/// <summary>
/// Creates a new instance of the evaluaion context.
/// </summary>
/// <param name="engine">The engine instance.</param>
/// <param name="policyDocument">The policy document instance.</param>
/// <param name="contextDocument">The context document instance.</param>
public EvaluationContext(EvaluationEngine engine, pol.PolicyDocument policyDocument, ctx.ContextDocument contextDocument)
: this()
{
ctx.AttributeReadWriteCollection attributes = new ctx.AttributeReadWriteCollection();
foreach (ctx.AttributeElementReadWrite attribute in contextDocument.Request.Resources[0].Attributes)
{
attributes.Add(new ctx.AttributeElementReadWrite(attribute));
}
ctx.ResourceContentElement resourceContent = null;
if (contextDocument.Request.Resources[0].ResourceContent != null)
{
resourceContent = new ctx.ResourceContentElement(
contextDocument.Request.Resources[0].ResourceContent.XmlDocument,
contextDocument.Request.Resources[0].ResourceContent.SchemaVersion);
}
_engine = engine;
_policyDocument = policyDocument;
_contextDocument = contextDocument;
_currentResource = new ctx.ResourceElementReadWrite(
resourceContent,
contextDocument.Request.Resources[0].ResourceScopeValue,
attributes,
contextDocument.Request.Resources[0].SchemaVersion);
}
/// <summary>
/// Returns a policy set document using the PolicySetRefereneId specified.
/// </summary>
/// <param name="policySetReference">The policy set reference with the Id of the policy set searched.</param>
/// <returns>The policy set document.</returns>
public pol.PolicySetElement GetPolicySet(pol.PolicySetIdReferenceElement policySetReference)
{
if (policySetReference == null)
{
throw new ArgumentNullException("policySetReference");
}
pol.PolicyDocument doc = _policySets[policySetReference.PolicySetId] as pol.PolicyDocument;
if (doc != null)
{
return((pol.PolicySetElement)doc.PolicySet); //TODO: check if we have to return a read write or a read only policy here.
}
return(null);
}
/// <summary>
/// Method called by the EvaluationEngine when the evaluation is executed without a policy document, this
/// method search in the policy repository and return the first policy that matches its target with the
/// context document specified.
/// </summary>
/// <param name="context">The evaluation context instance.</param>
/// <returns>The policy document ready to be used by the evaluation engine.</returns>
public pol.PolicyDocument Match(rtm.EvaluationContext context)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
pol.PolicyDocument polEv = null;
//Search if there is a policySet which target matches the context document
foreach (pol.PolicyDocument policy in _policySets.Values)
{
rtm.PolicySet tempPolicy = new rtm.PolicySet(context.Engine, (pol.PolicySetElement)policy.PolicySet);
rtm.EvaluationContext tempContext = new rtm.EvaluationContext(context.Engine, policy, context.ContextDocument);
// Match the policy set target with the context document
if (tempPolicy.Match(tempContext) == rtm.TargetEvaluationValue.Match)
{
if (polEv == null)
{
polEv = policy;
}
else
{
throw new EvaluationException(Resource.ResourceManager[Resource.MessageKey.exc_duplicated_policy_in_repository]);
}
}
}
//Search if there is a policy which target matches the context document
foreach (pol.PolicyDocument policy in _policies.Values)
{
rtm.Policy tempPolicy = new rtm.Policy((pol.PolicyElement)policy.Policy);
rtm.EvaluationContext tempContext = new rtm.EvaluationContext(context.Engine, policy, context.ContextDocument);
// Match the policy target with the context document
if (tempPolicy.Match(tempContext) == rtm.TargetEvaluationValue.Match)
{
if (polEv == null)
{
polEv = policy;
}
else
{
throw new EvaluationException(Resource.ResourceManager[Resource.MessageKey.exc_duplicated_policy_in_repository]);
}
}
}
return(polEv);
}
/// <summary>
/// Creates a new instance of the evaluaion context.
/// </summary>
/// <param name="engine">The engine instance.</param>
/// <param name="policyDocument">The policy document instance.</param>
/// <param name="contextDocument">The context document instance.</param>
public EvaluationContext( EvaluationEngine engine, pol.PolicyDocument policyDocument, ctx.ContextDocument contextDocument )
: this()
{
ctx.AttributeReadWriteCollection attributes = new ctx.AttributeReadWriteCollection();
foreach( ctx.AttributeElementReadWrite attribute in contextDocument.Request.Resources[0].Attributes )
{
attributes.Add( new ctx.AttributeElementReadWrite( attribute ) );
}
ctx.ResourceContentElement resourceContent = null;
if( contextDocument.Request.Resources[0].ResourceContent != null )
{
resourceContent = new ctx.ResourceContentElement(
contextDocument.Request.Resources[0].ResourceContent.XmlDocument,
contextDocument.Request.Resources[0].ResourceContent.SchemaVersion );
}
_engine = engine;
_policyDocument = policyDocument;
_contextDocument = contextDocument;
_currentResource = new ctx.ResourceElementReadWrite(
resourceContent,
contextDocument.Request.Resources[0].ResourceScopeValue,
attributes,
contextDocument.Request.Resources[0].SchemaVersion );
}
