/// <summary>
/// This method is called to determine whether the values of the given <see cref="Enum"/> type should be serialized as its numeric form rather than literal form. The override can be set via the <see cref="JsonEnumFormatAttribute"/>.
/// </summary>
/// <param name="type">An <see cref="Enum"/> value type.</param>
/// <returns>If the type should be serialized numerically, returns true, otherwise, false.</returns>
public override EnumValueFormat GetEnumValueFormat(Type type)
{
var a = AttributeHelper.GetAttribute <JsonEnumFormatAttribute> (type, false);
return(a != null ? a.Format : EnumValueFormat.Default);
}
/// <summary>
/// Gets whether the type is always deserializable. The value can be set via <see cref="JsonSerializableAttribute"/>.
/// </summary>
/// <param name="type">The type to be deserialized.</param>
/// <returns>Whether the type can be deserialized even if it is a non-public type.</returns>
public override bool IsAlwaysDeserializable(Type type)
{
return(AttributeHelper.HasAttribute <JsonSerializableAttribute> (type, false));
}
/// <summary>
/// This method returns possible names for corresponding types of a field or a property. This enables polymorphic serialization and deserialization for abstract classes, interfaces, or object types, with predetermined concrete types. If polymorphic serialization is not used, null or an empty <see cref="SerializedNames"/> could be returned. The names can be set via <see cref="JsonFieldAttribute"/>.
/// </summary>
/// <param name="member">The <see cref="MemberInfo"/> of the field or property.</param>
/// <returns>The dictionary contains types and their corresponding names.</returns>
/// <exception cref="InvalidCastException">The <see cref="JsonFieldAttribute.DataType"/> type does not derive from the member type.</exception>
public override SerializedNames GetSerializedNames(MemberInfo member)
{
var tn = new SerializedNames();
var jf = AttributeHelper.GetAttributes <JsonFieldAttribute> (member, true);
var f = member as FieldInfo;
var p = member as PropertyInfo;
var t = p != null ? p.PropertyType : f.FieldType;
foreach (var item in jf)
{
if (String.IsNullOrEmpty(item.Name))
{
continue;
}
if (item.DataType == null)
{
tn.DefaultName = item.Name;
}
else
{
if (t.IsAssignableFrom(item.DataType) == false)
{
throw new InvalidCastException("The override type (" + item.DataType.FullName + ") does not derive from the member type (" + t.FullName + ")");
}
tn.Add(item.DataType, item.Name);
}
}
#if NET_40_OR_GREATER
if (UseDataContractAttributes && jf.Length == 0)
{
var m = AttributeHelper.GetAttribute <DataMemberAttribute> (member, true);
if (m != null && String.IsNullOrEmpty(m.Name) == false)
{
tn.DefaultName = m.Name;
}
}
#endif
if (UseXmlSerializationAttributes)
{
var ar = AttributeHelper.GetAttribute <XmlArrayAttribute> (member, true);
if (ar != null)
{
tn.DefaultName = ar.ElementName;
return(tn);
}
var an = AttributeHelper.GetAttribute <XmlAttributeAttribute> (member, true);
if (an != null)
{
tn.DefaultName = an.AttributeName;
return(tn);
}
if (typeof(IEnumerable).IsAssignableFrom(t))
{
return(tn);
}
foreach (var item in AttributeHelper.GetAttributes <XmlElementAttribute> (member, true))
{
if (String.IsNullOrEmpty(item.ElementName))
{
continue;
}
if (item.Type == null)
{
tn.DefaultName = item.ElementName;
}
else
{
if (t.IsAssignableFrom(item.Type) == false)
{
throw new InvalidCastException("The override type (" + item.Type.FullName + ") does not derive from the member type (" + t.FullName + ")");
}
tn.Add(item.Type, item.ElementName);
}
}
}
return(tn);
}
internal ReflectionCache(Type type)
{
Type = type;
TypeName = type.FullName;
AssemblyName = type.AssemblyQualifiedName;
CircularReferencable = type.IsValueType == false || type != typeof(string);
IsAbstract = type.IsUndetermined();
IsAnonymous = type.IsAnonymous();
JsonDataType = Reflection.GetJsonDataType(type);
SerializeMethod = JsonSerializer.GetWriteJsonMethod(type);
DeserializeMethod = JsonDeserializer.GetReadJsonMethod(type);
if (JsonDataType == JsonDataType.Enum)
{
IsFlaggedEnum = AttributeHelper.HasAttribute <FlagsAttribute> (type, false);
return;
}
if (type.IsPointer)
{
throw new JsonSerializationException("Can not serialize pointer type: " + type.AssemblyQualifiedName);
}
if (type.IsArray)
{
ArgumentTypes = new Type[] { type.GetElementType() };
CommonType = type.GetArrayRank() == 1 ? ComplexType.Array : ComplexType.MultiDimensionalArray;
}
else
{
var t = type;
if (t.IsGenericType == false)
{
while ((t = t.BaseType) != null)
{
if (t.IsGenericType)
{
break;
}
}
}
if (t != null)
{
ArgumentTypes = t.GetGenericArguments();
var gt = t.GetGenericTypeDefinition();
if (gt.Equals(typeof(Dictionary <,>)))
{
CommonType = ComplexType.Dictionary;
}
else if (gt.Equals(typeof(List <>)))
{
CommonType = ComplexType.List;
}
else if (gt.Equals(typeof(Nullable <>)))
{
CommonType = ComplexType.Nullable;
SerializeMethod = JsonSerializer.GetWriteJsonMethod(ArgumentTypes[0]);
}
}
}
if (typeof(IEnumerable).IsAssignableFrom(type))
{
if (typeof(Array).IsAssignableFrom(type) == false)
{
AppendItem = Reflection.CreateWrapperMethod <AddCollectionItem> (Reflection.FindMethod(type, "Add", new Type[] { null }));
}
if (ArgumentTypes != null && ArgumentTypes.Length == 1)
{
ItemSerializer = JsonSerializer.GetWriteJsonMethod(ArgumentTypes[0]);
ItemDeserializer = JsonDeserializer.GetReadJsonMethod(ArgumentTypes[0]);
}
}
if (ArgumentTypes != null)
{
ArgumentReflections = new ReflectionCache[ArgumentTypes.Length];
}
if (CommonType != ComplexType.Array &&
CommonType != ComplexType.MultiDimensionalArray &&
CommonType != ComplexType.Nullable)
{
if (type.IsPubliclyAccessible() == false)
{
ConstructorInfo |= ConstructorTypes.NonPublic;
}
if (type.IsClass || type.IsValueType)
{
try {
Constructor = Reflection.CreateConstructorMethod(type, type.IsVisible == false || typeof(DatasetSchema).Equals(type));
}
catch (Exception ex) {
throw new JsonSerializationException("Error occurred when creating constructor method for type " + type.AssemblyQualifiedName, ex);
}
if (Constructor != null && Constructor.Method.IsPublic == false)
{
ConstructorInfo |= ConstructorTypes.NonPublic;
}
if (Constructor == null)
{
var c = type.GetConstructors(BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
if (c != null && c.Length > 0)
{
ConstructorInfo |= ConstructorTypes.Parametric;
}
}
Members = Reflection.GetMembers(type);
}
}
//if (typeof (IEnumerable).IsAssignableFrom (type)) {
// return;
//}
//if (JsonDataType != JsonDataType.Undefined) {
// return;
//}
}
