Money klasa

K1SR

Jun 18th, 2025

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C# 2.41 KB | None | 0 0

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public class Money
{
public decimal Amount { get; private set; } // privatni setter, vrednost se postavlja samo u konstruktoru
public string Currency { get; private set; } // privatni setter
public Money(decimal amount, string currency)
{
// Self-validating: Validacija pri konstrukciji
if (amount < 0)
{
throw new ArgumentException("Amount must be positive.");
}
if (string.IsNullOrWhiteSpace(currency))
{
throw new ArgumentException("Currency cannot be null or empty.");
}
Amount = amount;
Currency = currency;
}
// Behavior-rich i Immutable: Vraća novi objekat, ne menja postojeći
public Money Add(Money other)
{
if (!IsSameCurrency(other))
{
throw new InvalidOperationException("Cannot add money of different currencies.");
}
return new Money(Amount + other.Amount, Currency);
}
// Behavior-rich i Immutable: Vraća novi objekat, ne menja postojeći
public Money Subtract(Money other)
{
if (!IsSameCurrency(other))
{
throw new InvalidOperationException("Cannot subtract money of different currencies.");
}
// Možda dodatna validacija da rezultat ne ide u minus ako je to poslovno pravilo
return new Money(Amount - other.Amount, Currency);
}
private bool IsSameCurrency(Money other)
{
return Currency.Equals(other.Currency, StringComparison.OrdinalIgnoreCase);
}
// Jednakost po vrednostima: Override Equals i GetHashCode metode
public override bool Equals(object obj)
{
if (obj == null || GetType() != obj.GetType())
{
return false;
}
Money other = (Money)obj;
return Amount == other.Amount && Currency.Equals(other.Currency, StringComparison.OrdinalIgnoreCase);
}
public override int GetHashCode()
{
return HashCode.Combine(Amount, Currency.ToUpperInvariant());
}
// Moguće i predefinisanje operatora za jednakost i nejednakost
public static bool operator ==(Money a, Money b)
{
if (ReferenceEquals(a, null))
{
return ReferenceEquals(b, null);
}
return a.Equals(b);
}
public static bool operator !=(Money a, Money b)
{
return !(a == b);
}
}

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