/// <summary>
/// Invokes named rule specified by rule path.
/// </summary>
/// <typeparam name="T">Result type</typeparam>
/// <param name="rulePath">Path of the named rule</param>
/// <param name="arguments">Arguments required by the named rule</param>
/// <returns>Execution result, or default(T) if the rule does not exist</returns>
public T InvokeNamedRule <T>(string rulePath, Dictionary <string, object> arguments)
{
string rulePointPath;
string ruleName;
if (RulePathHelper.ExtractNamedRulePath(rulePath, out rulePointPath, out ruleName))
{
return(InvokeNamedRule <T>(rulePointPath, ruleName, arguments));
}
else
{
return(default(T));
}
}
/// <summary>
/// Gets a rule point by a given path.
/// </summary>
/// <param name="rulePointPath">The path of the rule point you want to get</param>
/// <returns>The rule point if it exists; otherwise, null.</returns>
public RulePoint GetRulePoint(string rulePointPath)
{
RulePoint iter = RootRulePoint;
string[] pathItems = RulePathHelper.GetRulePathComponents(rulePointPath);
foreach (string item in pathItems)
{
iter = iter.GetSubRulePoint(item);
if (iter == null)
{
return(null);
}
}
return(iter);
}
/// <summary>
/// Gets a named rule by a given path.
/// </summary>
/// <param name="rulePath">The path of the named rule you want to get</param>
/// <returns>The named rule if it exists; otherwise, null.</returns>
public NamedRule GetNamedRule(string rulePath)
{
if (String.IsNullOrEmpty(rulePath))
{
throw new ArgumentNullException("rulePath"); // NOXLATE
}
string rulePointPath;
string ruleName;
if (RulePathHelper.ExtractNamedRulePath(rulePath, out rulePointPath, out ruleName))
{
RulePoint theRulePoint = GetRulePoint(rulePointPath);
if (theRulePoint != null)
{
return(theRulePoint.GetNamedRule(ruleName));
}
}
return(null);
}
/// <summary>
/// Gets a rule point by a given path. Returns the lowest level sub rule point in
/// the heirarchy which has a valid activity defined.
/// </summary>
/// <param name="rulePointPath">The path of the rule point you want to get</param>
/// <returns>The lowest level rule point in the path that has an activity; otherwise, null.</returns>
public RulePoint GetRulePointWithActivity(string rulePointPath)
{
RulePoint activityPoint = null;
RulePoint iter = RootRulePoint;
string[] pathItems = RulePathHelper.GetRulePathComponents(rulePointPath);
foreach (string item in pathItems)
{
iter = iter.GetSubRulePoint(item);
if (iter == null)
{
return(activityPoint);
}
else if (iter.HasActivity)
{
activityPoint = iter;
}
}
return(activityPoint);
}
/// <summary>
/// Registers a new rule point with specified position.
/// </summary>
/// <param name="parentPath">A string representing the position where the rule point goes.</param>
/// <param name="name">The name of rule point.</param>
/// <param name="displayName">The display name of rule point.</param>
/// <param name="signature">The signature of rule point.</param>
public void RegisterRulePoint(string parentPath, string name, string displayName, RuleSignature signature)
{
RulePoint rulePoint = new RulePoint(this, name, signature, displayName);
// Create rule points recursively.
RulePoint iter = RootRulePoint;
string[] pathItems = RulePathHelper.GetRulePathComponents(parentPath);
foreach (string item in pathItems)
{
if (!iter.HasChild(item))
{
iter.AddRulePoint(new RulePoint(this, item));
}
iter = iter.GetSubRulePoint(item);
if (iter == null)
{
throw new InvalidOperationException(Properties.Resources.CannotRegisterRulePoint);
}
}
iter.AddRulePoint(rulePoint);
}
