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refactor(archival): ♻ update ValueObject impl

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Collin M. Barrett 2020-11-15 13:03:21 -06:00
parent 32aff9916c
commit 92c5261400
1 changed files with 32 additions and 16 deletions
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48
services/Archival/FilterLists.Archival.Domain/SeedWork/ValueObject.cs
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@ -3,42 +3,58 @@
namespace FilterLists.Archival.Domain.SeedWork
{
/// <remarks>https://enterprisecraftsmanship.com/posts/value-object-better-implementation/</remarks>
public abstract class ValueObject
{
protected static bool EqualOperator(ValueObject left, ValueObject right)
{
return left.Equals(right);
}
protected static bool NotEqualOperator(ValueObject left, ValueObject right)
{
return !EqualOperator(left, right);
}
protected abstract IEnumerable<object> GetEqualityComponents();
public override bool Equals(object? obj)
{
if (obj is null)
if (obj == null)
{
return false;
}
if (obj.GetType() != GetType())
if (GetType() != obj.GetType())
{
return false;
}
var other = (ValueObject)obj;
var valueObject = (ValueObject)obj;
return GetEqualityComponents().SequenceEqual(other.GetEqualityComponents());
return GetEqualityComponents().SequenceEqual(valueObject.GetEqualityComponents());
}
public override int GetHashCode()
{
return GetEqualityComponents()
.Select(x => x?.GetHashCode() ?? 0)
.Aggregate((x, y) => x ^ y);
.Aggregate(1, (current, obj) =>
{
unchecked
{
return (current * 23) + (obj?.GetHashCode() ?? 0);
}
});
}
public static bool operator ==(ValueObject? a, ValueObject? b)
{
if (ReferenceEquals(a, null) && ReferenceEquals(b, null))
{
return true;
}
if (ReferenceEquals(a, null) || ReferenceEquals(b, null))
{
return false;
}
return a.Equals(b);
}
public static bool operator !=(ValueObject? a, ValueObject? b)
{
return !(a == b);
}
}
}