private static IExcelToEnumerableOptions <T> BuildOptions <T>(Action <ExcelToEnumerableOptionsBuilder <T> > options)
{
var optionsBuilder = new ExcelToEnumerableOptionsBuilder <T>();
options?.Invoke(optionsBuilder);
return(optionsBuilder.Build());
}
internal static void AddOptionsFromAttributes(ExcelToEnumerableOptionsBuilder <T> builder, Type type)
{
MapClassLevelAttributes(builder, type);
var properties = type.GetProperties().Distinct().ToArray();
foreach (var property in properties)
{
var propertyAttributes = property.CustomAttributes.ToArray();
foreach (var propertyAttribute in propertyAttributes)
{
switch (propertyAttribute.AttributeType.Name)
{
case nameof(MapsToColumnNumberAttribute):
var columnNumber = (int)propertyAttribute.ConstructorArguments[0].Value;
ExcelPropertyConfiguration.MapsToColumnNumber(columnNumber, property.Name, builder._options);
break;
case nameof(MapsToColumnLetterAttribute):
var columnLetter = (string)propertyAttribute.ConstructorArguments[0].Value;
ExcelPropertyConfiguration.MapsToColumnNumber(CellRef.ColumnNameToNumber(columnLetter),
property.Name, builder._options);
break;
case nameof(OptionalColumnAttribute):
ExcelPropertyConfiguration.OptionalColumn(true, property.Name, builder._options);
break;
case nameof(MapFromColumnsAttribute):
var columnNames =
((ReadOnlyCollection <CustomAttributeTypedArgument>)propertyAttribute
.ConstructorArguments[0].Value).Select(x => x.Value.ToString());
ExcelPropertyConfiguration.MapFromColumns(columnNames, property.Name, builder._options);
break;
case nameof(MapsToColumnNamedAttribute):
var columnName = (string)propertyAttribute.ConstructorArguments[0].Value;
ExcelPropertyConfiguration.MapsToColumnNamed(columnName, property.Name, builder._options);
break;
case nameof(IgnoreColumnAttribute):
ExcelPropertyConfiguration.Ignore(property.Name, builder._options);
break;
case nameof(MapsToRowNumberAttribute):
ExcelPropertyConfiguration.MapsToRowNumber(property.Name, builder._options);
break;
case nameof(ShouldBeLessThanAttribute):
var maxValue = (double)propertyAttribute.ConstructorArguments[0].Value;
ExcelPropertyConfiguration.ShouldBeLessThan(maxValue, property.Name, builder._options);
break;
case nameof(ShouldBeGreaterThanAttribute):
var minValue = (double)propertyAttribute.ConstructorArguments[0].Value;
ExcelPropertyConfiguration.ShouldBeGreaterThan(minValue, property.Name, builder._options);
break;
case nameof(NotNullAttribute):
ExcelPropertyConfiguration.NotNullProperties(property.Name, builder._options);
break;
case nameof(ShouldBeOneOfAttribute):
// CSH 27112020 We're adding a validator directly here, rather than going via the static ExcelPropertyConfiguration because the validator we're using here using
// an enumerable of type object rather than type TProperty (since enforcing argument types at compile time is not possible with Attributes)
var objectList =
((ReadOnlyCollection <CustomAttributeTypedArgument>)propertyAttribute
.ConstructorArguments[0].Value).Select(x => x.Value);
builder._options.Validations[property.Name]
.Add(ExcelCellValidatorFactory.CreateShouldBeOneOf(objectList));
break;
case nameof(UniqueAttribute):
ExcelPropertyConfiguration.Unique(property.Name, builder._options);
break;
case nameof(RequiredColumnAttribute):
ExcelPropertyConfiguration.RequiredColumn(true, property.Name, builder._options);
break;
}
}
}
}
private static void MapClassLevelAttributes(ExcelToEnumerableOptionsBuilder <T> builder,
Type type)
{
var attributes = type.CustomAttributes;
foreach (var attribute in attributes)
{
switch (attribute.AttributeType.Name)
{
case nameof(AllPropertiesMustBeMappedToColumnsAttribute):
builder.AllPropertiesMustBeMappedToColumns((bool)attribute.ConstructorArguments[0].Value);
break;
case nameof(AllColumnsMustBeMappedToPropertiesAttribute):
builder.AllColumnsMustBeMappedToProperties((bool)attribute.ConstructorArguments[0].Value);
break;
case nameof(UsingHeaderNamesAttribute):
builder.UsingHeaderNames((bool)attribute.ConstructorArguments[0].Value);
break;
case nameof(StartingFromRowAttribute):
var rowNumber = (int)attribute.ConstructorArguments[0].Value;
builder.StartingFromRow(rowNumber);
break;
case nameof(UsingSheetAttribute):
var sheetArgument = attribute.ConstructorArguments[0].Value;
if (sheetArgument is int argument)
{
builder.UsingSheet(argument);
}
else
{
builder.UsingSheet(sheetArgument.ToString());
}
break;
case nameof(HeaderOnRowAttribute):
var headerOnRowNumber = (int)attribute.ConstructorArguments[0].Value;
builder.HeaderOnRow(headerOnRowNumber);
break;
case nameof(EndingWithRowAttribute):
builder.EndingWithRow((int)attribute.ConstructorArguments[0].Value);
break;
case nameof(AggregateExceptionsAttribute):
builder.AggregateExceptions();
break;
case nameof(BlankRowBehaviourAttribute):
builder.BlankRowBehaviour((BlankRowBehaviour)attribute.ConstructorArguments[0].Value);
break;
case nameof(RelaxedNumberMatchingAttribute):
builder.RelaxedNumberMatching((bool)attribute.ConstructorArguments[0].Value);
break;
}
}
}
