/// <summary>
/// test if Energiemenge has only one <see cref="Mengeneinheit"/>
/// </summary>
/// <param name="em">Energiemenge</param>
/// <returns>true iff the Energiemenge->energieverbrauch list does only contain entries with mutually convertible units</returns>
public static bool IsPureMengeneinheit(this BO4E.BO.Energiemenge em)
{
using (MiniProfiler.Current.Step(nameof(IsPureMengeneinheit)))
{
ISet <Mengeneinheit> einheiten = new HashSet <Mengeneinheit>();
em.Energieverbrauch.All <Verbrauch>(v => einheiten.Add(v.Einheit));
if (einheiten.Count <= 1)
{
return(true);
}
else
{
Mengeneinheit me1 = einheiten.First <Mengeneinheit>();
foreach (Mengeneinheit me2 in einheiten)
{
if (!me1.IsConvertibleTo(me2))
{
return(false);
}
}
return(true);
}
}
}
/// <summary>
/// returns the factor that is needed to convert an amount in unit <paramref name="me1" /> to an equivalent amount in
/// unit <paramref name="me2" />.
/// </summary>
/// <param name="me1">source unit</param>
/// <param name="me2">target unit</param>
/// <returns></returns>
/// <exception cref="InvalidOperationException">iff units do not have the same dimension</exception>
public static decimal GetConversionFactor(this Mengeneinheit me1, Mengeneinheit me2)
{
#pragma warning disable 618
if (me1 == Mengeneinheit.ZERO || me2 == Mengeneinheit.ZERO)
#pragma warning restore 618
{
throw new InvalidOperationException("You must not use the artificial 'ZERO' value.");
}
if (me1 == me2)
{
return(1.0M);
}
if (!me1.IsConvertibleTo(me2))
{
throw new InvalidOperationException(
$"{me1} and {me2} are not convertible into each other because they don't share the same dimension.");
}
if ((int)me1 % (int)me2 == 0 || (int)me2 % (int)me2 == 0)
{
return((decimal)me1 / (decimal)me2);
}
throw new InvalidOperationException($"{me1} and {me2} are not (trivially) convertible into each other.");
}
/// <summary>
/// returns the factor that is needed to convert an amount in unit <paramref name="me1"/> to an equivalent amount in unit <paramref name="me2"/>.
/// </summary>
/// <param name="me1">source unit</param>
/// <param name="me2">target unit</param>
/// <returns></returns>
/// <exception cref="InvalidOperationException">iff units do not have the same dimension</exception>
public static decimal GetConversionFactor(this Mengeneinheit me1, Mengeneinheit me2)
{
if (me1 == me2)
{
return(1.0M);
}
if (!me1.IsConvertibleTo(me2))
{
throw new InvalidOperationException($"{me1} and {me2} are not convertible into each other because they don't share the same dimension.");
}
if ((int)me1 % (int)me2 == 0 || (int)me2 % (int)me2 == 0)
{
return((decimal)me1 / (decimal)me2);
}
else
{
throw new InvalidOperationException($"{me1} and {me2} are not (trivially) convertible into each other.");
}
}