private static Expression GetExpression <T>(Expression param, ListFilter filter)
{
var member = param;
member = filter.PropertyName.Split(".").Aggregate(member, Expression.Property); // takes X.X notation and gets to the nested property member
var propertyType = ((PropertyInfo)member.To <MemberExpression>().Member).PropertyType;
if (propertyType.GetInterface(nameof(IList)) != null)
{
var elementType = propertyType.GetTypeInfo().GenericTypeArguments[0];
return(filter.ORExpressions(f => GetListExpression <T>(elementType, member, f)));
}
if (propertyType.IsEnum || (propertyType.IsNullable() && Nullable.GetUnderlyingType(propertyType).IsEnum))
{
return(filter.ORExpressions(f => GetEnumExpression <T>(propertyType, member, f)));
}
return(filter.ORExpressions(f => GetStringExpression <T>(propertyType, member, f)));
}
