///<summary>
///When overridden in a derived class, moves the <see cref="T:System.Xml.XPath.XPathNavigator"></see> to the same position as the specified <see cref="T:System.Xml.XPath.XPathNavigator"></see>.
///</summary>
///
///<returns>
///Returns true if the <see cref="T:System.Xml.XPath.XPathNavigator"></see> is successful moving to the same position as the specified <see cref="T:System.Xml.XPath.XPathNavigator"></see>; otherwise, false. If false, the position of the <see cref="T:System.Xml.XPath.XPathNavigator"></see> is unchanged.
///</returns>
///
///<param name="other">The <see cref="T:System.Xml.XPath.XPathNavigator"></see> positioned on the node that you want to move to. </param>
public override bool MoveTo(XPathNavigator other)
{
if (other is SifXPathNavigator)
{
SifXPathNavigator sxn = (SifXPathNavigator)other;
fCursor = sxn.fCursor.Clone();
return(true);
}
return(false);
}
/// <summary>
/// Creates a new SifXPathContext
/// </summary>
/// <param name="parent"></param>
/// <param name="context"></param>
private SifXPathContext(SifXPathContext parent, SifElement context)
{
if (parent != null)
{
fContext = parent.fContext;
}
else
{
fContext = new SifXsltContext();
fContext.AddFunctions("adk", new ClassFunctions(typeof(AdkFunctions), null));
}
SifVersion version = context.SifVersion;
if (version == null)
{
version = SifVersion.LATEST;
}
fContextElement = context;
fContextPointer = new SifElementPointer(null, fContextElement, version);
fDefaultNavigator = new SifXPathNavigator(fContext, fContextPointer);
}
/// <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);
}
///<summary>
///When overridden in a derived class, creates a new <see cref="T:System.Xml.XPath.XPathNavigator"></see> positioned at the same node as this <see cref="T:System.Xml.XPath.XPathNavigator"></see>.
///</summary>
///
///<returns>
///A new <see cref="T:System.Xml.XPath.XPathNavigator"></see> positioned at the same node as this <see cref="T:System.Xml.XPath.XPathNavigator"></see>.
///</returns>
///
public override XPathNavigator Clone()
{
SifXPathNavigator navigator = new SifXPathNavigator(fParentContext, fNameTable, fCursor.Clone());
return(navigator);
}
