Created Bifid cipher

src/main/java/com/mattrixwv/CipherStreamJava/polySubstitution/Columnar.java

@@ -1,7 +1,7 @@
 //MattrixwvWebsite/src/main/java/com/mattrixwv/CipherStreamJava/polySubstitution/Columnar.java
 //Mattrixwv
 // Created: 01-16-22
-//Modified: 02-17-22
+//Modified: 03-03-22
 package com.mattrixwv.CipherStreamJava.polySubstitution;
 
 
@@ -15,17 +15,18 @@ import com.mattrixwv.CipherStreamJava.exceptions.InvalidKeywordException;
 
 
 public class Columnar{
-	private boolean preserveCapitals;	//Whether to respect capitals in the output string
-	private boolean preserveWhitespace;	//Whether to respect whitespace in the output string
-	private boolean preserveSymbols;	//Whether to respect symbols in the output string
-	private boolean removePadding;	//Whether to respect the padding letters added to the cipher
 	private String inputString;		//The message that needs to be encoded/decoded
 	private String outputString;	//The encoded/decoded message
-	private String keyword;	//The keyword used to create the grid
+	private String keyword;			//The keyword used to create the grid
 	private char characterToAdd;	//The character that is added to the end of a string to bring it to the correct length
-	private int charsAdded;	//The number of characters that were added to the end of the message
+	private int charsAdded;			//The number of characters that were added to the end of the message
 	private ArrayList<ArrayList<Character>> grid;	//The grid used to encode/decode the message
+	private boolean preserveCapitals;	//Persist capitals in the output string
+	private boolean preserveWhitespace;	//Persist whitespace in the output string
+	private boolean preserveSymbols;	//Persist symbols in the output string
+	private boolean removePadding;	//Remove the padding letters added to the cipher
 
+	//Strip the inputString of all non-letter characters and change them to capitals
 	private String getCleanInputString(){
 		return inputString.toUpperCase().replaceAll("[^A-Z]", "");
 	}
@@ -75,15 +76,17 @@ public class Columnar{
 	}
 	//Strips invalid characters from the string that needs encoded/decoded
 	private void setInputStringEncode(String inputString) throws InvalidInputException{
+		//Ensure the input isn't null
 		if(inputString == null){
 			throw new InvalidInputException("Input must not be null");
 		}
 
+		//Apply removal options
 		if(!preserveCapitals){
 			inputString = inputString.toUpperCase();
 		}
 		if(!preserveWhitespace){
-			inputString = inputString.replaceAll("[\\s]", "");
+			inputString = inputString.replaceAll("\\s", "");
 		}
 		if(!preserveSymbols){
 			inputString = inputString.replaceAll("[^a-zA-Z\\s]", "");
@@ -104,17 +107,21 @@ public class Columnar{
 		charsAdded = charsToAdd;
 		inputString = inputStringBuilder.toString();
 
+		//Save the string
 		this.inputString = inputString;
 
+		//Ensure the string isn't blank
 		if(this.inputString.isBlank() || getCleanInputString().isBlank()){
 			throw new InvalidInputException("Input cannot be blank");
 		}
 	}
 	private void setInputStringDecode(String inputString) throws InvalidInputException{
+		//Ensure the input isn't null
 		if(inputString == null){
 			throw new InvalidInputException("Input must not be null");
 		}
 
+		//Apply removal options
 		if(!preserveCapitals){
 			inputString = inputString.toUpperCase();
 		}
@@ -177,12 +184,13 @@ public class Columnar{
 		//Save the input
 		this.inputString = inputString;
 
+		//Ensure the string isn't blank
 		if(this.inputString.isBlank() || getCleanInputString().isBlank()){
 			throw new InvalidInputException("Input cannot be blank");
 		}
 	}
 	//Creates the output string from the grid
-	private String createOutputStringFromColumns(){
+	private void createOutputStringFromColumns(){
 		//Get the current rows of any characters that you added
 		ArrayList<Integer> colsAddedTo = new ArrayList<Integer>();
 		if(removePadding){
@@ -224,9 +232,8 @@ public class Columnar{
 
 		//Save and return the output
 		outputString = output.toString();
-		return outputString;
 	}
-	private String createOutputStringFromRows(){
+	private void createOutputStringFromRows(){
 		//Turn the grid into a string
 		StringBuilder gridOutput = new StringBuilder();
 		for(int row = 1;row < grid.size();++row){
@@ -282,14 +289,15 @@ public class Columnar{
 
 		//Save and return the output
 		outputString = output.toString();
-		return outputString;
 	}
 	//Strips invalid characters from the keyword and creates the grid
 	private void setKeyword(String keyword) throws InvalidKeywordException{
+		//Ensure the keyword isn't null
 		if(keyword == null){
 			throw new NullPointerException("Keyword cannot be null");
 		}
 
+		//Strip all non-letter characters and change them to uppercase
 		this.keyword = keyword.toUpperCase().replaceAll("[^A-Z]", "");
 
 		//Make sure a valid keyword is present
@@ -361,27 +369,28 @@ public class Columnar{
 		grid = newGrid;
 	}
 	//Encodes inputString using the Columnar cipher and stores the result in outputString
-	private String encode(){
+	private void encode(){
 		//Create the grid
 		createGridEncode();
 		//Figure out the new column order
 		ArrayList<Integer> orderedLocations = getKeywordAlphaLocations();
 		//Rearange the grid to the new order
 		rearangeGrid(orderedLocations);
-		//Create and return the output
+		//Create the output
-		return createOutputStringFromColumns();
+		createOutputStringFromColumns();
 	}
 	//Decodes inputString using the Columnar cipher and stores the result in outputString
-	private String decode(){
+	private void decode(){
 		//Create the grid
 		createGridDecode();
 		ArrayList<Integer> originalOrder = getKeywordOriginalLocations();
 		//Rearange the grid to the original order
 		rearangeGrid(originalOrder);
-		//Create and return the output
+		//Create the output
-		return createOutputStringFromRows();
+		createOutputStringFromRows();
 	}
 
+	//Constructor
 	public Columnar() throws InvalidCharacterException{
 		preserveCapitals = false;
 		preserveWhitespace = false;
@@ -406,17 +415,27 @@ public class Columnar{
 		setCharacterToAdd(characterToAdd);
 		reset();
 	}
-	//Sets the keyword, grid, and inputString and encodes the message
+	//Encodes inputString using keyword and returns the result
 	public String encode(String keyword, String inputString) throws InvalidKeywordException, InvalidInputException{
+		//Set the parameters
+		reset();
 		setKeyword(keyword);
 		setInputStringEncode(inputString);
-		return encode();
+
+		//Encode and return the message
+		encode();
+		return outputString;
 	}
-	//Sets the keyword, grid, and inputString and decodes the message
+	//Encodes inputString using keyword and returns the result
 	public String decode(String keyword, String inputString) throws InvalidKeywordException, InvalidInputException{
+		//Set the parameters
+		reset();
 		setKeyword(keyword);
 		setInputStringDecode(inputString);
-		return decode();
+
+		//Decode and return the message
+		decode();
+		return outputString;
 	}
 
 	//Makes sure all variables are empty