/// <summary>
/// Constructs a NodeId from the BrowseName of an internal node.
/// </summary>
/// <param name="browseName">The browse name.</param>
/// <param name="namespaceIndex">Index of the namespace.</param>
/// <returns>The node id.</returns>
public static NodeId ConstructIdForInternalNode(QualifiedName browseName, ushort namespaceIndex)
{
ParsedNodeId parsedNodeId = new ParsedNodeId();
parsedNodeId.RootId = browseName.Name;
parsedNodeId.NamespaceIndex = namespaceIndex;
parsedNodeId.RootType = InternalNode;
return(parsedNodeId.Construct());
}
/// <summary>
/// Constructs a NodeId from the ItemId for a DA branch.
/// </summary>
/// <param name="itemId">The item id.</param>
/// <param name="propertyId">The property id.</param>
/// <param name="namespaceIndex">Index of the namespace.</param>
/// <returns>The node id.</returns>
public static NodeId ConstructIdForDaElement(string itemId, int propertyId, ushort namespaceIndex)
{
ParsedNodeId parsedNodeId = new ParsedNodeId();
parsedNodeId.RootId = itemId;
parsedNodeId.NamespaceIndex = namespaceIndex;
parsedNodeId.RootType = DaElement;
if (propertyId >= 0)
{
parsedNodeId.PropertyId = propertyId;
parsedNodeId.RootType = DaProperty;
}
return(parsedNodeId.Construct());
}
/// <summary>
/// Parses the specified node identifier.
/// </summary>
/// <param name="nodeId">The node identifier.</param>
/// <returns>The parsed node identifier. Null if the identifier cannot be parsed.</returns>
public static new ParsedNodeId Parse(NodeId nodeId)
{
// can only parse non-null string node identifiers.
if (NodeId.IsNull(nodeId))
{
return(null);
}
string identifier = nodeId.Identifier as string;
if (String.IsNullOrEmpty(identifier))
{
return(null);
}
ParsedNodeId parsedNodeId = new ParsedNodeId();
parsedNodeId.NamespaceIndex = nodeId.NamespaceIndex;
// extract the type of identifier.
parsedNodeId.RootType = 0;
int start = 0;
for (int ii = 0; ii < identifier.Length; ii++)
{
if (!Char.IsDigit(identifier[ii]))
{
start = ii;
break;
}
parsedNodeId.RootType *= 10;
parsedNodeId.RootType += (byte)(identifier[ii] - '0');
}
if (start >= identifier.Length || identifier[start] != ':')
{
return(null);
}
// extract any component path.
StringBuilder buffer = new StringBuilder();
int index = start + 1;
int end = identifier.Length;
bool escaped = false;
while (index < end)
{
char ch = identifier[index++];
// skip any escape character but keep the one after it.
if (ch == '&')
{
escaped = true;
continue;
}
if (!escaped && ch == '?')
{
end = index;
break;
}
buffer.Append(ch);
escaped = false;
}
// extract any component.
parsedNodeId.RootId = buffer.ToString();
parsedNodeId.ComponentPath = null;
if (parsedNodeId.RootType == ModelUtils.DaProperty)
{
// must have the property id.
if (end >= identifier.Length)
{
return(null);
}
// extract the property id.
for (int ii = end; ii < identifier.Length; ii++)
{
end++;
if (!Char.IsDigit(identifier[ii]))
{
// check for terminator.
if (identifier[ii] != ':')
{
return(null);
}
break;
}
parsedNodeId.PropertyId *= 10;
parsedNodeId.PropertyId += (byte)(identifier[ii] - '0');
}
}
// extract the component path.
if (end < identifier.Length)
{
parsedNodeId.ComponentPath = identifier.Substring(end);
}
return(parsedNodeId);
}
