C# Value.InvokeDefaultGetHashCode方法代码示例

		/// <summary>
		/// Finds node that represents the same instance as given value.
		/// </summary>
		/// <param name="value">Valid value representing an instance.</param>
		private ObjectGraphNode getExistingNodeForValue(Value value) 
		{
			int objectHashCode = value.InvokeDefaultGetHashCode();
			// are there any nodes with the same hash code?
			var nodesWithSameHashCode = objectNodesForHashCode[objectHashCode];
			if (nodesWithSameHashCode == null) {
				return null;
			} else {
				// if there is a node with same hash code, check if it has also the same address
				// (hash codes are not uniqe - http://stackoverflow.com/questions/750947/-net-unique-object-identifier)
				ulong objectAddress = value.GetObjectAddress();
				ObjectGraphNode nodeWithSameAddress = 
					nodesWithSameHashCode.FirstOrDefault(node => node.PermanentReference.GetObjectAddress() == objectAddress);
				return nodeWithSameAddress;
			}
		}

		/// <summary>
		/// Creates new node for the value.
		/// </summary>
		/// <param name="permanentReference">Value, has to be valid.</param>
		/// <returns>New empty object node representing the value.</returns>
		private ObjectGraphNode createNewNode(Value permanentReference, GraphExpression expression)
		{
			if (permanentReference == null)	throw new ArgumentNullException("permanentReference");
			
			ObjectGraphNode newNode = new ObjectGraphNode();
			if (permanentReference.Type != null) {
				newNode.TypeName = permanentReference.Type.FormatNameCSharp();
			}
			newNode.HashCode = permanentReference.InvokeDefaultGetHashCode();
			
			resultGraph.AddNode(newNode);
			// remember this node's hashcode for quick lookup
			objectNodesForHashCode.Add(newNode.HashCode, newNode);
			
			// permanent reference to the object this node represents is useful for graph building,
			// and matching nodes in animations
			newNode.PermanentReference = permanentReference;
			newNode.Expression = expression;
			
			return newNode;
		}