public void WithCellValueMappers_ValidMappers_ThrowsArgumentNullException()
{
SingleExcelPropertyMap <string> propertyMap = Map(t => t.Value);
ICellValueMapper mapper1 = Assert.Single(propertyMap.CellValueMappers);
ICellValueMapper mapper2 = new BoolMapper();;
Assert.Same(propertyMap, propertyMap.WithCellValueMappers(mapper2));
Assert.Equal(new ICellValueMapper[] { mapper1, mapper2 }, propertyMap.CellValueMappers);
}
/// <summary>
/// Adds the given mapper to the pipeline of cell value mappers.
/// </summary>
/// <param name="mapper">The mapper to add.</param>
public void AddCellValueMapper(ICellValueMapper mapper)
{
if (mapper == null)
{
throw new ArgumentNullException(nameof(mapper));
}
_cellValueMappers.Add(mapper);
}
private static bool AutoMap(this Type memberType, FallbackStrategy emptyValueStrategy, out ICellValueMapper mapper, out IFallbackItem emptyFallback, out IFallbackItem invalidFallback)
{
Type type = memberType.GetNullableTypeOrThis(out bool isNullable);
Type[] interfaces = type.GetTypeInfo().ImplementedInterfaces.ToArray();
IFallbackItem ReconcileFallback(FallbackStrategy strategyToPursue, bool empty)
{
// Empty nullable values should be set to null.
if (empty && isNullable)
{
return(new FixedValueFallback(null));
}
else if (strategyToPursue == FallbackStrategy.SetToDefaultValue || emptyValueStrategy == FallbackStrategy.SetToDefaultValue)
{
return(new FixedValueFallback(type.DefaultValue()));
}
else
{
Debug.Assert(emptyValueStrategy == FallbackStrategy.ThrowIfPrimitive);
// The user specified that we should set to the default value if it was empty.
return(new ThrowFallback());
}
}
if (type == typeof(DateTime))
{
mapper = new DateTimeMapper();
emptyFallback = ReconcileFallback(FallbackStrategy.ThrowIfPrimitive, empty: true);
invalidFallback = ReconcileFallback(FallbackStrategy.ThrowIfPrimitive, empty: false);
}
else if (type == typeof(bool))
{
mapper = new BoolMapper();
emptyFallback = ReconcileFallback(FallbackStrategy.ThrowIfPrimitive, empty: true);
invalidFallback = ReconcileFallback(FallbackStrategy.ThrowIfPrimitive, empty: false);
}
else if (type.GetTypeInfo().IsEnum)
{
mapper = new EnumMapper(type);
emptyFallback = ReconcileFallback(FallbackStrategy.ThrowIfPrimitive, empty: true);
invalidFallback = ReconcileFallback(FallbackStrategy.ThrowIfPrimitive, empty: false);
}
else if (type == typeof(string) || type == typeof(object) || type == typeof(IConvertible))
{
mapper = new StringMapper();
emptyFallback = ReconcileFallback(FallbackStrategy.SetToDefaultValue, empty: true);
invalidFallback = ReconcileFallback(FallbackStrategy.SetToDefaultValue, empty: false);
}
else if (type == typeof(Uri))
{
mapper = new UriMapper();
emptyFallback = ReconcileFallback(FallbackStrategy.SetToDefaultValue, empty: true);
invalidFallback = ReconcileFallback(FallbackStrategy.ThrowIfPrimitive, empty: false);
}
else if (interfaces.Any(t => t == typeof(IConvertible)))
{
mapper = new ChangeTypeMapper(type);
emptyFallback = ReconcileFallback(FallbackStrategy.ThrowIfPrimitive, empty: true);
invalidFallback = ReconcileFallback(FallbackStrategy.ThrowIfPrimitive, empty: false);
}
else
{
mapper = null;
emptyFallback = null;
invalidFallback = null;
return(false);
}
return(true);
}
