C# IDictionaryAdapter类代码示例

		public override void SetValue(IXmlNode node, IDictionaryAdapter parent, IXmlAccessor accessor, object oldValue, ref object value)
		{
			var newNode = (XmlNode) value;

			using (var writer = new XmlSubtreeWriter(node))
				newNode.WriteTo(writer);
		}

		void IDictionaryInitializer.Initialize(IDictionaryAdapter dictionaryAdapter, object[] behaviors)
		{
			var meta = dictionaryAdapter.Meta;
			if (meta.MetaInitializers.OfType<XPathBehavior>().FirstOrDefault() == null)
			{
				throw new InvalidOperationException(string.Format(
					"Interface {0} requested xpath support, but was not configured properly.  " +
					"Did you forget to add an XPathBehavior?", meta.Type.FullName));
			}

			var xmlMeta = dictionaryAdapter.GetXmlMeta();

			if (dictionaryAdapter.This.CreateStrategy == null)
			{
				dictionaryAdapter.This.CreateStrategy = this;
				dictionaryAdapter.This.AddCopyStrategy(this);
			}

			if (rootXmlMeta == null)
			{
				rootXmlMeta = xmlMeta;
				Context.ApplyBehaviors(rootXmlMeta, behaviors);

				if (Parent == null)
				{
					foreach (var behavior in behaviors)
					{
						if (behavior is XPathAttribute)
						{
							var attrib = (XPathAttribute)behavior;
							var compiledExpression = attrib.CompiledExpression;
							if (MoveOffRoot(root, XPathNodeType.Element) == false || Context.Matches(compiledExpression, root))
							{
								break;
							}

							var navigator = Context.SelectSingleNode(compiledExpression, root);
							if (navigator != null)
							{
								root = navigator;
								break;
							}
						}
					}
					MoveOffRoot(root, XPathNodeType.Element);
				}
			}
			else
			{
				if (overlays == null)
					overlays = new Dictionary<Type, XPathContext>();

				XPathContext overlay;
				if (overlays.TryGetValue(meta.Type, out overlay) == false)
				{
					overlay = new XPathContext().ApplyBehaviors(xmlMeta, behaviors);
					overlays.Add(meta.Type, overlay);
				}
			}
		}

		public override void SetValue(IXmlNode node, IDictionaryAdapter parent, IXmlAccessor accessor, ref object value)
		{
			var source      = (Array) value;
			var target      = (Array) null;
			var itemType    = source.GetType().GetElementType();
			var subaccessor = accessor.GetCollectionAccessor(itemType);
			var cursor      = subaccessor.SelectCollectionItems(node, true);
			var serializer  = subaccessor.Serializer;
			var references  = XmlAdapter.For(parent).References;

			for (var i = 0; i < source.Length; i++)
			{
				var originalItem = source.GetValue(i);
				var assignedItem = originalItem;

				subaccessor.SetValue(cursor, parent, references, cursor.MoveNext(), null /* TODO: Get Value */, ref assignedItem);

				if (target != null)
				{
					target.SetValue(assignedItem, i);
				}
				else if (!Equals(assignedItem, originalItem))
				{
					target = Array.CreateInstance(itemType, source.Length);
					Array.Copy(source, target, i);
					target.SetValue(assignedItem, i);
				}
			}

			cursor.RemoveAllNext();

			if (target != null)
				value = target;
		}

		public override object GetValue(IXmlNode node, IDictionaryAdapter parent, IXmlAccessor accessor)
		{
            using (var reader = new XmlSubtreeReader(node, Root))
                return serializer.CanDeserialize(reader)
                    ? serializer.Deserialize(reader)
                    : null;
		}

		public void CopyTo(IDictionaryAdapter other, Func<PropertyDescriptor, bool> selector)
		{
			if (ReferenceEquals(this, other))
			{
				return;
			}

			if (other.Meta.Type.IsAssignableFrom(Meta.Type) == false)
			{
				throw new ArgumentException(string.Format(
					"Unable to copy to {0}.  The type must be assignable from {1}.",
					other.Meta.Type.FullName, Meta.Type.FullName));
			}

			if (This.CopyStrategies.Aggregate(false, (copied, s) => copied | s.Copy(this, other, ref selector)))
			{
				return;
			}

			selector = selector ?? (property => true);

			foreach (var property in This.Properties.Values.Where(property => selector(property)))
			{
				var propertyValue = GetProperty(property.PropertyName, true);
				other.SetProperty(property.PropertyName, ref propertyValue);
			}
		}

		private object GetValueCore(IXmlNode node, IDictionaryAdapter parent, IXmlAccessor accessor)
		{
			var itemType    = node.ClrType.GetGenericArguments()[0];
			var listType    = ListTypeConstructor.MakeGenericType(itemType);
			var subaccessor = accessor.GetCollectionAccessor(itemType);
			return Activator.CreateInstance(listType, node, parent, subaccessor);
		}

		public override void SetValue(IXmlNode node, IDictionaryAdapter parent, IXmlAccessor accessor, object oldValue, ref object value)
		{
			if (node.ClrType != typeof(object))
				XmlTypeSerializer.For(node.ClrType).SetValue(node, parent, accessor, oldValue, ref value);
			else
				node.Clear();
		}

		public override object GetValue(IXmlNode node, IDictionaryAdapter parent, IXmlAccessor accessor)
		{
			var source = node.AsRealizable<XmlNode>();

			return (source != null && source.IsReal)
				? source.Value
				: null;
		}

		bool IDictionaryPropertySetter.SetPropertyValue(IDictionaryAdapter dictionaryAdapter,
			string key, ref object value, PropertyDescriptor property)
		{
			if (value != null)
			{
				value = GetPropertyAsString(property, value);
			}
			return true;
		}

 public object GetPropertyValue(IDictionaryAdapter dictionaryAdapter, string key, object storedValue, PropertyDescriptor property, bool ifExists)
 {
     if (storedValue != null)
     {
         return storedValue;
     }
     
     throw new InvalidOperationException(string.Format("App setting '{0}' not found!", key));
 }

		object IDictionaryCreateStrategy.Create(IDictionaryAdapter adapter, Type type, IDictionary dictionary)
		{
			dictionary = dictionary ??
#if SILVERLIGHT
			             new Dictionary<object, object>();
#else
			             new Hashtable();
#endif
			return adapter.This.Factory.GetAdapter(type, dictionary, adapter.This.Descriptor); ;
		}

		public bool Equals(IDictionaryAdapter adapter1, IDictionaryAdapter adapter2)
		{
			var id1 = adapter1.GetProperty("Id", false);
			if (id1 == null) return false;

			var id2 = adapter2.GetProperty("Id", false);
			if (id2 == null) return false;

			return id1.Equals(id2);
		}

		private static DictionaryAdapterMeta GetDictionaryMeta(IDictionaryAdapter dictionaryAdapter, Type otherType)
		{
			var meta = dictionaryAdapter.Meta;
			if (otherType != null && otherType != meta.Type)
			{
				meta = dictionaryAdapter.This.Factory.GetAdapterMeta(otherType,
					new DictionaryDescriptor().AddBehavior(XPathBehavior.Instance));
			}
			return meta;
		}

		private void ApplyValidationRules(IDictionaryAdapter dictionaryAdapter, IEnumerable<IValidationRule> rules,
										  PropertyDescriptor property, object propertyValue, IList<String> errors)
		{
			if (rules != null)
			{
				foreach (var rule in rules)
				{
					rule.Apply(dictionaryAdapter, property, propertyValue, errors);
				}
			}
		}

		public object GetPropertyValue(IDictionaryAdapter dictionaryAdapter,
			string key, object storedValue, PropertyDescriptor property, bool ifExists)
		{
			if (storedValue == null || storedValue.Equals(UnassignedGuid))
			{
				storedValue = Guid.NewGuid();
				property.SetPropertyValue(dictionaryAdapter, key, ref storedValue, dictionaryAdapter.This.Descriptor);
			}

			return storedValue;
		}