Question

I create service and I need create class MyErrors (not exception)

My web method returned or data or error, example response “#45#Not valid login or password.“

# – is a flag that says an error has occurred
45 – code error.

example use error class:

int returnValue = ExistLogin(login);
if (returnValue==0) {
    return Registaration(login, name, password);
} else if(returnValue==1) {
    return Errors.LOGIN_ALREADY_EXISTS.ToString();
}
else return Errors.ConvertToString(returnValue);

Errors.LOGIN_ALREADY_EXISTS – return number <-1

Errors.LOGIN_ALREADY_EXISTS – return string #-1#Error bla bla bla

how best to create a class?

Answer 1

You can use a Java enum for this:

public enum Errors {
    LOGIN_ALREADY_EXISTS(-1, "The username is already in use."),
    UNKNOWN(0, "Unknown");

    private final int errorCode;
    private final String message;

    private Errors(int errorCode, String message) {
        this.errorCode = errorCode;
        this.message = message;
    }

    public int getErrorCode() {
        return errorCode;
    }

    public String getMessage() {
        return message;
    }

    @Override
    public String toString() {
        return "#" + errorCode + "#" + message;
    }
}