/// <summary>
/// Composes another <see cref="ValueConverter" /> instance with this one such that
/// the result of the first conversion is used as the input to the second conversion.
/// </summary>
/// <param name="secondConverter"> The second converter. </param>
/// <returns> The composed converter. </returns>
public virtual ValueConverter ComposeWith(
[CanBeNull] ValueConverter secondConverter)
{
if (secondConverter == null)
{
return(this);
}
if (StoreType.UnwrapNullableType() != secondConverter.ModelType.UnwrapNullableType())
{
throw new ArgumentException(
CoreStrings.ConvertersCannotBeComposed(
ModelType.ShortDisplayName(),
StoreType.ShortDisplayName(),
secondConverter.ModelType.ShortDisplayName(),
secondConverter.StoreType.ShortDisplayName()));
}
var firstConverter
= StoreType.IsNullableType() &&
!secondConverter.ModelType.IsNullableType()
? ComposeWith(
(ValueConverter)Activator.CreateInstance(
typeof(CastingConverter <,>).MakeGenericType(
StoreType,
secondConverter.ModelType),
MappingHints))
: this;
return((ValueConverter)Activator.CreateInstance(
typeof(CompositeValueConverter <, ,>).MakeGenericType(
firstConverter.ModelType,
firstConverter.StoreType,
secondConverter.StoreType),
firstConverter,
secondConverter,
firstConverter.MappingHints.With(secondConverter.MappingHints)));
}
