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2024-12-29 72e75456f8b30ec5b6f355539d9c883b0f810d21

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using System;
using System.Dynamic;
using System.Runtime.CompilerServices;
using DPumpHydr.WinFrmUI.WenSkin.Json.Utilities;
 
namespace DPumpHydr.WinFrmUI.WenSkin.Json.Serialization
{
    /// <summary>
    /// Contract details for a <see cref="T:System.Type" /> used by the <see cref="T:Newtonsoft.Json.JsonSerializer" />.
    /// </summary>
    public class JsonDynamicContract : JsonContainerContract
    {
        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);
 
        /// <summary>
        /// Gets the object's properties.
        /// </summary>
        /// <value>The object's properties.</value>
        public JsonPropertyCollection Properties { get; private set; }
 
        /// <summary>
        /// Gets or sets the property name resolver.
        /// </summary>
        /// <value>The property name resolver.</value>
        public Func<string, string> PropertyNameResolver { get; set; }
 
        private static CallSite<Func<CallSite, object, object>> CreateCallSiteGetter(string name)
        {
            return CallSite<Func<CallSite, object, object>>.Create(new NoThrowGetBinderMember((GetMemberBinder)DynamicUtils.BinderWrapper.GetMember(name, typeof(DynamicUtils))));
        }
 
        private static CallSite<Func<CallSite, object, object, object>> CreateCallSiteSetter(string name)
        {
            return CallSite<Func<CallSite, object, object, object>>.Create(new NoThrowSetBinderMember((SetMemberBinder)DynamicUtils.BinderWrapper.SetMember(name, typeof(DynamicUtils))));
        }
 
        /// <summary>
        /// Initializes a new instance of the <see cref="T:Newtonsoft.Json.Serialization.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(base.UnderlyingType);
        }
 
        internal bool TryGetMember(IDynamicMetaObjectProvider dynamicProvider, string name, out object value)
        {
            ValidationUtils.ArgumentNotNull(dynamicProvider, "dynamicProvider");
            CallSite<Func<CallSite, object, object>> callSite = _callSiteGetters.Get(name);
            object obj = callSite.Target(callSite, dynamicProvider);
            if (obj != NoThrowExpressionVisitor.ErrorResult)
            {
                value = obj;
                return true;
            }
            value = null;
            return false;
        }
 
        internal bool TrySetMember(IDynamicMetaObjectProvider dynamicProvider, string name, object value)
        {
            ValidationUtils.ArgumentNotNull(dynamicProvider, "dynamicProvider");
            CallSite<Func<CallSite, object, object, object>> callSite = _callSiteSetters.Get(name);
            return callSite.Target(callSite, dynamicProvider, value) != NoThrowExpressionVisitor.ErrorResult;
        }
    }
}