internal void ResolveUnknowns()
{
if (m_hasUnknowns)
{
List <ExpressionElement> temp = m_elements;
m_elements = new List <ExpressionElement>();
foreach (ExpressionElement ee in temp)
{
if (ee is UnknownReferenceElement)
{
Guid guid = ee.Guid;
if (m_participantDirectory.Contains(guid))
{
m_elements.Add(m_participantDirectory[guid]);
}
else
{
IPfcTransitionNode trans = m_owner as IPfcTransitionNode;
string msg;
if (trans != null)
{
msg = string.Format("Failed to map Guid {0} into an object on behalf of {1} in Pfc {2}.", guid, trans.Name, trans.Parent.Name);
}
else
{
msg = string.Format("Failed to map Guid {0} into an object on behalf of {1}.", guid, m_owner);
}
throw new ApplicationException(msg);
}
}
else
{
m_elements.Add(ee);
}
}
m_hasUnknowns = false;
}
}
/// <summary>
/// Creates an Expression from a user-hostile representation of the expression. In that representation,
/// we have guids and we have rote strings.
/// </summary>
/// <param name="uh">The user-hostile representation of the expression.</param>
/// <param name="directory">The directory from which the Expression Elements that are referenced here by guid, come.</param>
/// <param name="owner">The owner of the expression - usually, the Transition to which it is attached.</param>
/// <returns>The newly-created expression.</returns>
public static Expression FromUh(string uh, ParticipantDirectory directory, object owner)
{
Expression expression = new Expression(owner);
expression.m_participantDirectory = directory;
int cursor = 0;
foreach (Match match in _guidFinder.Matches(uh))
{
if (match.Index != cursor)
{
expression.m_elements.Add(new RoteString(uh.Substring(cursor, (match.Index - cursor))));
cursor = match.Index;
}
Guid guid = new Guid(match.Value);
cursor += match.Value.Length;
if (directory.Contains(guid))
{
expression.m_elements.Add(directory[guid]);
}
else
{
expression.m_elements.Add(new UnknownReferenceElement(guid));
expression.m_hasUnknowns = true;
}
}
if (cursor != uh.Length)
{
expression.m_elements.Add(new RoteString(uh.Substring(cursor)));
}
return(expression);
}
