Level 38, Lesson 06, Home 01

ExceptionApplicationMessage.java

package com.javarush.test.level38.lesson06.home01;

public enum ExceptionApplicationMessage {
    UNHANDLED_EXCEPTION,
    SOCKET_IS_CLOSED
}

ExceptionDBMessage.java

package com.javarush.test.level38.lesson06.home01;

public enum ExceptionDBMessage {
    NOT_ENOUGH_CONNECTIONS,
    RESULT_HAS_NOT_GOTTEN_BECAUSE_OF_TIMEOUT
}

ExceptionFactory.java

package com.javarush.test.level38.lesson06.home01;

/**
 * Created by ruslan on 11.09.16.
 */

public class ExceptionFactory
{
    public static Throwable getException(Enum enumeration) {

        if (enumeration != null) {

            String msg = enumeration.name().charAt(0) + enumeration.name().substring(1).toLowerCase().replace("_", " ");

            if (enumeration instanceof ExceptionApplicationMessage) {
                return new Exception(msg);
            }
            else if (enumeration instanceof ExceptionDBMessage) {
                return new RuntimeException(msg);
            }
            else if (enumeration instanceof ExceptionUserMessage) {
                return new Error(msg);
            }
        }
        return new IllegalArgumentException();
    }
}

ExceptionUserMessage.java

package com.javarush.test.level38.lesson06.home01;

public enum ExceptionUserMessage {
    USER_DOES_NOT_EXIST,
    USER_DOES_NOT_HAVE_PERMISSIONS
}

Solution.java

package com.javarush.test.level38.lesson06.home01;

public class Solution {
    public static Class getFactoryClass() {
        return ExceptionFactory.class;
    }

    public static void main(String[] args)
    {
        System.out.println(getFactoryClass());
    }
}