()) { if (x >= 65 && x <= 90) //x in [A..Z] { output = output + x; } else if (x >= 48 && x <= 57) //x in [0..9] { output = output + replaceNumber(x); } //x is special symbol else if (x != ' ') { output = output + 'X'; } } return output; } /** * Abstract method that spells numbers in a certain language specified by the implementation * @param input character * @return spelled number */ public abstract String replaceNumber(char input); /** * Factory method that creates a specific InputPreparer * @param language language alias that specifies the language (de,fr,en) * @return concrete InputPreparer */ public static InputPreparer createInputPreparer(String language) { switch (language) { case "de": return new InputPreparerGerman(); case "fr": return new InputPreparerFrench(); default: return new InputPreparerEnglish(); } } } /** * Concrete implementation of a german InputPreparer */ class InputPreparerGerman extends InputPreparer { @Override public String replaceNumber(char input) { switch (input) { case '0': return "NULL"; case '1': return "EINS"; case '2': return "ZWEI"; case '3': return "DREI"; case '4': return "VIER"; case '5': return "FUENF"; case '6': return "SECHS"; case '7': return "SIEBEN"; case '8': return "ACHT"; default: return "NEUN"; } } } /** * Concrete implementation of an english InputPreparer */ class InputPreparerEnglish extends InputPreparer { @Override public String replaceNumber(char input) { switch (input) { case '0': return "ZERO"; case '1': return "ONE"; case '2': return "TWO"; case '3': return "THREE"; case '4': return "FOUR"; case '5': return "FIVE"; case '6': return "SIX"; case '7': return "SEVEN"; case '8': return "EIGHT"; default: return "NINE"; } } } /** * Concrete implementation of a french InputPreparer */ class InputPreparerFrench extends InputPreparer { @Override public String replaceNumber(char input) { switch (input) { case '0': return "ZERO"; case '1': return "UN"; case '2': return "DEUX"; case '3': return "TROIS"; case '4': return "QUATRE"; case '5': return "CINQ"; case '6': return "SIX"; case '7': return "SEPT"; case '8': return "HUIT"; default: return "NEUF"; } } }