// Read in a (simplified) list of objects/interactions derived from the FOM
// Structure the data so that it is readily retrievable
/// <summary>
/// Create an HlaObject tree
/// </summary>
/// <param name="file">File containing the object model description</param>
/// <returns></returns>
public static HlaObjectNode CreateTree(StringReader file)
{
string line;
HlaObjectNode HlaObjectRoot = new HlaObjectNode(null, "HLAobjectRoot.");
HlaObjectNode HlaInteractionRoot = new HlaObjectNode(null, "HLAinteractionRoot.");
while ((line = file.ReadLine()) != null)
{
string[] s = line.Split('.');
switch (s[0])
{
case "HLAobjectRoot":
HlaObjectRoot.Add(line);
break;
case "HLAinteractionRoot":
HlaInteractionRoot.Add(line);
break;
default:
throw new ApplicationException("Corrupted datafile: Unknown root classname: " + s[0]);
}
}
file.Close();
return(HlaObjectRoot);
}
public HlaObjectNode(HlaObjectNode parent, string line )
{
Objects = new List<HlaObjectNode>();
Attributes = new List<string>();
// chop line; first element is our name
string[] s = line.Split('.');
// if there are < 2 elements that is an error
if (s.Count() < 2)
throw new ApplicationException("Line from " + parent.Name + " only has an attribute");
Parent = parent;
// our name is the first element
Name = s[0];
// If there are only 2 elements, the second may be an attribute
if (s.Count() == 2)
{
if (s[1] != "") // The Split() above will give use an empty string eg HLAobjectRoot. is [HLAobjectRoot] [] or a populated string
{
Attributes.Add(s[1]);
return;
}
return; // Not an attribute
}
// There are > 2 elements; s[1] is the next object name
HlaObjectNode nextObject;
if ((nextObject = Objects.Find(x => x.Name == s[1])) != null) // Check if we have seen the object before
nextObject.Add(line.Substring(Name.Length + 1));
else
Objects.Add(new HlaObjectNode(this, line.Substring(Name.Length + 1)));
}
/// <summary>
/// For a given fully qualified ObjectClassName find all of the attributes
/// </summary>
/// <param name="hlaTreeRoot">Root object (eg HLAobjectRoot) of the class namespace</param>
/// <param name="objectClassName">Fully qualified objectClassName</param>
/// <returns></returns>
public static List <string> FindAttributes(HlaObjectNode hlaTreeRoot, string objectClassName)
{
List <string> attribs = new List <string>();
// Walk down the tree from the root and find all attributes
string[] s = objectClassName.Split('.');
// s[0] should be the root object name
if (s[0] != hlaTreeRoot.Name)
{
throw new ApplicationException("ObjectClassName is not within the HlaTree: " + s[0]);
}
HlaObjectNode currentNode = hlaTreeRoot;
for (int i = 1; i < s.Length; i++) // start at 1 to skip root
{
// Walk the tree - we should never see a null unless there is an error
if ((currentNode = currentNode.Objects.Find(x => x.Name == s[i])) == null)
{
throw new ApplicationException("Tree walk error - node not in tree: " + s[i]);
}
}
// currentNode should now point to the HlaObject that has the object in it
while (currentNode != hlaTreeRoot)
{
// get the attributes
foreach (string attrib in currentNode.Attributes)
{
attribs.Add(attrib);
}
// walk backwards
currentNode = currentNode.Parent;
}
return(attribs);
}
