public void ProcessQuery(QueryDescriptorQueryNode query)
{
_sparqlModel = new SparqlModel();
switch (query.Query.Kind)
{
case QueryNodeKind.EntitySet:
ProcessNode(query.Query as EntitySetQueryNode);
break;
case QueryNodeKind.KeyLookup:
ProcessRoot(query.Query as KeyLookupQueryNode);
break;
case QueryNodeKind.Filter:
var entityType = (query.Query as FilterQueryNode).ItemType;
var instances = AssertInstancesVariable(entityType);
_entitySetVariable = instances;
ProcessFilter(query.Query as FilterQueryNode);
_sparqlModel.AddSelectVariable(instances, entityType.FullName(), true);
_sparqlModel.IsDescribe = true;
break;
case QueryNodeKind.Top:
case QueryNodeKind.Skip:
ProcessNode(query.Query);
break;
case QueryNodeKind.Segment:
var navigation = query.Query as NavigationPropertyNode;
var finalVar = ProcessNode(navigation);
_sparqlModel.AddSelectVariable(
finalVar.ToString(),
navigation.TypeReference.FullName(),
navigation.NavigationProperty.OwnMultiplicity() == EdmMultiplicity.Many);
_sparqlModel.IsDescribe = true;
break;
default:
throw new NotImplementedException("No processing implemented for " + query.Query.Kind);
}
// Apply page size limit
if (!_sparqlModel.Limit.HasValue || _sparqlModel.Limit.Value > _maxPageSize)
{
_sparqlModel.OriginalLimit = _sparqlModel.Limit;
_sparqlModel.Limit = _maxPageSize;
}
}
public void ProcessQuery(QueryDescriptorQueryNode query)
{
_sparqlModel = new SparqlModel();
switch (query.Query.Kind)
{
case QueryNodeKind.EntitySet:
ProcessNode(query.Query as EntitySetQueryNode);
break;
case QueryNodeKind.KeyLookup:
ProcessRoot(query.Query as KeyLookupQueryNode);
break;
case QueryNodeKind.Filter:
var entityType = (query.Query as FilterQueryNode).ItemType;
var instances = AssertInstancesVariable(entityType);
_entitySetVariable = instances;
ProcessFilter(query.Query as FilterQueryNode);
_sparqlModel.AddSelectVariable(instances, entityType.FullName(), true);
_sparqlModel.IsDescribe = true;
break;
case QueryNodeKind.Top:
case QueryNodeKind.Skip:
ProcessNode(query.Query);
break;
case QueryNodeKind.Segment:
var navigation = query.Query as NavigationPropertyNode;
var finalVar = ProcessNode(navigation);
_sparqlModel.AddSelectVariable(
finalVar.ToString(),
navigation.TypeReference.FullName(),
navigation.NavigationProperty.OwnMultiplicity() == EdmMultiplicity.Many);
_sparqlModel.IsDescribe = true;
break;
default:
throw new NotImplementedException("No processing implemented for " + query.Query.Kind);
}
// Apply page size limit
if (!_sparqlModel.Limit.HasValue || _sparqlModel.Limit.Value > _maxPageSize)
{
_sparqlModel.OriginalLimit = _sparqlModel.Limit;
_sparqlModel.Limit = _maxPageSize;
}
}
private string ProcessNode(EntitySetQueryNode entitySet)
{
var entitySetType = _map.GetUriForType(entitySet.EntitySet.ElementType.FullName());
if (entitySetType == null)
{
// Throw exception
}
var instancesVariable = _sparqlModel.NextVariable();
_sparqlModel.RootGraphPattern.Add(
new TriplePattern(
new VariablePatternItem(instancesVariable),
new UriPatternItem("http://www.w3.org/1999/02/22-rdf-syntax-ns#type"),
new UriPatternItem(entitySetType)
));
_sparqlModel.AddSelectVariable(instancesVariable, entitySet.ItemType.FullName(), true);
_sparqlModel.IsDescribe = true;
return(instancesVariable);
}
