/// <summary>
/// Indicates whether primary key value of the current instance equals to another primary key.
/// </summary>
/// <typeparam name="TPrimaryKey">The type of primary key</typeparam>
/// <param name="pkHolder">The primary key holder</param>
/// <param name="otherPk">The other primary key to check pk equality to</param>
/// <param name="comparer">The pk equality comparer to use, or null</param>
/// <returns>Returns a boolean value indicating that whether the primary key value of <paramref name="pkHolder"/> equals to the provided <paramref name="other"/> primary key.</returns>
public static bool PkEquals <TPrimaryKey>(this IReadOnlyPkHolder <TPrimaryKey> pkHolder, TPrimaryKey otherPk, IEqualityComparer <TPrimaryKey> comparer = null)
{
if (pkHolder == null)
{
return(false);
}
TPrimaryKey pk = pkHolder.GetPk();
return((comparer ?? EqualityComparer <TPrimaryKey> .Default).Equals(pk, otherPk));
}
/// <summary>
/// Indicates whether primary key value of the current instance equals to the primary key value of another instance.
/// </summary>
/// <typeparam name="TPrimaryKey">The type of primary key</typeparam>
/// <param name="pkHolder">The primary key holder</param>
/// <param name="other">The other primary key holder to check pk equality to</param>
/// <param name="comparer">The pk equality comparer to use, or null</param>
/// <returns>Returns a boolean value indicating that whether the primary key value of <paramref name="pkHolder"/> equals to the primary key value of the provided <paramref name="other"/> primary key holder.</returns>
public static bool PkEquals <TPrimaryKey>(this IReadOnlyPkHolder <TPrimaryKey> pkHolder, IReadOnlyPkHolder <TPrimaryKey> other, IEqualityComparer <TPrimaryKey> comparer = null)
{
if (pkHolder == null)
{
return(other == null);
}
if (object.ReferenceEquals(other, null) || (other == null))
{
return(false);
}
if (object.ReferenceEquals(pkHolder, other))
{
return(true);
}
TPrimaryKey pk = pkHolder.GetPk();
TPrimaryKey otherPk = other.GetPk();
return((comparer ?? EqualityComparer <TPrimaryKey> .Default).Equals(pk, otherPk));
}
