apewer-dotnet/Apewer/Externals/Newtonsoft.Json-11.0.1/Serialization/JsonDynamicContract.cs

#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

#if !NET20
using System;
using System.Dynamic;
using System.Runtime.CompilerServices;
using Newtonsoft.Json.Utilities;

namespace Newtonsoft.Json.Serialization
{
    /// <summary>
    /// Contract details for a <see cref="Type"/> used by the <see cref="JsonSerializer"/>.
    /// </summary>
    internal class JsonDynamicContract : JsonContainerContract
    {
        /// <summary>
        /// Gets the object's properties.
        /// </summary>
        /// <value>The object's properties.</value>
        public JsonPropertyCollection Properties { get; }

        /// <summary>
        /// Gets or sets the property name resolver.
        /// </summary>
        /// <value>The property name resolver.</value>
        public Func<string, string> PropertyNameResolver { get; set; }

        private readonly ThreadSafeStore<string, CallSite<Func<CallSite, object, object>>> _callSiteGetters =
            new ThreadSafeStore<string, CallSite<Func<CallSite, object, object>>>(CreateCallSiteGetter);

        private readonly ThreadSafeStore<string, CallSite<Func<CallSite, object, object, object>>> _callSiteSetters =
            new ThreadSafeStore<string, CallSite<Func<CallSite, object, object, object>>>(CreateCallSiteSetter);

        private static CallSite<Func<CallSite, object, object>> CreateCallSiteGetter(string name)
        {
            GetMemberBinder getMemberBinder = (GetMemberBinder)DynamicUtils.BinderWrapper.GetMember(name, typeof(DynamicUtils));

            return CallSite<Func<CallSite, object, object>>.Create(new NoThrowGetBinderMember(getMemberBinder));
        }

        private static CallSite<Func<CallSite, object, object, object>> CreateCallSiteSetter(string name)
        {
            SetMemberBinder binder = (SetMemberBinder)DynamicUtils.BinderWrapper.SetMember(name, typeof(DynamicUtils));

            return CallSite<Func<CallSite, object, object, object>>.Create(new NoThrowSetBinderMember(binder));
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="JsonDynamicContract"/> class.
        /// </summary>
        /// <param name="underlyingType">The underlying type for the contract.</param>
        public JsonDynamicContract(Type underlyingType)
            : base(underlyingType)
        {
            ContractType = JsonContractType.Dynamic;

            Properties = new JsonPropertyCollection(UnderlyingType);
        }

        internal bool TryGetMember(IDynamicMetaObjectProvider dynamicProvider, string name, out object value)
        {
            ValidationUtils.ArgumentNotNull(dynamicProvider, nameof(dynamicProvider));

            CallSite<Func<CallSite, object, object>> callSite = _callSiteGetters.Get(name);

            object result = callSite.Target(callSite, dynamicProvider);

            if (!ReferenceEquals(result, NoThrowExpressionVisitor.ErrorResult))
            {
                value = result;
                return true;
            }
            else
            {
                value = null;
                return false;
            }
        }

        internal bool TrySetMember(IDynamicMetaObjectProvider dynamicProvider, string name, object value)
        {
            ValidationUtils.ArgumentNotNull(dynamicProvider, nameof(dynamicProvider));

            CallSite<Func<CallSite, object, object, object>> callSite = _callSiteSetters.Get(name);

            object result = callSite.Target(callSite, dynamicProvider, value);

            return !ReferenceEquals(result, NoThrowExpressionVisitor.ErrorResult);
        }
    }
}

#endif