/// <summary>
/// Returns true if the result is unique among the results so far received.
/// </summary>
/// <param name="obj">The object that is potentially to be added to the results collection.</param>
/// <returns>true if there is no object among the <see cref="IncomingResults"/> with the same <see cref="OwlInstanceSupertype.InstanceUri"/>.</returns>
private bool ObjectIsUniqueSoFar(OwlInstanceSupertype obj)
{
if (obj == null)
{
return(true);
}
return(IncomingResults
.Cast <OwlInstanceSupertype>()
.Where(o => o.InstanceUri == obj.InstanceUri)
.Count() == 0);
}
/// <summary>
/// A callback interface that gets called by SemWeb when results are sent
/// back from a remote SPARQL source. This gets each unique set of bindings
/// in turn. It can either store the results or deserialise them on the spot.
/// </summary>
/// <returns>true if the deserialiser was able to use the result or false otherwise</returns>
protected override void ProcessResult(SparqlResult result)
{
#region Tracing
#line hidden
if (Logger.IsDebugEnabled)
{
Logger.Debug("Got Result {0}.", result.ToString());
}
#line default
#endregion
if (IsSelectMember(SelectExpression))
{
IncomingResults.Add(ExtractMemberAccess(result));
return;
}
if (originalType == null)
{
throw new LinqToRdfException("need ontology type to create");
}
object t;
IEnumerable <MemberInfo> props = GetPropertiesToPopulate(originalType, instanceType);
if (originalType == instanceType)
{
#region not using a projection
t = Activator.CreateInstance(instanceType);
#region Tracing
#line hidden
if (Logger.IsDebugEnabled)
{
Logger.Debug("created new instance of {0}.", t.GetType().Name);
}
#line default
#endregion
AssignDataContext(t as OwlInstanceSupertype, DataContext);
AssignInstanceUri(t as OwlInstanceSupertype, InstanceName, result);
foreach (PropertyInfo pi in props)
{
if (pi.PropertyType.IsGenericType &&
pi.PropertyType.GetGenericTypeDefinition().Name.StartsWith("Entity"))
{
continue;
}
try
{
PopulateProperty(result, t, pi);
}
catch (ArgumentException ae)
{
#region Tracing
#line hidden
if (Logger.IsErrorEnabled)
{
Logger.ErrorEx("Unable to populate property " + pi.Name, ae);
Logger.Error("continuing");
}
#line default
#endregion
}
catch (Exception e)
{
#region Tracing
#line hidden
if (Logger.IsErrorEnabled)
{
Logger.ErrorEx("Unable to populate property " + pi.Name, e);
}
#line default
#endregion
return;
}
}
#endregion
}
else
{
#region using a projection
var args = new List <object>();
foreach (PropertyInfo pi in props)
{
try
{
if (result.HasValue(pi.Name))
{
if (result[pi.Name] != null)
{
string vVal = result[pi.Name].ToString();
vVal = RemoveEnclosingQuotesOnString(vVal, pi);
if (IsXsdtEncoded(vVal))
{
vVal = DecodeXsdtString(vVal);
}
args.Add(Convert.ChangeType(vVal, pi.PropertyType));
}
}
}
catch (Exception e)
{
Console.WriteLine(e);
return;
}
}
t = Activator.CreateInstance(instanceType, args.ToArray());
#endregion
}
if (Distinct)
{
if (ObjectIsUniqueSoFar(t as OwlInstanceSupertype))
{
IncomingResults.Add(t);
}
}
else
{
IncomingResults.Add(t);
}
return;
}