This Money class represents an amount of money in a particular currency. It has a private amount property and a private currency property, both of which are readonly. The class also has a constructor that takes an amount and a currency, and getters for accessing those properties.
The class also has add, subtract, equals, and toString methods. The add and subtract methods take another Money object as an argument and return a new Money object representing the result of adding or subtracting the two amounts. The equals method takes another Money object as an argument and returns true if the two objects represent the same amount of money in the same currency. The toString method returns a string representation of the amount and currency, like "10.00 USD".
Finally, the class has a private static validCurrencies property, which is an array of strings representing valid currency codes. The isValidCurrency static method checks if a given currency code is valid by checking if it's included in the validCurrencies array. If the currency code is invalid, the constructor throws an error.
This Email class represents an email address. It has a private value property, which is a string representing the email address. The class has a constructor that takes a string value. The constructor also checks if the provided string is a valid email address using a regular expression pattern. If it's not valid, the constructor throws an error.
The class also has a getValue method that returns the email address as a string, an equals method that takes another Email object as an argument and returns true if the two objects have the same value, and a toString method that returns the email address as a string.
Finally, the class has a private static regexPattern property, which is a regular expression pattern for validating email addresses. The isValidEmail static method checks if a given string matches the regexPattern. If the string is not a valid email address, the constructor throws an error.
This UUID class represents a Universally Unique Identifier (UUID), which is a 128-bit identifier. It has a private value property and a constructor that takes a string value. The constructor checks if the provided string is a valid UUID using a regular expression pattern. If it's not valid, the constructor throws an error.
The class also has a getValue method that returns the UUID value as a string, an equals method that takes another UUID object as an argument and returns true if the two objects have the same value, and a toString method that returns the UUID value as a string.
Finally, the class has a private static regexPattern property, which is a regular expression pattern for validating UUIDs. The isValid static method checks if a given string matches the regexPattern. If the string is not a valid UUID, the constructor throws an error.
This DayOnly class represents a day-only date, which is a date without any time information. It has a private value property, which is a Date object representing the day-only date. The class has a constructor that takes a Date object and sets the time to midnight. The constructor also checks if the provided date is valid by checking if it's a valid Date object.
The class also has a getValue method that returns a new Date object representing the day-only date, to prevent mutation. The equals method takes another DayOnly object as an argument and returns true if the two objects represent the same day-only date. The toString method returns a string representation of the day-only date in ISO 8601 format (yyyy-MM-dd).
Finally, the class has a private static isValidDate method that checks if a given Date object is valid by checking if its getTime method returns a valid time value. If the date is invalid, the constructor throws an error.