/// <summary>
/// Creates a new <see cref="Node"/> instance.
/// </summary>
/// <param name="context">Context this node belongs to.</param>
/// <param name="policy">The node policy.</param>
public Node(ObjectXPathContext context, INodePolicy policy)
{
_context = context;
_nodePolicy = policy;
_nodeType = XPathNodeType.All;
_nodeState = NodeState.ObjectNotKnown;
_attributesCount = -1;
_elementsCount = -1;
}
private void CheckAndSwitchPolicy()
{
if (_nodePolicy != null)
{
var newPolicy = _nodePolicy.GetNewPolicy(this);
if (newPolicy != null)
{
_nodePolicy = newPolicy;
}
}
}
/// <summary>
/// Creates a node policy for given object instance.
/// </summary>
/// <param name="obj">An object to create node policy for.</param>
/// <returns>An object implementing <see cref="INodePolicy"/> interface
/// which should be used to map this object to the tree node.</returns>
public INodePolicy GetNodePolicy(object obj)
{
INodePolicy policy = _nodePolicyFactory.GetPolicy(obj.GetType());
if (NodePolicyGet != null)
{
NodePolicyGetEventArgs e = new NodePolicyGetEventArgs(obj, policy);
NodePolicyGet(this, e);
if (e.Policy != null)
{
policy = e.Policy;
}
}
return(policy);
}
/// <summary>
/// Creates a new <see cref="Node"/> instance.
/// </summary>
/// <param name="context">Context this node belongs to.</param>
/// <param name="policy">The node policy.</param>
public Node(ObjectXPathContext context, INodePolicy policy)
{
_context = context;
_nodePolicy = policy;
// _parent = null;
//_index = 0;
//_name = null;
//_namespace = null;
_nodeType = XPathNodeType.All;
//_targetObject = null;
_nodeState = NodeState.ObjectNotKnown;
//_targetObjectType = null;
//_isTransparent = false;
//_knowTransparent = false;
//_value = null;
_attributesCount = -1;
_elementsCount = -1;
}
/// <summary>
/// Creates a new <see cref="Node"/> instance.
/// </summary>
/// <param name="context">Context this node belongs to.</param>
/// <param name="policy">The node policy.</param>
public Node( ObjectXPathContext context, INodePolicy policy )
{
_context = context;
_nodePolicy = policy;
// _parent = null;
//_index = 0;
//_name = null;
//_namespace = null;
_nodeType = XPathNodeType.All;
//_targetObject = null;
_nodeState = NodeState.ObjectNotKnown;
//_targetObjectType = null;
//_isTransparent = false;
//_knowTransparent = false;
//_value = null;
_attributesCount = -1;
_elementsCount = -1;
}
/// <summary>
/// See <see cref="INodePolicy.GetNewPolicy"/> for details.
/// </summary>
public override INodePolicy GetNewPolicy(Node node)
{
INodePolicy result = null;
// Check if we have to switch the policy
if (node.State == NodeState.ObjectKnown)
{
if (node.Object != null)
{
if (!node.ObjectType.IsSimpleType && node.Member.ConverterType == null)
{
// Create policy for a node that is not of simple type and
// without explicitly set converter
result = node.Context.GetNodePolicy(node.Object);
string s = node.Name;
s = node.Namespace;
}
else
{
// This is a node with simple content
result = TextNodePolicy.GetPolicy();
}
}
else
{
// The value of this member is null
result = NullValueNodePolicy.GetPolicy();
}
}
else if (node.State == NodeState.Exception)
{
// This is a node with exception
result = ExceptionNodePolicy.GetPolicy();
}
return(result);
}
/// <summary>
/// Creates a new <see cref="NodePolicyGetEventArgs"/> instance.
/// </summary>
/// <param name="obj">Object the policy is being created for.</param>
/// <param name="policy">Proposed policy.</param>
public NodePolicyGetEventArgs(object obj, INodePolicy policy)
{
_obj = obj;
_policy = policy;
}
private string _value; // Empty if null
#endregion Fields
#region Constructors
/// <summary>
/// Creates a new <see cref="Node"/> instance.
/// </summary>
/// <param name="context">Context this node belongs to.</param>
/// <param name="policy">The node policy.</param>
public Node( ObjectXPathContext context, INodePolicy policy )
{
_context = context;
_nodePolicy = policy;
_nodeType = XPathNodeType.All;
_nodeState = NodeState.ObjectNotKnown;
_attributesCount = -1;
_elementsCount = -1;
}
private void CheckAndSwitchPolicy()
{
if( _nodePolicy != null )
{
var newPolicy = _nodePolicy.GetNewPolicy( this );
if( newPolicy != null )
_nodePolicy = newPolicy;
}
}
/// <summary>
/// Creates a new <see cref="NodePolicyGetEventArgs"/> instance.
/// </summary>
/// <param name="obj">Object the policy is being created for.</param>
/// <param name="policy">Proposed policy.</param>
public NodePolicyGetEventArgs( object obj, INodePolicy policy )
{
_obj = obj;
_policy = policy;
}
