private void AssertStep(AdkXPathStep step, String name, String singePredicateName, object singlePredicateValue)
{
Assert.AreEqual(name, ((AdkNodeNameTest)step.NodeTest).NodeName);
Assert.IsNotNull(step.Predicates);
Assert.AreEqual(1, step.Predicates.Length);
Assert.IsInstanceOfType(typeof(AdkEqualOperation), step.Predicates[0]);
AdkExpression[] components = ((AdkEqualOperation)step.Predicates[0]).Arguments;
Assert.AreEqual(2, components.Length);
Assert.IsInstanceOfType(typeof(AdkLocPath), components[0]);
AdkLocPath lp = (AdkLocPath)components[0];
AdkNodeNameTest attrName = (AdkNodeNameTest)lp.Steps[0].NodeTest;
Assert.AreEqual(singePredicateName, attrName.NodeName);
object value = components[1].ComputeValue(null);
Assert.AreEqual(singlePredicateValue, value);
}
/// <summary>
/// Evaluates the current step in the path. If the path represented by the step does not
/// exist, NULL is returned. Otherwise, the node found is returned unless the special adk:X()
/// marker function is contained in the predicate expression, which signals that the specified
/// repeatable element should always be created
/// </summary>
/// <param name="navigator"></param>
/// <param name="parentPath"></param>
/// <param name="currentStep"></param>
/// <returns></returns>
private INodePointer FindChild(XPathNavigator navigator, StringBuilder parentPath, AdkXPathStep currentStep)
{
String currentStepxPath = currentStep.ToString();
if (currentStep.IsContextDependent())
{
// If the special 'adk:x()' function is present, that means to always
// create the element, therefore, return null as if it were not found
if (currentStepxPath.IndexOf("adk:x") > -1)
{
return(null);
}
}
navigator.MoveToRoot();
SifXPathNavigator sifNav =
(SifXPathNavigator)navigator.SelectSingleNode(parentPath + "/" + currentStepxPath);
if (sifNav != null)
{
return(sifNav.UnderlyingPointer);
}
return(null);
}
