/// <summary>
/// Creates and configures the shared variables specified in the provided XML document for the specified blackboard
/// </summary>
/// <param name="doc">XML document which contains shared variables initialization data</param>
/// <param name="blackboard">Blackboard object in which the shared variables will be configured</param>
private static void SetupSharedVariables(XmlDocument doc, Blackboard blackboard)
{
if ((doc == null) || (blackboard == null))
throw new ArgumentNullException();
if (blackboard.virtualModule == null)
throw new Exception("Uninitialized blackboard");
int i, j;
ILogWriter log;
XmlDocument tmpDoc;
XmlNode node;
XmlNodeList xmlVarList;
XmlNodeList xmlWriterModuleList;
SharedVariable shVar;
List<string> writers;
string shVarName;
string shVarType;
string shVarValue;
bool shVarIsArray;
int bracketPos;
log = blackboard.log;
tmpDoc = new XmlDocument();
if (doc.GetElementsByTagName("sharedVariables").Count < 1)
{
log.WriteLine(1, "No shared variables was defined in XML file.");
return;
}
tmpDoc.LoadXml(doc.GetElementsByTagName("sharedVariables")[0].OuterXml);
#region Load of shared variables
// Load of shared variables
log.WriteLine(1, "Reading shared variables");
xmlVarList = tmpDoc.GetElementsByTagName("var");
for (i = 0; i < xmlVarList.Count; ++i)
{
#region Get variable Name
node = xmlVarList[i];
if ((node == null) || (node.Name != "var") || (node.Attributes["name"] == null))
continue;
shVarName = node.Attributes["name"].InnerText;
shVarType = (node.Attributes["type"] != null) ? node.Attributes["type"].InnerText : "var";
if (String.IsNullOrEmpty(shVarType) || !SharedVariable.RxVarTypeValidator.IsMatch(shVarType))
shVarType = "var";
bracketPos = shVarType.IndexOf("[");
if (shVarIsArray = (bracketPos != -1))
shVarType = shVarType.Remove(bracketPos);
if (blackboard.VirtualModule.SharedVariables.Contains(shVarName))
{
log.WriteLine(2, "Error loading shared variable " + shVarName + ". Variable already exists.");
continue;
}
#endregion
#region Get variable initial value
shVarValue = "";
if (node.Attributes["value"] != null)
{
shVarValue = node.Attributes["value"].Value;
}
else if (node.Attributes["fromFile"] != null)
{
shVarValue = node.Attributes["fromFile"].Value;
if (File.Exists(shVarValue))
{
try
{
shVarValue = File.ReadAllText(shVarValue);
}
catch
{
log.WriteLine(2, "Error loading variable content from file " + shVarValue + " for the shared variable " + shVarName + ". Variable was set to null");
shVarValue = "";
}
}
}
#endregion
#region Get list of modules with write permission
writers = new List<string>();
tmpDoc = new XmlDocument();
tmpDoc.LoadXml(node.OuterXml);
xmlWriterModuleList = tmpDoc.GetElementsByTagName("writers");
if (xmlWriterModuleList.Count == 1)
{
writers.Add(blackboard.VirtualModule.Name);
tmpDoc = new XmlDocument();
tmpDoc.LoadXml(xmlWriterModuleList[0].OuterXml);
xmlWriterModuleList = tmpDoc.GetElementsByTagName("writer");
for (j = 0; j < xmlWriterModuleList.Count; ++j)
{
node = xmlWriterModuleList[j];
if (node.InnerText == "*")
{
writers.Clear();
writers.Add("*");
break;
}
if (!blackboard.modules.Contains(node.InnerText))
continue;
else
writers.Add(node.InnerText);
/*
if (!writers.Contains(node.InnerText))
writers.Add(node.InnerText);
*/
}
}
else
writers.Add("*");
#endregion
#region Create and add the shared variable
shVar = new SharedVariable(blackboard.VirtualModule, shVarType, shVarName, shVarIsArray, -1);
//shVar.Data = shVarValue;
shVar.WriteStringData(blackboard.VirtualModule, shVarType, -1, shVarValue);
writers.Sort();
shVar.AllowedWriters = writers;
blackboard.VirtualModule.SharedVariables.Add(shVar);
log.WriteLine(4, "Added shared variable " + shVarType +" "+ shVarName);
#endregion
}
#endregion
}
