/// <summary>
/// Gets the overridden name for an enum value. The overridden name can be set via the <see cref="JsonEnumValueAttribute"/>. If null or empty string is returned, the original name of the enum value is used.
/// </summary>
/// <param name="member">The enum value member.</param>
/// <returns>The name of the enum value.</returns>
public override string GetEnumValueName(MemberInfo member)
{
var a = AttributeHelper.GetAttribute <JsonEnumValueAttribute> (member, false);
if (a != null)
{
return(a.Name);
}
#if NET_40_OR_GREATER
if (UseDataContractAttributes)
{
var m = AttributeHelper.GetAttribute <EnumMemberAttribute> (member, true);
if (m != null && String.IsNullOrEmpty(m.Value) == false)
{
return(m.Value);
}
}
#endif
if (UseXmlSerializationAttributes)
{
var m = AttributeHelper.GetAttribute <XmlEnumAttribute> (member, true);
if (m != null)
{
return(m.Name);
}
}
return(null);
}
/// <summary>
/// Gets whether a field or a property is deserializable. If false is returned, the member will be excluded from deserialization. By default, writable fields or properties are deserializable. The value can be set via <see cref="System.ComponentModel.ReadOnlyAttribute"/>.
/// </summary>
/// <param name="member">The member to be serialized.</param>
/// <param name="info">Reflection information for the member.</param>
/// <returns>True is returned if the member is serializable, otherwise, false.</returns>
public override bool IsMemberDeserializable(MemberInfo member, IMemberInfo info)
{
var ro = AttributeHelper.GetAttribute <System.ComponentModel.ReadOnlyAttribute> (member, true);
if (ro != null)
{
return(ro.IsReadOnly == false);
}
var s = AttributeHelper.GetAttribute <JsonSerializableAttribute> (member, true);
if (s != null)
{
return(true);
}
#if NET_40_OR_GREATER
if (UseDataContractAttributes && _ContractualTypes.Contains(member.DeclaringType))
{
return(AttributeHelper.HasAttribute <DataMemberAttribute> (member, true));
}
if (UseDataContractAttributes && AttributeHelper.HasAttribute <IgnoreDataMemberAttribute> (member, true))
{
return(false);
}
#endif
if (UseXmlSerializationAttributes && AttributeHelper.HasAttribute <XmlIgnoreAttribute> (member, false))
{
return(false);
}
return(base.IsMemberDeserializable(member, info));
}
/// <summary>
/// This method returns an <see cref="IJsonConverter"/> instance to convert item values for a field or a property which is of <see cref="IEnumerable"/> type during serialization and deserialization. If no converter is used, null can be returned. The converter can be set via <see cref="JsonItemConverterAttribute"/>.
/// </summary>
/// <param name="member">The <see cref="MemberInfo"/> of the field or property.</param>
/// <returns>The converter.</returns>
public override IJsonConverter GetMemberItemConverter(MemberInfo member)
{
var cv = AttributeHelper.GetAttribute <JsonItemConverterAttribute> (member, true);
if (cv != null)
{
return(cv.Converter);
}
return(null);
}
/// <summary>
/// Gets the name of the collection container for customized types which implement <see cref="IEnumerable"/> and have extra members to be serialized.
/// </summary>
/// <param name="type">The <see cref="Type"/> which implements <see cref="IEnumerable"/> and contains extra members to be serialized.</param>
/// <returns>The name of the collection container. If null is returned, no container will be created.</returns>
/// <remarks>By default, the serializer serializes types which implement <see cref="IEnumerable"/> interface as JSON arrays.
/// Members of the type will be ignored. And so to the types which implements <see cref="IDictionary"/>.
/// To serialize those members, return a non-empty name and the members will be serialized into a field named returned by this method.</remarks>
public override string GetCollectionContainerName(Type type)
{
var n = AttributeHelper.GetAttribute <JsonCollectionAttribute> (type, true);
if (n != null && String.IsNullOrEmpty(n.Name) == false)
{
return(n.Name);
}
return(null);
}
/// <summary>
/// This method is called to get the <see cref="IJsonConverter"/> for the type. If no converter, null should be returned. The converter can be set via <see cref="JsonConverterAttribute"/>.
/// </summary>
/// <param name="type">The type to be checked for <see cref="IJsonConverter"/>.</param>
/// <returns>The interceptor.</returns>
public override IJsonConverter GetConverter(Type type)
{
var ia = AttributeHelper.GetAttribute <JsonConverterAttribute> (type, true);
if (ia != null)
{
return(ia.Converter);
}
return(null);
}
/// <summary>
/// Returns the <see cref="IJsonInterceptor"/> for given type. If no interceptor, null should be returned. The interceptor can be set via <see cref="JsonInterceptorAttribute"/>.
/// </summary>
/// <param name="type">The type to be checked.</param>
/// <returns>The interceptor.</returns>
public override IJsonInterceptor GetInterceptor(Type type)
{
#if NET_40_OR_GREATER
if (UseDataContractAttributes && AttributeHelper.HasAttribute <DataContractAttribute> (type, false))
{
_ContractualTypes.Add(type);
}
#endif
var ia = AttributeHelper.GetAttribute <JsonInterceptorAttribute> (type, true);
if (ia != null)
{
return(ia.Interceptor);
}
return(null);
}
/// <summary>
/// Sets user-defined type aliases for serialized types using the <see cref="JsonTypeAttribute"/>.
/// </summary>
/// <param name="list">List of types to be aliased</param>
public void RegisterTypeAlias(List <Type> list)
{
_typeAliases.Clear();
_reverseTypeAliases.Clear();
if (null == list)
{
return;
}
foreach (Type item in list)
{
JsonTypeAttribute att = AttributeHelper.GetAttribute <JsonTypeAttribute>(item, false);
if (null == att)
{
continue;
}
_typeAliases.Add(item.AssemblyQualifiedName, att.Name);
_reverseTypeAliases.Add(att.Name, item.AssemblyQualifiedName);
}
}
/// <summary>
/// This method returns a series of values that will not be serialized for a field or a property. When the value of the member matches those values, it will not be serialized. If all values can be serialized, null should be returned. The value can be set via <see cref="System.ComponentModel.DefaultValueAttribute"/>.
/// </summary>
/// <param name="member">The <see cref="MemberInfo"/> of the field or property.</param>
/// <returns>The values which are not serialized for <paramref name="member"/>.</returns>
public override IEnumerable GetNonSerializedValues(MemberInfo member)
{
var a = AttributeHelper.GetAttribute <System.ComponentModel.DefaultValueAttribute> (member, true);
var n = AttributeHelper.GetAttributes <JsonNonSerializedValueAttribute> (member, true);
if (a == null && n.Length == 0)
{
return(null);
}
var v = new List <object> ();
if (a != null)
{
v.Add(a.Value);
}
foreach (var item in n)
{
v.Add(item.Value);
}
return(v);
}
/// <summary>
/// Returns whether the specific member is serializable. This value can be set via <see cref="JsonIncludeAttribute"/> and <see cref="IgnoreAttributes"/>.
/// If true is returned, the member will always get serialized.
/// If false is returned, the member will be excluded from serialization.
/// If null is returned, the serialization of the member will be determined by the settings in <see cref="JSONParameters"/>.
/// </summary>
/// <param name="member">The member to be serialized.</param>
/// <param name="info">Reflection information for the member.</param>
/// <returns>True is returned if the member is serializable, otherwise, false.</returns>
public override bool?IsMemberSerializable(MemberInfo member, IMemberInfo info)
{
var ic = AttributeHelper.GetAttribute <JsonIncludeAttribute> (member, true);
if (ic != null)
{
return(ic.Include ? true : false);
}
if (AttributeHelper.HasAttribute <JsonSerializableAttribute> (member, true))
{
return(true);
}
#if NET_40_OR_GREATER
if (UseDataContractAttributes && _ContractualTypes.Contains(member.DeclaringType))
{
return(AttributeHelper.HasAttribute <DataMemberAttribute> (member, true));
}
if (UseDataContractAttributes && AttributeHelper.HasAttribute <IgnoreDataMemberAttribute> (member, true))
{
return(false);
}
#endif
if (UseXmlSerializationAttributes && AttributeHelper.HasAttribute <XmlIgnoreAttribute> (member, false))
{
return(false);
}
if (IgnoreAttributes != null && IgnoreAttributes.Count > 0)
{
foreach (var item in IgnoreAttributes)
{
if (member.IsDefined(item, false))
{
return(false);
}
}
}
return(base.IsMemberSerializable(member, info));
}
/// <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>
/// 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;
}
foreach (var item in AttributeHelper.GetAttributes <XmlElementAttribute> (member, true))
{
if (String.IsNullOrEmpty(item.ElementName))
{
continue;
}
if (item.DataType == 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);
}
}
var an = AttributeHelper.GetAttribute <XmlAttributeAttribute> (member, true);
if (an != null)
{
tn.DefaultName = an.AttributeName;
}
}
return(tn);
}
