private DamlRestriction[] GetRestrictions(string strOwnerName)
{
ArrayList lstRestrictions = new ArrayList();
XmlNode root = m_doc.DocumentElement;
string strXPath = DamlConstants.DAML_CLASS + "[@" + DamlConstants.RDF_ID + "='" + strOwnerName + "']" + "/" + DamlConstants.RDFS_SUBCLASSOF + "/" + DamlConstants.DAML_RESTRICTION;
XmlNodeList lstNodes = root.SelectNodes(strXPath, m_mgr);
if (lstNodes.Count == 0)
{
return((DamlRestriction[])lstRestrictions.ToArray(typeof(DamlRestriction)));
}
foreach (XmlNode restrictionNode in lstNodes)
{
// Create a daml restriction
DamlRestriction res = GetRestrictionNodeData(restrictionNode);
res.Owner = strOwnerName;
// Add it to our list of restrictions
lstRestrictions.Add(res);
}
return((DamlRestriction[])lstRestrictions.ToArray(typeof(DamlRestriction)));
}
private DamlRestriction GetRestrictionNodeData(XmlNode restrictionNode)
{
if (restrictionNode == null)
{
throw new ArgumentNullException("restriction", "Node cannnot be null");
}
DamlRestriction res = new DamlRestriction();
// Restriction nodes may specify a cardinality
if (restrictionNode.Attributes.Count > 0)
{
XmlAttribute cardinalityAtt = restrictionNode.Attributes[DamlConstants.DAML_CARDINALITY];
if (cardinalityAtt != null)
{
res.Cardinality = int.Parse(cardinalityAtt.Value);
}
}
// Find the property which this restriction applies to
XmlNode onPropertyNode = restrictionNode.SelectSingleNode(DamlConstants.DAML_ON_PROPERTY, m_mgr);
if (onPropertyNode != null)
{
res.OnProperty = onPropertyNode.Attributes[DamlConstants.RDF_RESOURCE].Value;
}
XmlNode hasValueNode = restrictionNode.SelectSingleNode(DamlConstants.DAML_HAS_VALUE, m_mgr);
if (hasValueNode != null)
{
res.HasValue = hasValueNode.Attributes[DamlConstants.RDF_ID].Value;
}
return(res);
}
/// <summary>
/// Function compares 2 DamlRestriction instances. The OnProperty property
/// is used for comparisons.
/// </summary>
/// <param name="obj"></param>
/// <returns>0 (equal), -1 (less than this instance)
/// or 1 (greater than this instance)</returns>
public int CompareTo(object obj)
{
DamlRestriction temp = (DamlRestriction)obj;
return(this.m_strOnProperty.ToLower().CompareTo(temp.m_strOnProperty.ToLower()));
}