public XPathMutableCursor(IXmlNode parent, CompiledXPath path,
IXmlIncludedTypeMap knownTypes, IXmlNamespaceSource namespaces, CursorFlags flags)
: base(path, namespaces, parent)
{
if (null == parent)
throw Error.ArgumentNull("parent");
if (null == path)
throw Error.ArgumentNull("path");
if (null == knownTypes)
throw Error.ArgumentNull("knownTypes");
if (!path.IsCreatable)
throw Error.XPathNotCreatable(path);
this.step = path.FirstStep;
this.knownTypes = knownTypes;
this.flags = flags;
var source = parent.RequireRealizable<XPathNavigator>();
if (source.IsReal)
iterator = new XPathBufferedNodeIterator(
source.Value.Select(path.FirstStep.Path));
}
internal void MakeNotCreatable()
{
firstStep = null;
depth = 0;
}
private int Descend()
{
step = step.NextStep;
return ++depth;
}
private void ResetDepth()
{
step = xpath.FirstStep;
depth = 0;
}
private void ResetDepth()
{
step = xpath.FirstStep;
depth = 0;
}
internal void MakeNotCreatable()
{
firstStep = null;
depth = 0;
}
private int Descend()
{
step = step.NextStep;
return(++depth);
}
