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import java.util.Arrays; |
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public class ExerciseRunner { |
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public static void main(String[] args) { |
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ConfigProtector protector = new ConfigProtector(); |
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// Test case 1
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String configFile1 = "username=admin\npassword=secret\nhost=localhost\n"; |
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List<String> sensitiveKeys1 = Arrays.asList("password"); |
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System.out.println("Protected Config 1:\n" + protector.hideSensitiveData(configFile1, sensitiveKeys1)); |
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// Test case 2
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String configFile2 = "apiKey=12345\napiSecret=abcdef\nendpoint=https://api.example.com\n"; |
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List<String> sensitiveKeys2 = Arrays.asList("apiKey", "apiSecret"); |
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System.out.println("Protected Config 2:\n" + protector.hideSensitiveData(configFile2, sensitiveKeys2)); |
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// Test case 3
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String configFile3 = "username=user\npassword=pass\n"; |
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List<String> sensitiveKeys3 = Arrays.asList("username", "password"); |
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System.out.println("Protected Config 3:\n" + protector.hideSensitiveData(configFile3, sensitiveKeys3)); |
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} |
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} |
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## Config Protector |
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### Instructions |
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Create a class `ConfigProtector` that provides a method to hide sensitive data in a configuration file using regex. The method should replace sensitive values with asterisks. The configuration file will be provided as a string, and the keys for the sensitive data will be given in a list. |
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### Expected Class |
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```java |
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import java.util.List; |
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public class ConfigProtector { |
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public String hideSensitiveData(String configFile, List<String> sensitiveKeys) { |
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// Implementation to hide sensitive data in the configuration file using regex |
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} |
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} |
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``` |
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### Usage |
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Here is a possible `ExerciseRunner.java` to test your class: |
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```java |
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import java.util.Arrays; |
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public class ExerciseRunner { |
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public static void main(String[] args) { |
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ConfigProtector protector = new ConfigProtector(); |
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// Test case 1 |
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String configFile1 = "username=admin\npassword=secret\nhost=localhost\n"; |
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List<String> sensitiveKeys1 = Arrays.asList("password"); |
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System.out.println("Protected Config 1:\n" + protector.hideSensitiveData(configFile1, sensitiveKeys1)); |
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// Test case 2 |
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String configFile2 = "apiKey=12345\napiSecret=abcdef\nendpoint=https://api.example.com\n"; |
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List<String> sensitiveKeys2 = Arrays.asList("apiKey", "apiSecret"); |
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System.out.println("Protected Config 2:\n" + protector.hideSensitiveData(configFile2, sensitiveKeys2)); |
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// Test case 3 |
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String configFile3 = "username=user\npassword=pass\n"; |
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List<String> sensitiveKeys3 = Arrays.asList("username", "password"); |
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System.out.println("Protected Config 3:\n" + protector.hideSensitiveData(configFile3, sensitiveKeys3)); |
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} |
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} |
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``` |
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### Expected Output |
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```shell |
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$ javac *.java -d build |
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$ java -cp build ExerciseRunner |
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Protected Config 1: |
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username=admin |
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password=****** |
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host=localhost |
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Protected Config 2: |
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apiKey=***** |
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apiSecret=****** |
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endpoint=https://api.example.com |
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Protected Config 3: |
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username=**** |
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password=**** |
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$ |
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``` |
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