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package ee.tlu.htk.dippler.utils;

import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.UUID;

/**
 *
 * @author metz
 */
public class GenerateId {
    public static String generateUID() {
        return UUID.randomUUID().toString();
    }

    public static String getUID(String prefix) {
        return prefix+getUID();
    }

    public static String getUID() {
        try {
            //Initialize SecureRandom
            //This is a lengthy operation, to be done only upon
            //initialization of the application
            SecureRandom prng = SecureRandom.getInstance("SHA1PRNG");

            //generate a random number
            String randomNum = new Integer(prng.nextInt()).toString();

            return GenerateHash.generateSHA1(randomNum);
        } catch (NoSuchAlgorithmException ex) {
            System.err.println(ex);
        }
        return null;
    }
}