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#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion
using System.Threading;
#if !(NET35 || NET20 || NETFX_CORE)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using Newtonsoft.Json.Serialization;
namespace Newtonsoft.Json.Utilities
{
internal static class FSharpUtils
{
private static readonly object Lock = new object();
private static bool _initialized;
private static MethodInfo _ofSeq;
private static Type _mapType;
public static Assembly FSharpCoreAssembly { get; private set; }
public static MethodCall<object, object> IsUnion { get; private set; }
public static MethodCall<object, object> GetUnionFields { get; private set; }
public static MethodCall<object, object> GetUnionCases { get; private set; }
public static MethodCall<object, object> MakeUnion { get; private set; }
public static Func<object, object> GetUnionCaseInfoName { get; private set; }
public static Func<object, object> GetUnionCaseInfo { get; private set; }
public static Func<object, object> GetUnionCaseFields { get; private set; }
public static MethodCall<object, object> GetUnionCaseInfoFields { get; private set; }
public const string FSharpSetTypeName = "FSharpSet`1";
public const string FSharpListTypeName = "FSharpList`1";
public const string FSharpMapTypeName = "FSharpMap`2";
public static void EnsureInitialized(Assembly fsharpCoreAssembly)
{
if (!_initialized)
{
lock (Lock)
{
if (!_initialized)
{
FSharpCoreAssembly = fsharpCoreAssembly;
Type fsharpType = fsharpCoreAssembly.GetType("Microsoft.FSharp.Reflection.FSharpType");
MethodInfo isUnionMethodInfo = fsharpType.GetMethod("IsUnion", BindingFlags.Public | BindingFlags.Static);
IsUnion = JsonTypeReflector.ReflectionDelegateFactory.CreateMethodCall<object>(isUnionMethodInfo);
MethodInfo getUnionCasesMethodInfo = fsharpType.GetMethod("GetUnionCases", BindingFlags.Public | BindingFlags.Static);
GetUnionCases = JsonTypeReflector.ReflectionDelegateFactory.CreateMethodCall<object>(getUnionCasesMethodInfo);
Type fsharpValue = fsharpCoreAssembly.GetType("Microsoft.FSharp.Reflection.FSharpValue");
MethodInfo getUnionFieldsMethodInfo = fsharpValue.GetMethod("GetUnionFields", BindingFlags.Public | BindingFlags.Static);
GetUnionFields = JsonTypeReflector.ReflectionDelegateFactory.CreateMethodCall<object>(getUnionFieldsMethodInfo);
GetUnionCaseInfo = JsonTypeReflector.ReflectionDelegateFactory.CreateGet<object>(getUnionFieldsMethodInfo.ReturnType.GetProperty("Item1"));
GetUnionCaseFields = JsonTypeReflector.ReflectionDelegateFactory.CreateGet<object>(getUnionFieldsMethodInfo.ReturnType.GetProperty("Item2"));
MethodInfo makeUnionMethodInfo = fsharpValue.GetMethod("MakeUnion", BindingFlags.Public | BindingFlags.Static);
MakeUnion = JsonTypeReflector.ReflectionDelegateFactory.CreateMethodCall<object>(makeUnionMethodInfo);
Type unionCaseInfo = fsharpCoreAssembly.GetType("Microsoft.FSharp.Reflection.UnionCaseInfo");
GetUnionCaseInfoName = JsonTypeReflector.ReflectionDelegateFactory.CreateGet<object>(unionCaseInfo.GetProperty("Name"));
GetUnionCaseInfoFields = JsonTypeReflector.ReflectionDelegateFactory.CreateMethodCall<object>(unionCaseInfo.GetMethod("GetFields"));
Type listModule = fsharpCoreAssembly.GetType("Microsoft.FSharp.Collections.ListModule");
_ofSeq = listModule.GetMethod("OfSeq");
_mapType = fsharpCoreAssembly.GetType("Microsoft.FSharp.Collections.FSharpMap`2");
#if !(NETFX_CORE || PORTABLE)
Thread.MemoryBarrier();
#endif
_initialized = true;
}
}
}
}
public static ObjectConstructor<object> CreateSeq(Type t)
{
MethodInfo seqType = _ofSeq.MakeGenericMethod(t);
return JsonTypeReflector.ReflectionDelegateFactory.CreateParametrizedConstructor(seqType);
}
public static ObjectConstructor<object> CreateMap(Type keyType, Type valueType)
{
MethodInfo creatorDefinition = typeof (FSharpUtils).GetMethod("BuildMapCreator");
MethodInfo creatorGeneric = creatorDefinition.MakeGenericMethod(keyType, valueType);
return (ObjectConstructor<object>)creatorGeneric.Invoke(null, null);
}
public static ObjectConstructor<object> BuildMapCreator<TKey, TValue>()
{
Type genericMapType = _mapType.MakeGenericType(typeof(TKey), typeof(TValue));
ConstructorInfo ctor = genericMapType.GetConstructor(new[] { typeof(IEnumerable<Tuple<TKey, TValue>>) });
ObjectConstructor<object> ctorDelegate = JsonTypeReflector.ReflectionDelegateFactory.CreateParametrizedConstructor(ctor);
ObjectConstructor<object> creator = args =>
{
// convert dictionary KeyValuePairs to Tuples
IEnumerable<KeyValuePair<TKey, TValue>> values = (IEnumerable<KeyValuePair<TKey, TValue>>)args[0];
IEnumerable<Tuple<TKey, TValue>> tupleValues = values.Select(kv => new Tuple<TKey, TValue>(kv.Key, kv.Value));
return ctorDelegate(tupleValues);
};
return creator;
}
}
}
#endif
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