/// <summary>
/// allows reuse of builder instance by starting a new empty ReplacementRule
/// </summary>
/// <returns>builder instance</returns>
public ReplacementRuleBuilder Reset()
{
// already good to go!
if (currentState == State.Start)
{
return(this);
}
if (currentState != State.End)
{
throw new InvalidOperationException("Reset() should only be called on a Builder in [End] State! (did you forget to GetResult()?)");
}
result = new ReplacementRule();
currentPatternVertex = null;
currentReplacementVertex = null;
currentReplacementEdge = null;
currentPatternEdge = null;
taggedPatternVertices.Clear();
taggedReplacementVertices.Clear();
freezeState = false;
lastValidState = State.Start;
currentState = State.Start;
return(this);
}
/// <summary>
/// basic constructor - initializes attributes and state
/// </summary>
public ReplacementRuleBuilder()
{
currentState = State.Start;
result = new ReplacementRule();
taggedPatternVertices = new Dictionary <string, Vertex>();
taggedReplacementVertices = new Dictionary <string, Vertex>();
}
