/// <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(OwlCollection node, Object parent)
{
XmlElement parentElement = parent as XmlElement;
if (parentElement != null)
{
// Set the datatype property on its parent
XmlAttribute nameAttribute = _owlDocument.CreateAttribute("rdf", "parseType", OwlNamespaceCollection.RdfNamespace);
nameAttribute.Value = "Collection";
parentElement.Attributes.Append(nameAttribute);
IEnumerator e = node.GetEnumerator();
while (e.MoveNext())
{
OwlNode n = (OwlNode)e.Current;
n.Accept(this, parent);
}
}
}
/// <summary>
/// Builds an OWL Collection.
/// </summary>
/// <param name="propertyNode">The XML Node containing the children that will form the members of this list</param>
/// <returns>The head of the collection. This is the first member of the list or a nil node if the list is empty</returns>
private OwlCollection BuildCollection(XmlNode propertyNode)
{
// OwlNode rNode;
// OwlNode collHead = null;
// OwlEdge restEdge = null;
// OwlEdge firstEdge;
int count = propertyNode.ChildNodes.Count;
OwlCollection collection = new OwlCollection(GetBlankNodeUri(null));
for(int i=0;i<count;i++)
{
// //build the blank node that is a member of this list
// rNode = (OwlNode)_owlGraph.AddNode(GetBlankNodeUri(null));
// //if this is the first element of the cons list then set this as the head of the collection so we may return it later
// if(i == 0)
// collHead = rNode;
//
// //add an outgoing edge with name rdf:type from rdfNode to rdf:List
// OwlEdge typeEdge = new OwlEdge(OwlNamespaceCollection.RdfNamespace+"type");
// _owlGraph.AddEdge(typeEdge);
// OwlNode typeNode = (OwlNode)_owlGraph.AddNode(OwlNamespaceCollection.RdfNamespace+"List");
// rNode.AttachChildEdge(typeEdge);
// typeEdge.AttachChildNode(typeNode);
//
// //create a new first edge
// firstEdge = new OwlEdge(OwlNamespaceCollection.RdfNamespace+"first");
// rNode.AttachChildEdge(firstEdge);
// //add the first edge to the graph
// _owlGraph.AddEdge(firstEdge);
//
// OwlNode firstNode = (OwlNode)ProcessNode(propertyNode.ChildNodes[i],firstEdge);
OwlNode newNode = (OwlNode)ProcessNode(propertyNode.ChildNodes[i],null);
collection.Add(newNode);
// //OwlNode firstNode = tempNode;
// firstEdge.AttachChildNode(firstNode);
//
// if(restEdge != null)
// rNode.AttachParentEdge(restEdge);
//
// //make the new rest Edge
// restEdge = new OwlEdge(OwlNamespaceCollection.RdfNamespace+"rest");
// restEdge.AttachParentNode(rNode);
// //add the new RestEdge to the graph
// _owlGraph.AddEdge(restEdge);
}
// //ok we have exited the loop or bypassed it because there are no children
//
// rNode = (OwlNode)_owlGraph.AddNode(OwlNamespaceCollection.RdfNamespace+"nil");
// if(restEdge != null)
// rNode.AttachParentEdge(restEdge);
//
// if(collHead == null)
// collHead = rNode;
//
// return collHead;
return collection;
}
/// <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(OwlCollection node, Object parent)
{
XmlElement parentElement = parent as XmlElement;
if(parentElement != null)
{
// Set the datatype property on its parent
XmlAttribute nameAttribute = _owlDocument.CreateAttribute("rdf", "parseType", OwlNamespaceCollection.RdfNamespace);
nameAttribute.Value = "Collection";
parentElement.Attributes.Append(nameAttribute);
IEnumerator e = node.GetEnumerator();
while(e.MoveNext())
{
OwlNode n = (OwlNode)e.Current;
n.Accept(this, 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(OwlCollection 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(OwlCollection node, Object parent);
