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tbarnes98
2019-08-13 11:40:00 -05:00
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18
Labs/Lab 7/.idea/checkstyle-idea.xml generated Normal file
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This folder contains libraries copied from the "Lab 7" project.
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11
Labs/Lab 7/Lab 7.iml Normal file
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5
Labs/Lab 7/decoded.txt Normal file
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A SPACE SHOULD BE PLACED BETWEEN EACH ENCODED CHARACTER.
A SHOULD BE PLACED BETWEEN EACH WORD.
LINE BREAKS IN THE INPUT FILE SHOULD BE REPLICATED IN THE ENCODED FILE.

5
Labs/Lab 7/encoded.txt Normal file
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.- | ... .--. .- -.-. . | ... .... --- ..- .-.. -.. | -... . | .--. .-.. .- -.-. . -.. | -... . - .-- . . -. | . .- -.-. .... | . -. -.-. --- -.. . -.. | -.-. .... .- .-. .- -.-. - . .-. .-.-.- |
.- | * | ... .... --- ..- .-.. -.. | -... . | .--. .-.. .- -.-. . -.. | -... . - .-- . . -. | . .- -.-. .... | .-- --- .-. -.. .-.-.- |
.-.. .. -. . | -... .-. . .- -.- ... | .. -. | - .... . | .. -. .--. ..- - | ..-. .. .-.. . | ... .... --- ..- .-.. -.. | -... . | .-. . .--. .-.. .. -.-. .- - . -.. | .. -. | - .... . | . -. -.-. --- -.. . -.. | ..-. .. .-.. . .-.-.- |

40
Labs/Lab 7/morsecode.txt Normal file
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A .-
B -...
C -.-.
D -..
E .
F ..-.
G --.
H ....
I ..
J .---
K -.-
L .-..
M --
N -.
O ---
P .--.
Q --.-
R .-.
S ...
T -
U ..-
V ...-
W .--
X -..-
Y -.--
Z --..
0 -----
1 .----
2 ..---
3 ...--
4 ....-
5 .....
6 -....
7 --...
8 ---..
9 ----.
. .-.-.-
, --..--
/ -..-.
? ..--..

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Labs/Lab 7/src/barnestr/MorseDecoder.java Normal file
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/*
* CS 2852
* Fall 2018
* Lab 7 - Morse Code Decoder
* Name: Trevor Barnes
* Created: 10/15/18
*/
package barnestr;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;
import java.util.StringTokenizer;
/**
* The main class that builds a morse tree and decodes an encoded file.
* This decoded data is then written out to another file
*
* @author Trevor Barnes
* @version 2.0
*/
public class MorseDecoder {
private static MorseTree<Character> tree = new MorseTree<>();
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
loadDecoder(new File("morsecode.txt"));
System.out.println("Enter an input filename:");
String inputFile = in.nextLine();
System.out.println("Enter an output filename:");
String outputFile = in.nextLine();
decodeFile(inputFile, outputFile);
System.out.println("Encoded file saved in project directory");
}
/**
* Loads in a file with morse code data and builds a Morse Code decoding tree.
* @param file the Morse Code "key" file
*/
public static void loadDecoder(File file) {
try (Scanner sc = new Scanner(file)) {
while (sc.hasNext()) {
String line = sc.nextLine();
String code = line.substring(2, Math.max(line.lastIndexOf('.'),
line.lastIndexOf('-')) + 1);
tree.add(line.charAt(0), code);
}
} catch (FileNotFoundException e) {
System.out.println("Warning! File not found!");
}
}
/**
* Accepts the file location of an encoded file then decodes the data in a file
* @param inputFileName the name of the file to be decoded
* (assuming it is located in the project directory)
* @param outputFileName the name given name for the encoded output file
*/
public static void decodeFile(String inputFileName, String outputFileName) {
File encodedFile = new File(inputFileName);
File decodedFile = new File(outputFileName);
try (Scanner sc = new Scanner(encodedFile)) {
try (PrintWriter pw = new PrintWriter(decodedFile)) {
while (sc.hasNextLine()) {
StringTokenizer line = new StringTokenizer(sc.nextLine());
while (line.hasMoreTokens()) {
String token = line.nextToken();
if (token.equals("|")) {
pw.append(" ");
} else {
try {
char symbol = tree.decode(token);
pw.append(symbol);
} catch (IllegalArgumentException e) {
System.out.println("Warning! Skipping: " + token);
}
}
}
pw.append("\n");
}
}
} catch (FileNotFoundException e) {
System.out.println("Warning! File not found!");
}
}
}

116
Labs/Lab 7/src/barnestr/MorseTree.java Normal file
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/*
* CS 2852
* Fall 2018
* Lab 7 - Morse Code Decoder
* Name: Trevor Barnes
* Created: 10/15/18
*/
package barnestr;
/**
* A class that represents a BinaryTree used to decode Morse Code files
*
* @param <E> the generic value used to construct the tree
*/
public class MorseTree<E> {
private static class Node<E> {
private E data;
private Node<E> left;
private Node<E> right;
private Node(E data) {
this.data = data;
left = null;
right = null;
}
@Override
public String toString() {
if (data == null) {
return null;
} else {
return data.toString();
}
}
}
private Node<E> root;
/**
* The constructor for a MorseTree that sets the root node's data to null
*/
public MorseTree() {
this.root = new Node<>(null);
}
/**
* A method that sets the passed in root to whatever result is given from
* the call to the recursive add method.
*
* @param symbol the symbol to be set at the given code location
* @param code the code that determines where a symbol will be placed in the tree
*/
public void add(E symbol, String code) {
root = addRecursive(root, symbol, code);
}
private Node<E> addRecursive(Node<E> localRoot, E symbol, String code) {
if (code.isEmpty()) {
// If the code string is empty, the symbol's location has been reached.
// Returns the new Node with the symbol as its data.
localRoot.data = symbol;
return localRoot;
}
if (code.charAt(0) == '.') {
// If the branch does not exist, add a Node with null data
if (localRoot.left == null) {
localRoot.left = new Node<>(null);
}
// Add in the left half of the localRoot's subtree
localRoot.left = addRecursive(localRoot.left, symbol, code.substring(1));
} else if (code.charAt(0) == '-') {
// If the branch does not exist, add a Node with null data
if (localRoot.right == null) {
localRoot.right = new Node<>(null);
}
// Add in the right half of the localRoot's subtree
localRoot.right = addRecursive(localRoot.right, symbol, code.substring(1));
}
// Return the localRoot Node
return localRoot;
}
/**
* A method retrieves a symbol by traversing the tree with the given
* code by calling a recursive decode method
*
* @param code the code that signifies the location of a value in the tree
* @return a generic with whatever value was decoded
* @throws IllegalArgumentException thrown when anything other than a
* dot or line is passed to it
*/
public E decode(String code) throws IllegalArgumentException {
Node<E> data = decodeRecursive(root, code);
return data.data;
}
private Node<E> decodeRecursive(Node<E> localRoot, String code) {
if (!code.startsWith(".") && !code.startsWith("-") && !code.isEmpty()) {
throw new IllegalArgumentException();
}
if (code.startsWith(".")) {
return decodeRecursive(localRoot.left, code.substring(1));
} else if (code.startsWith("-")) {
return decodeRecursive(localRoot.right, code.substring(1));
}
return localRoot;
}
}