private void Build(string projection, Type type, IList sourceList)
{
// TODO: Static registry!
// TODO: Ovveride value ranges.
string[] parts = projection.Split(new[] { '.' });
var accessorList = new List<IPropertyOrFieldAccessor>(parts.Length);
Type currentType = type;
char? postfix = null;
for (int idx = 0; idx < parts.Length; idx++)
{
string part = parts[idx];
if (string.IsNullOrEmpty(part))
{
throw GetPartNotFoundEx(projection);
}
if (idx == parts.Length - 1)
{
part = FeatureHelpers.GetID(part, out postfix);
}
if (string.IsNullOrEmpty(part))
{
throw GetPartNotFoundEx(projection);
}
IPropertyOrFieldAccessor cacc;
try
{
MemberInfo cmi = currentType.GetProperty(part);
cacc = AccessorFactory.CreatePropertyOrFieldAccessor(cmi);
}
catch (Exception ex)
{
throw new InvalidOperationException(
string.Format("Property '{0}' not found or cannot be accessed on type '{1}'. See inner exception for details.", part, currentType.Name), ex);
}
accessorList.Add(cacc);
currentType = cacc.PropertyOrFieldType;
}
// Ok. Accessors found.
accessors = accessorList.ToArray();
Debug.Assert(accessors.Length > 0);
// Create Description:
char? foo;
string id = FeatureHelpers.GetID(projection, out foo);
try
{
switch (postfix)
{
case '<':
case '>':
Description = new SetFeatureDescription(id, postfix == '>', GetDistinctValues(sourceList, id));
break;
case '#':
Description = CreateBinaryFeatureDescription(id, sourceList);
break;
default:
Description = new ValueFeatureDescription(id, GetMinMaxRange(sourceList, id));
break;
}
}
catch (Exception ex)
{
throw new InvalidOperationException(
string.Format("Cannot initialize feature description by id '{0}'. See inner exception for details.", id), ex);
}
// Done.
}
internal ValueFeature(ValueFeatureDescription description, double? value)
: base(description, value != null ? description.OriginalValueRange.Cut(value.Value) : value)
{
Contract.Requires(description != null);
}