C# MemberAccessor.GetTypeAttributes方法代码示例

		public override object GetNullValue(MappingSchema mappingSchema, TypeExtension typeExtension, MemberAccessor member, out bool isSet)
		{
			// Check member [NullValue(0)]
			//
			var attr = member.GetAttribute<NullValueAttribute>();

			if (attr != null)
			{
				isSet = true;
				return CheckNullValue(attr.Value, member);
			}

			// Check type [NullValues(typeof(int), 0)]
			//
			var attrs = member.GetTypeAttributes(typeof(NullValueAttribute));

			foreach (NullValueAttribute a in attrs)
			{
				if (a.Type == null && a.Value != null && a.Value.GetType() == member.Type ||
					a.Type != null && a.Type == member.Type)
				{
					isSet = true;
					return CheckNullValue(a.Value, member);
				}
			}

			if (member.Type.IsEnum)
			{
				var value = CheckNullValue(mappingSchema.GetNullValue(member.Type), member);

				if (value != null)
				{
					isSet = true;
					return value;
				}
			}

			isSet = false;
			return null;
		}

		public override bool GetNullable(MappingSchema mappingSchema, TypeExtension typeExtension, MemberAccessor member, out bool isSet)
		{
			// Check member [Nullable(true | false)]
			//
			var attr1 = member.GetAttribute<NullableAttribute>();

			if (attr1 != null)
			{
				isSet = true;
				return attr1.IsNullable;
			}

			// Check member [NullValue(0)]
			//
			var attr2 = member.GetAttribute<NullValueAttribute>();

			if (attr2 != null)
				return isSet = true;

			// Check type [Nullable(true || false)]
			//
			attr1 = (NullableAttribute)TypeHelper.GetFirstAttribute(
				member.MemberInfo.DeclaringType, typeof(NullableAttribute));

			if (attr1 != null)
			{
				isSet = true;
				return attr1.IsNullable;
			}

			// Check type [NullValues(typeof(int), 0)]
			//
			var attrs = member.GetTypeAttributes(typeof(NullValueAttribute));

			foreach (NullValueAttribute a in attrs)
				if (a.Type == null && a.Value != null && a.Value.GetType() == member.Type ||
					a.Type != null && a.Type == member.Type)
					return isSet = true;

			if (member.Type.IsEnum)
				return isSet = mappingSchema.GetNullValue(member.Type) != null;

			if (member.Type.IsClass)
			{
				var pk = member.GetAttribute<PrimaryKeyAttribute>();

				if (pk != null)
				{
					isSet = false;
					return false;
				}
			}

			return base.GetNullable(mappingSchema, typeExtension, member, out isSet);
		}

		public override MapValue[] GetMapValues(TypeExtension typeExtension, MemberAccessor member, out bool isSet)
		{
			List<MapValue> list = null;

			object[] attrs = member.GetAttributes<MapValueAttribute>();

			if (attrs != null)
			{
				list = new List<MapValue>(attrs.Length);

				foreach (MapValueAttribute a in attrs)
					list.Add(new MapValue(a.OrigValue, a.Values));
			}

			attrs = member.GetTypeAttributes(typeof(MapValueAttribute));

			var memberType = TypeHelper.UnwrapNullableType(member.Type);

			if (attrs != null && attrs.Length > 0)
			{
				if (list == null)
					list = new List<MapValue>(attrs.Length);

				foreach (MapValueAttribute a in attrs)
					if (a.Type == null && a.OrigValue != null && a.OrigValue.GetType() == memberType ||
						a.Type is Type && (Type)a.Type == memberType)
						list.Add(new MapValue(a.OrigValue, a.Values));
			}

			var typeMapValues = GetMapValues(typeExtension, memberType, out isSet);

			if (list == null)
				return typeMapValues;

			if (typeMapValues != null)
				list.AddRange(typeMapValues);

			isSet = true;

			return list.ToArray();
		}

		public override object GetDefaultValue(MappingSchema mappingSchema, TypeExtension typeExtension, MemberAccessor member, out bool isSet)
		{
			// Check member [DefaultValue(0)]
			//
			var attr = member.GetAttribute<DefaultValueAttribute>();

			if (attr != null)
			{
				isSet = true;
				return attr.Value;
			}

			// Check type [DefaultValues(typeof(int), 0)]
			//
			var attrs = member.GetTypeAttributes(typeof(DefaultValueAttribute));

			foreach (DefaultValueAttribute a in attrs)
				if (a.Type == null && a.Value != null && a.Value.GetType() == member.Type ||
					a.Type != null && a.Type == member.Type)
				{
					isSet = true;
					return a.Value;
				}

			return GetDefaultValue(mappingSchema, typeExtension, member.Type, out isSet);
		}

		public override bool GetNullable(ObjectMapper mapper, MemberAccessor member, out bool isSet)
		{
			// Check member [Nullable(true | false)]
			//
			NullableAttribute attr1 = member.GetAttribute<NullableAttribute>();

			if (attr1 != null)
			{
				isSet = true;
				return attr1.IsNullable;
			}

			// Check member [NullValue(0)]
			//
			NullValueAttribute attr2 = member.GetAttribute<NullValueAttribute>();

			if (attr2 != null)
				return isSet = true;

			// Check type [Nullable(true || false)]
			//
			attr1 = (NullableAttribute)TypeHelper.GetFirstAttribute(
				member.MemberInfo.DeclaringType, typeof(NullableAttribute));

			if (attr1 != null)
			{
				isSet = true;
				return attr1.IsNullable;
			}

			// Check type [NullValues(typeof(int), 0)]
			//
			object[] attrs = member.GetTypeAttributes(typeof(NullValueAttribute));

			foreach (NullValueAttribute a in attrs)
				if (a.Type == null && a.Value != null && a.Value.GetType() == member.Type ||
					a.Type != null && a.Type == member.Type)
					return isSet = true;

			if (member.Type.IsEnum)
				return isSet = mapper.MappingSchema.GetNullValue(member.Type) != null;

			return base.GetNullable(mapper, member, out isSet);
		}