public void Init(XmlNode configNode)
{
if (configNode == null)
{
throw new ArgumentNullException("configNode");
}
XmlNodeList dataTypes = configNode.SelectNodes("./policyCombiningAlgorithm");
foreach (XmlNode node in dataTypes)
{
inf.IPolicyCombiningAlgorithm pca = (inf.IPolicyCombiningAlgorithm)Activator.CreateInstance(Type.GetType(node.Attributes["type"].Value));
_algorithms.Add(node.Attributes["id"].Value, pca);
}
}
/// <summary>
/// Process the match result.
/// </summary>
/// <param name="context">The evaluation context instance.</param>
/// <param name="targetEvaluationValue">The match evaluation result.</param>
private void ProcessTargetEvaluationValue(EvaluationContext context, TargetEvaluationValue targetEvaluationValue)
{
if (targetEvaluationValue == TargetEvaluationValue.Match)
{
try
{
context.Trace("Evaluating policies...");
context.AddIndent();
context.Trace("Policy combination algorithm: {0}", _policySet.PolicyCombiningAlgorithm);
// Evaluate all policies and apply rule combination
inf.IPolicyCombiningAlgorithm pca = EvaluationEngine.CreatePolicyCombiningAlgorithm(_policySet.PolicyCombiningAlgorithm);
if (pca == null)
{
throw new EvaluationException("the policy combining algorithm does not exists."); //TODO: resources
}
_evaluationValue = pca.Evaluate(context, _policies);
// Update the flags for general evaluation status.
context.TraceContextValues();
context.Trace("Policy combination algorithm: {0}", _evaluationValue.ToString());
}
finally
{
context.RemoveIndent();
}
}
else if (targetEvaluationValue == TargetEvaluationValue.NoMatch)
{
_evaluationValue = Decision.NotApplicable;
}
else if (targetEvaluationValue == TargetEvaluationValue.Indeterminate)
{
_evaluationValue = Decision.Indeterminate;
}
}