OIM plugin to generate custom userid

package oracle.iam.plugins;

import java.util.Locale;
import java.util.Map;

import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;

import oracle.iam.identity.exception.UserNameGenerationException;
import oracle.iam.identity.usermgmt.api.UserNamePolicy;
import oracle.iam.identity.usermgmt.utils.UserNameGenerationUtil;
import oracle.iam.identity.usermgmt.utils.UserNamePolicyUtil;
import oracle.iam.platform.kernel.ValidationFailedException;

public class ShahbazUserNamePolicy implements UserNamePolicy {
    private static final String CLASS_NAME =
        ShahbazUserNamePolicy.class.getSimpleName();

    private static final String policy =
        "ShahbazUserNamePolicy:Validation Failed: ";
    private static Logger logger =
        Logger.getLogger("COM.SHAHBAZ.ShahbazUserNamePolicy");

    public ShahbazUserNamePolicy() {
        super();
    }

    /**
     *This is the main method which gets trigger and generate user name based on requested input data e.g. first name and last name.
     * @param reqData - Map contains request data e.g. first name and last name
     * @return- generated user name
     * @throws ValidationFailedException
     */
    public String getUserNameFromPolicy(Map<String, String> reqData) throws ValidationFailedException {


        String METHOD_NAME = CLASS_NAME + ":" + "getUserNameFromPolicy: ";
        logger.log(Level.FINE, METHOD_NAME + ":START");

        String userName = null;

        String fullName =
            (String)reqData.get("First Name") + " " + (String)reqData.get("Last Name");
        logger.log(Level.FINE,
                   METHOD_NAME + ":Generating Network ID for User Full Name:" +
                   fullName);


        userName = generateNetworkId();
        userName = UserNameGenerationUtil.trimWhiteSpaces(userName);


        try {
            if ((UserNamePolicyUtil.isUserExists(userName)) ||
                (UserNamePolicyUtil.isUserNameReserved(userName))) {

                boolean userNameGenerated = false;

                for (int ix = 1; ix < Integer.MAX_VALUE; ix++) {
                    userName = generateNetworkId();
                    if (UserNameGenerationUtil.isUserNameExistingOrReserved(userName)) {
                        continue;
                    }
                    userNameGenerated = true;
                    break;
                }

                if (!userNameGenerated) {
                    String error_message =
                        "This should never happen. OIM is failed to generate unique user name for " +
                        fullName;
                    showErrorMessagePopup(error_message);
                }
            }
        } catch (UserNameGenerationException e) {
            logger.log(Level.SEVERE,
                       METHOD_NAME + "Exception: " + e.getMessage(), e);
        }

        System.out.println(METHOD_NAME +
                           ":Successfully generated unique network ID for " +
                           fullName + " Network ID: " + userName);
        logger.log(Level.FINE,
                   METHOD_NAME + ":Successfully generated unique network ID for " +
                   fullName + " Network ID: " + userName);
        logger.log(Level.FINE, METHOD_NAME + ":END");

        return userName;
    }

    @Override
    public boolean isUserNameValid(String string, Map<String, String> map) {
        return false;
    }

    @Override
    public String getDescription(Locale locale) {
        return "Generate Unique Network ID n + 5 random numbers + 2 random chars ShahbazUserNamePolicy";
    }

    /**
     *This method is used to generate random netowork id
     * @returns random network id
     */
    private static String generateNetworkId() {

        Random rand = new Random();
        String userid = "n";

        int pick = rand.nextInt(90000) + 10000;
        userid = userid.concat(Integer.toString(pick));

        char c1 = (char)(rand.nextInt(26) + 'a');
        char c2 = (char)(rand.nextInt(26) + 'a');
        userid = userid.concat(Character.toString(c1));
        userid = userid.concat(Character.toString(c2));

        return userid;

    }


    /**
     *This method is used to show error message popup if there is any validation failure.
     * @param errorMessage - Message to be displayed.
     * @throws ValidationFailedException
     */
    private void showErrorMessagePopup(String errorMessage) throws ValidationFailedException {

        String error_message = policy + errorMessage;
        ValidationFailedException exception =
            new ValidationFailedException(error_message);
        exception.setErrorCode("IAM-3050105");
        exception.setErrorData(new Object[] { error_message });
        throw exception;

    }

 /*   public static void main(String[] args) {
        ShahbazUserNamePolicy unamePolicy = new ShahbazUserNamePolicy();
        for (int j = 0; j < 10; j++) {
            System.out.println(unamePolicy.generateNetworkId());
        }
    }
*/
}