/// <summary>
/// Builds up a constant expression that consists of the value that is mapped to the specified value.
/// </summary>
/// <param name="current">The expression that represents the current element of the collection.</param>
/// <param name="value">The evaluatee.</param>
/// <returns>The constant expression that consists of the value that is mapped to the specified value.</returns>
public override Operand Evaluate(Expression current, string value)
{
Logger.Info("Evaluating the specified value '{0}'.", value ?? "null");
if (value == null)
{
throw new ArgumentNullException("value");
}
if (!evaluators.ContainsKey(value.ToUpperInvariant()))
{
Logger.Verbose("Ignored the specified value because this didn't match any registered variable names.");
return(null);
}
var eval = evaluators[value.ToUpperInvariant()];
Logger.Verbose("Evaluated as '{0} : {1}'.", eval.ToString(), eval.GetType().FullName);
return(builder.BuildUp(eval()));
}
/// <summary>
/// Builds up a constant expression that consists of the value that is mapped to the specified value.
/// </summary>
/// <param name="current">The expression that represents the current element of the collection.</param>
/// <param name="value">The evaluatee.</param>
/// <returns>The constant expression that consists of the value that is mapped to the specified value.</returns>
public override Operand Evaluate(Expression current, string value)
{
Logger.Info("Evaluating the specified value '{0}'.", value ?? "null");
if (value == null)
{
throw new ArgumentNullException("value");
}
foreach (var eval in evaluators)
{
var match = eval.Key.Match(value);
if (match.Success)
{
var result = eval.Value(match);
Logger.Verbose("Evaluated as '{0} : {1}'.", result.ToString(), result.GetType().FullName);
return(builder.BuildUp(result));
}
}
Logger.Verbose("Ignored the specified value because this didn't match any registered patterns.");
return(null);
}