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);
}
/// <summary>
/// Binds a root path segment.
/// </summary>
/// <param name="segmentToken">The segment to bind.</param>
/// <returns>The bound node.</returns>
private QueryNode BindRootSegment(SegmentQueryToken segmentToken)
{
Debug.Assert(segmentToken != null, "segmentToken != null");
Debug.Assert(segmentToken.Parent == null, "Only root segments should be allowed here.");
Debug.Assert(!string.IsNullOrEmpty(segmentToken.Name), "!string.IsNullOrEmpty(segmentToken.Name)");
//// This is a metadata-only version of the RequestUriProcessor.CreateFirstSegment.
if (segmentToken.Name == UriQueryConstants.MetadataSegment)
{
// TODO: $metadata segment parsing - no key values are allowed.
throw new NotImplementedException();
}
if (segmentToken.Name == UriQueryConstants.BatchSegment)
{
// TODO: $batch segment parsing - no key values are allowed.
throw new NotImplementedException();
}
// TODO: WCF DS checks for $count here first and fails. But not for the other $ segments.
// which means other $segments get to SO resolution. On the other hand the WCF DS would eventually fail if an SO started with $.
// Look for a service operation
IEdmFunctionImport serviceOperation = this.model.TryResolveServiceOperation(segmentToken.Name);
if (serviceOperation != null)
{
return this.BindServiceOperation(segmentToken, serviceOperation);
}
// TODO: Content-ID reference resolution. Do we actually do anything here or do we perform this through extending the metadata binder?
// Look for an entity set.
IEdmEntitySet entitySet = this.model.TryResolveEntitySet(segmentToken.Name);
if (entitySet == null)
{
throw new ODataException(Strings.MetadataBinder_RootSegmentResourceNotFound(segmentToken.Name));
}
EntitySetQueryNode entitySetQueryNode = new EntitySetQueryNode()
{
EntitySet = entitySet
};
if (segmentToken.NamedValues != null)
{
return this.BindKeyValues(entitySetQueryNode, segmentToken.NamedValues);
}
return entitySetQueryNode;
}
/// <summary> /// Translates an entity set node. /// </summary> /// <param name="entitySetNode">The entity set query node to translate.</param> /// <returns>Expression which evaluates to IQueryable<T> where T is the InstanceType of the type of the entity set.</returns> protected abstract Expression TranslateEntitySet(EntitySetQueryNode entitySetNode);
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;
}
