/// <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);
}
/// <summary>
/// Creates an Expression from a user-friendly representation of the expression. In that representation,
/// a macro is expressed with a leading "'μ", as in 'μPreviousComplete' ...
/// </summary>
/// <param name="uf">Thr user-friendly representation of the expression from which it will be created.</param>
/// <param name="directory">The directory into which the Expression Elements that are created from this
/// representation will be stored.</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 FromUf(string uf, ParticipantDirectory directory, object owner)
{
Expression expression = new Expression(owner);
expression.m_participantDirectory = directory;
int cursor = 0;
foreach (Match match in _singQuotes.Matches(uf))
{
if (match.Value.StartsWith(Macro.MACRO_START))
{
Macro macro = (Macro)directory[match.Value.Trim('\'')];
expression.m_elements.Add(macro);
cursor = match.Index + match.Value.Length;
}
else
{
expression.m_elements.Add(new RoteString(uf.Substring(cursor, (match.Index - cursor + 1))));
string token = match.Value.Substring(1, match.Value.Length - 2);
if (token.Contains("/"))
{
int slashNdx = token.IndexOf('/');
expression.m_elements.Add(directory.RegisterMapping(token.Substring(0, slashNdx)));
expression.m_elements.Add(new RoteString(token.Substring(slashNdx)));
cursor = match.Index + match.Value.Length - 1;
}
else
{
expression.m_elements.Add(directory.RegisterMapping(token));
expression.m_elements.Add(new RoteString(match.Value.Substring(match.Value.Length - 1, 1)));
cursor = match.Index + match.Value.Length;
}
}
}
if (cursor != uf.Length)
{
expression.m_elements.Add(new RoteString(uf.Substring(cursor)));
}
List <ExpressionElement> tmp = new List <ExpressionElement>(expression.m_elements);
expression.m_elements.Clear();
#region Consolidate sequential RoteString elements.
StringBuilder sb = new StringBuilder();
foreach (ExpressionElement ee in tmp)
{
if (!ee.GetType().Equals(typeof(RoteString)))
{
if (sb.Length > 0)
{
expression.m_elements.Add(new RoteString(sb.ToString()));
sb = new StringBuilder();
}
expression.m_elements.Add(ee);
}
else
{
sb.Append(ee);
}
}
if (sb.Length > 0)
{
expression.m_elements.Add(new RoteString(sb.ToString()));
}
#endregion
return(expression);
}
