internal virtual bool IsSamePosition(ObjectNavigatorState other)
{
return other._node == _node &&
other._index == _index &&
other._name == _name &&
other._parent == _parent;
}
/// <summary>
/// Create a new navigator for the object graph
/// starting at node. The node's name is nodeName.
/// </summary>
/// <param name="node">root</param>
/// <param name="nodeName">root's name</param>
public XPathObjectNavigator(object node, string nodeName)
{
_context = new ObjectNavigationContext();
_context.NameTable.Add(string.Empty);
_root = new ObjectNavigatorStateRoot(_context, node, nodeName);
_state = _root.MoveToFirstChild();
_lang = _context.NameTable.Add("en-US");
}
public ObjectNavigatorState(ObjectNavigationContext context, ObjectNavigatorState parent, object node, string name)
{
_parent = parent;
_context = context;
_node = node;
_name = _context.NameTable.Add(name);
_index = 0;
}
internal ObjectNavigatorStateRoot(ObjectNavigationContext context, object node, string nodeName) : base(context, null, node, "#document")
{
if (null == nodeName)
{
nodeName = _node.GetType().Name;
}
_child = CreateElementState(context, this, node, nodeName);
}
internal static ObjectNavigatorState CreateElementState(ObjectNavigationContext context, ObjectNavigatorState parent, object node, string name)
{
if (node is IDictionary)
{
return new ObjectNavigatorStateDictionary(context, parent, node, name);
}
else if (node is IList)
{
return new ObjectNavigatorStateList(context, parent, node, name);
}
else
{
return new ObjectNavigatorStateItem(context, parent, node, name);
}
}
internal ObjectNavigatorStateItem(ObjectNavigationContext context, ObjectNavigatorState parent, object node, string name) :
base(context, parent, node, name)
{
}
internal ObjectNavigatorStateDictionary(ObjectNavigationContext context, ObjectNavigatorState parent, object node, string name) :
base(context, parent, node, name)
{
_dictionary = (IDictionary)node;
_children = new ArrayList(_dictionary.Keys);
}
internal ObjectNavigatorStateList(ObjectNavigationContext context, ObjectNavigatorState parent, object node, string name) :
base(context, parent, node, name)
{
_children = (IList)node;
}
/// <summary>
/// copy constructor.
/// </summary>
/// <param name="other">navigator to be copied</param>
public XPathObjectNavigator(XPathObjectNavigator other)
{
_context = other._context;
_state = other._state;
_root = other._root;
_lang = other._lang;
}
/// <summary>
/// See <see cref="System.Xml.XPath.XPathNavigator.MoveToRoot" /> for details.
/// </summary>
public override void MoveToRoot()
{
Trace("MoveToRoot");
_state = _root;
}
/// <summary>
/// See <see cref="System.Xml.XPath.XPathNavigator.MoveToParent" /> for details.
/// </summary>
public override bool MoveToParent()
{
Trace("MoveToParent");
if (null != _state.Parent)
{
_state = _state.Parent;
return true;
}
return false;
}
/// <summary>
/// See <see cref="System.Xml.XPath.XPathNavigator.MoveToNext" /> for details.
/// </summary>
public override bool MoveToNext()
{
Trace("MoveToNext");
ObjectNavigatorState newstate = _state.MoveToNext();
if (null != newstate)
{
_state = newstate;
return true;
}
return false;
}
/// <summary>
/// See <see cref="System.Xml.XPath.XPathNavigator.MoveToFirstChild" /> for details.
/// </summary>
public override bool MoveToFirstChild()
{
Trace("MoveToFirstChild");
ObjectNavigatorState newstate = _state.MoveToFirstChild();
if (null == newstate)
{
return false;
}
_state = newstate;
return true;
}
/// <summary>
/// See <see cref="System.Xml.XPath.XPathNavigator.MoveTo" /> for details.
/// </summary>
public override bool MoveTo(System.Xml.XPath.XPathNavigator other)
{
Trace("MoveTo");
XPathObjectNavigator navigator = other as XPathObjectNavigator;
if (null == other)
{
return false;
}
_state = navigator._state;
_root = navigator._root;
_context = navigator._context;
return true;
}