Package com.ntu.fdae.group1.bto.utils

Class ValidationUtil

java.lang.Object

com.ntu.fdae.group1.bto.utils.ValidationUtil

public class ValidationUtil
extends Object

Utility class providing validation methods for common data types and formats in the BTO Management System.

This class contains static methods for validating various inputs against specific format requirements, such as NRIC validation. It provides a centralized location for all validation logic to ensure consistency throughout the application.

All methods in this class are designed to be null-safe and follow consistent validation patterns.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ALLOWED_SPECIAL_CHARS	Defines the set of special characters allowed in passwords.

Method Summary

Modifier and Type	Method	Description
static boolean	isValidNric(String nric)	Validates if a string conforms to the Singapore NRIC format.
static String	validatePasswordStrength(String password)	Validates a password against the defined strength criteria.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

ALLOWED_SPECIAL_CHARS

public static final String ALLOWED_SPECIAL_CHARS

Defines the set of special characters allowed in passwords.

See Also:

• Constant Field Values

Method Details

isValidNric

public static boolean isValidNric(String nric)

Validates if a string conforms to the Singapore NRIC format. This method checks if the provided string:

• Is not null
• Matches the NRIC format pattern: starting with S, T, F, or G, followed by exactly 7 digits, and ending with a capital letter

The validation only checks the format and not whether the NRIC is actually valid according to the checksum algorithm.

Parameters:

nric - The NRIC string to validate

Returns:

true if the string is in valid NRIC format, false otherwise (including for null input)

validatePasswordStrength

public static String validatePasswordStrength(String password)

Validates a password against the defined strength criteria. Criteria: - Between MIN_LENGTH and MAX_LENGTH characters (inclusive) - At least 1 uppercase letter - At least 1 lowercase letter - At least 1 digit - At least 1 special symbol (from ALLOWED_SPECIAL_CHARS) - No whitespace characters

Parameters:

password - The password string to validate.

Returns:

A String containing an error message if validation fails, or null if the password is valid.