From 7ece806cf5cae7c3531f2eb54c56cf33fed2e579 Mon Sep 17 00:00:00 2001 From: aryan1165 <111041731+aryan1165@users.noreply.github.com> Date: Tue, 26 Dec 2023 03:54:28 +0530 Subject: [PATCH] Remove duplicate file of Simple Substitution Cipher (fixes #4494) (#4495) --- DIRECTORY.md | 2 - .../ciphers/SimpleSubstitutionCipher.java | 83 ------------------- .../ciphers/SimpleSubstitutionCipherTest.java | 48 ----------- 3 files changed, 133 deletions(-) delete mode 100644 src/main/java/com/thealgorithms/ciphers/SimpleSubstitutionCipher.java delete mode 100644 src/test/java/com/thealgorithms/ciphers/SimpleSubstitutionCipherTest.java diff --git a/DIRECTORY.md b/DIRECTORY.md index b769250e..fd50b291 100644 --- a/DIRECTORY.md +++ b/DIRECTORY.md @@ -48,7 +48,6 @@ * [ProductCipher](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/ProductCipher.java) * [RSA](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/RSA.java) * [SimpleSubCipher](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/SimpleSubCipher.java) - * [SimpleSubstitutionCipher](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/SimpleSubstitutionCipher.java) * [Vigenere](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/ciphers/Vigenere.java) * conversions * [AnyBaseToAnyBase](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/conversions/AnyBaseToAnyBase.java) @@ -596,7 +595,6 @@ * [PolybiusTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/PolybiusTest.java) * [RSATest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/RSATest.java) * [SimpleSubCipherTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/SimpleSubCipherTest.java) - * [SimpleSubstitutionCipherTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/SimpleSubstitutionCipherTest.java) * [VigenereTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/ciphers/VigenereTest.java) * conversions * [BinaryToDecimalTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/conversions/BinaryToDecimalTest.java) diff --git a/src/main/java/com/thealgorithms/ciphers/SimpleSubstitutionCipher.java b/src/main/java/com/thealgorithms/ciphers/SimpleSubstitutionCipher.java deleted file mode 100644 index 6ce3c564..00000000 --- a/src/main/java/com/thealgorithms/ciphers/SimpleSubstitutionCipher.java +++ /dev/null @@ -1,83 +0,0 @@ -package com.thealgorithms.ciphers; - -import java.util.HashMap; -import java.util.Map; - -/** - * The simple substitution cipher is a cipher that has been in use for many - * hundreds of years (an excellent history is given in Simon Singhs 'the Code - * Book'). It basically consists of substituting every plaintext character for a - * different ciphertext character. It differs from the Caesar cipher in that the - * cipher alphabet is not simply the alphabet shifted, it is completely jumbled. - * - * @author Hassan Elseoudy - */ -public class SimpleSubstitutionCipher { - - /** - * Encrypt text by replacing each element with its opposite character. - * - * @return Encrypted message - */ - public static String encode(String message, String cipherSmall) { - StringBuilder encoded = new StringBuilder(); - - // This map is used to encode - Map cipherMap = new HashMap<>(); - - char beginSmallLetter = 'a'; - char beginCapitalLetter = 'A'; - - cipherSmall = cipherSmall.toLowerCase(); - String cipherCapital = cipherSmall.toUpperCase(); - - // To handle Small and Capital letters - for (int i = 0; i < cipherSmall.length(); i++) { - cipherMap.put(beginSmallLetter++, cipherSmall.charAt(i)); - cipherMap.put(beginCapitalLetter++, cipherCapital.charAt(i)); - } - - for (int i = 0; i < message.length(); i++) { - if (Character.isAlphabetic(message.charAt(i))) { - encoded.append(cipherMap.get(message.charAt(i))); - } else { - encoded.append(message.charAt(i)); - } - } - - return encoded.toString(); - } - - /** - * Decrypt message by replacing each element with its opposite character in - * cipher. - * - * @return message - */ - public static String decode(String encryptedMessage, String cipherSmall) { - StringBuilder decoded = new StringBuilder(); - - Map cipherMap = new HashMap<>(); - - char beginSmallLetter = 'a'; - char beginCapitalLetter = 'A'; - - cipherSmall = cipherSmall.toLowerCase(); - String cipherCapital = cipherSmall.toUpperCase(); - - for (int i = 0; i < cipherSmall.length(); i++) { - cipherMap.put(cipherSmall.charAt(i), beginSmallLetter++); - cipherMap.put(cipherCapital.charAt(i), beginCapitalLetter++); - } - - for (int i = 0; i < encryptedMessage.length(); i++) { - if (Character.isAlphabetic(encryptedMessage.charAt(i))) { - decoded.append(cipherMap.get(encryptedMessage.charAt(i))); - } else { - decoded.append(encryptedMessage.charAt(i)); - } - } - - return decoded.toString(); - } -} diff --git a/src/test/java/com/thealgorithms/ciphers/SimpleSubstitutionCipherTest.java b/src/test/java/com/thealgorithms/ciphers/SimpleSubstitutionCipherTest.java deleted file mode 100644 index f7cace2e..00000000 --- a/src/test/java/com/thealgorithms/ciphers/SimpleSubstitutionCipherTest.java +++ /dev/null @@ -1,48 +0,0 @@ -package com.thealgorithms.ciphers; - -import static org.junit.jupiter.api.Assertions.assertEquals; - -import org.junit.jupiter.api.Test; - -public class SimpleSubstitutionCipherTest { - - @Test - void testEncode() { - // Given - String message = "HELLOWORLD"; - String key = "phqgiumeaylnofdxjkrcvstzwb"; - - // When - String actual = SimpleSubstitutionCipher.encode(message, key); - - // Then - assertEquals("EINNDTDKNG", actual); - } - - @Test - void testDecode() { - // Given - String message = "EINNDTDKNG"; - String key = "phqgiumeaylnofdxjkrcvstzwb"; - - // When - String actual = SimpleSubstitutionCipher.decode(message, key); - - // Then - assertEquals("HELLOWORLD", actual); - } - - @Test - void testIsTextTheSameAfterEncodeAndDecode() { - // Given - String text = "HELLOWORLD"; - String key = "phqgiumeaylnofdxjkrcvstzwb"; - - // When - String encodedText = SimpleSubstitutionCipher.encode(text, key); - String decodedText = SimpleSubstitutionCipher.decode(encodedText, key); - - // Then - assertEquals(text, decodedText); - } -}