/// <summary>
/// Implementation of the visit function to generate some output, used in the visitor pattern
/// </summary>
/// <param name="node">The actual node which needs to be generated</param>
/// <param name="parent">The parent object of the node</param>
public override void Visit(OwlDatatypeProperty node, Object parent)
{
XmlElement parentElement = parent as XmlElement;
if (parentElement != null)
{
XmlElement propertyElement = _owlDocument.CreateElement("owl:DatatypeProperty", OwlNamespaceCollection.OwlNamespace);
// Add the name attribute to the node
AddNameAttribute(propertyElement, node);
// Generate all the edges going out of this node
if (!_visited.Contains(node))
{
VisitEdges(node, propertyElement);
}
// Attach the node eventually to its parent
parentElement.AppendChild(propertyElement);
_visited.Add(node);
}
}
/// <summary>
/// Adds an OWL Resource of type owl:DatatypeProperty to the graph</summary>
/// <param name="nodeUri">The Uri of the resource.</param>
/// <returns>Returns a reference to the newly added resource.</returns>
/// <exception cref="UriFormatException">The specified nodeUri is not a well formed Uri.</exception>
private OwlDatatypeProperty AddDatatypePropertyToGraph(string nodeUri)
{
//if the uri is null then create a blank node uri
if(nodeUri == null)
nodeUri = GetBlankNodeUri(null);
OwlNode node = (OwlNode)_owlGraph[nodeUri];
if((node != null) && (node is OwlDatatypeProperty))
return (OwlDatatypeProperty)node;
OwlNode typeNode = (OwlNode)_owlGraph.AddNode(OwlNamespaceCollection.OwlNamespace+"DatatypeProperty");
if(node == null)
{
node = new OwlDatatypeProperty(nodeUri,typeNode);
_owlGraph.AddEdge(((OwlDatatypeProperty)node).Type);
_owlGraph.AddNode(node);
return (OwlDatatypeProperty)node;
}
OwlDatatypeProperty newNode = new OwlDatatypeProperty(nodeUri,typeNode);
_owlGraph.AddEdge(newNode.Type);
MoveEdges(node, newNode);
_owlGraph.Nodes.Remove(node);
_owlGraph.AddNode(newNode);
return newNode;
}
/// <summary>
/// Parses the OWL syntax on an edge.
/// </summary>
/// <param name="node">The XML Node representing the OWL edge</param>
/// <param name="rEdge">The edge</param>
/// <param name="parentNode">The parent OWL node</param>
/// <returns>True if the edge was given an ID and attached to the parent node</returns>
private bool ParseEdgeSyntax(XmlNode node, OwlEdge rEdge, OwlNode parentNode)
{
//first get the NameSpace URI, NameSpace prefix and the LocalName for the node
String nameSpaceURI = node.NamespaceURI;
String nameSpacePrefix = node.Prefix;
String localName = node.LocalName;
if(IsNonSyntacticElement(node))
{
rEdge.ID = nameSpaceURI + localName;
if(rEdge.ID == (OwlNamespaceCollection.RdfNamespace + "type"))
{
OwlNode typeNode;
if(rEdge.ChildNode.ID == (OwlNamespaceCollection.OwlNamespace + "DatatypeProperty"))
{
typeNode = (OwlNode)_owlGraph.AddNode(OwlNamespaceCollection.OwlNamespace+"DatatypeProperty");
OwlDatatypeProperty newNode = new OwlDatatypeProperty(parentNode.ID,typeNode);
_owlGraph.AddEdge(newNode.Type);
MoveEdges(parentNode, newNode);
_owlGraph.Nodes.Remove(parentNode);
_owlGraph.AddNode(newNode);
rEdge.AttachParentNode(newNode);
return true;
}
if(rEdge.ChildNode.ID == (OwlNamespaceCollection.OwlNamespace + "ObjectProperty"))
{
typeNode = (OwlNode)_owlGraph.AddNode(OwlNamespaceCollection.OwlNamespace+"ObjectProperty");
OwlObjectProperty newNode = new OwlObjectProperty(parentNode.ID,typeNode);
_owlGraph.AddEdge(newNode.Type);
MoveEdges(parentNode, newNode);
_owlGraph.Nodes.Remove(parentNode);
_owlGraph.AddNode(newNode);
rEdge.AttachParentNode(newNode);
return true;
}
}
rEdge.AttachParentNode(parentNode);
return true;
}
if(IsSyntacticElement(node))
{
OnError("Cannot use " + node.Name + " as a property element");
return false;
}
// It is an instance of a property
rEdge.ID = nameSpaceURI + localName;
rEdge.AttachParentNode(parentNode);
return true;
// OnWarning("Unknown property element "+ node.Name);
// return false;
}
/// <summary>
/// Implementation of the visit function to generate some output, used in the visitor pattern
/// </summary>
/// <param name="node">The actual node which needs to be generated</param>
/// <param name="parent">The parent object of the node</param>
public override void Visit(OwlDatatypeProperty node, Object parent)
{
XmlElement parentElement = parent as XmlElement;
if(parentElement != null)
{
XmlElement propertyElement = _owlDocument.CreateElement("owl:DatatypeProperty", OwlNamespaceCollection.OwlNamespace);
// Add the name attribute to the node
AddNameAttribute(propertyElement, node);
// Generate all the edges going out of this node
if(!node.Visited)
{
VisitEdges(node, propertyElement);
}
// Attach the node eventually to its parent
parentElement.AppendChild(propertyElement);
node.Visited = true;
}
}
/// <summary> /// Implementation of the visit function to generate some output, used in the visitor pattern /// </summary> /// <param name="node">The actual node which needs to be generated</param> /// <param name="parent">The parent object of the node</param> public abstract void Visit(OwlDatatypeProperty node, Object parent);
/// <summary> /// Implementation of the visit function to generate some output, used in the visitor pattern /// </summary> /// <param name="node">The actual node which needs to be generated</param> /// <param name="parent">The parent object of the node</param> public abstract void Visit(OwlDatatypeProperty node, Object parent);