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MaybeType.cs
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64 lines (55 loc) · 1.67 KB
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using System;
using System.Reflection;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
namespace Python.Runtime
{
[Serializable]
internal struct MaybeType : ISerializable
{
public static implicit operator MaybeType (Type ob) => new(ob);
// The AssemblyQualifiedName of the serialized Type
const string SerializationName = "n";
readonly string name;
readonly Type type;
public string DeletedMessage
{
get
{
return $"The .NET Type {name} no longer exists";
}
}
public Type Value
{
get
{
if (type == null)
{
throw new SerializationException(DeletedMessage);
}
return type;
}
}
public string Name => name;
public bool Valid => type != null;
public override string ToString()
{
return (type != null ? type.ToString() : $"missing type: {name}");
}
public MaybeType(Type tp)
{
type = tp;
name = tp.AssemblyQualifiedName;
}
private MaybeType(SerializationInfo serializationInfo, StreamingContext context)
{
name = (string)serializationInfo.GetValue(SerializationName, typeof(string));
type = Type.GetType(name, throwOnError:false);
}
public void GetObjectData(SerializationInfo serializationInfo, StreamingContext context)
{
serializationInfo.AddValue(SerializationName, name);
}
}
}