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fastJSON

, 26 Apr 2014
Smallest, fastest polymorphic JSON serializer (with Silverlight4 and MonoDroid support)
consoletest-noexe.zip
consoletest.zip
fastjson-noexe.zip
fastjson.zip
fastJSON_2.0.28.1.zip
Consoletest
fastJSON
fastJSON.snk
Properties
UnitTests
Properties
fastjson_v1.1-noexe.zip
fastjson_v1.1.zip
Properties
fastjson_v1.2-noexe.zip
fastjson_v1.2.zip
fastjson_v1.3-noexe.zip
fastjson_v1.3.zip
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fastjson_v1.7-noexe.zip
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fastjson_v1.7.6-noexe.zip
fastjson_v1.7.6.zip
fastjson_v1.7.7-noexe.zip
fastjson_v1.7.7-silverlight4-noexe.zip
fastjson_v1.7.7-silverlight4.zip
fastjson_v1.7.7.zip
fastjson_v1.7.zip
fastjson_v1.8-noexe.zip
fastjson_v1.8.zip
fastjson_v1.9-noexe.zip
fastjson_v1.9.1-noexe.zip
fastjson_v1.9.1.zip
fastjson_v1.9.2-noexe.zip
fastjson_v1.9.2.zip
fastjson_v1.9.3-noexe.zip
fastjson_v1.9.3.zip
fastjson_v1.9.4-noexe.zip
fastjson_v1.9.4.zip
fastjson_v1.9.6-noexe.zip
fastjson_v1.9.6.zip
fastjson_v1.9.7-noexe.zip
fastjson_v1.9.7.zip
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fastjson_v1.9.8.zip
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fastjson_v1.9.9.zip
fastjson_v1.9.zip
fastjson_v2.0.0-noexe.zip
fastjson_v2.0.0.zip
fastjson_v2.0.1-noexe.zip
fastjson_v2.0.1.zip
fastjson_v2.0.10-noexe.zip
fastjson_v2.0.10.zip
fastJSON.nuspec
fastjson_v2.0.11-noexe.zip
fastjson_v2.0.11.zip
fastJSON.nuspec
fastjson_v2.0.12-noexe.zip
fastjson_v2.0.12.zip
fastJSON.nuspec
fastjson_v2.0.13-noexe.zip
fastjson_v2.0.13.zip
fastJSON.nuspec
fastjson_v2.0.14-noexe.zip
fastjson_v2.0.14.zip
fastJSON.nuspec
fastjson_v2.0.15-noexe.zip
fastjson_v2.0.15.zip
fastJSON.nuspec
fastjson_v2.0.16-noexe.zip
fastjson_v2.0.16.zip
fastJSON.nuspec
fastjson_v2.0.17-noexe.zip
fastjson_v2.0.17.zip
fastJSON.nuspec
fastjson_v2.0.18-noexe.zip
fastjson_v2.0.18.zip
fastJSON.nuspec
fastjson_v2.0.19-noexe.zip
fastjson_v2.0.19.zip
fastJSON.nuspec
fastjson_v2.0.2-noexe.zip
fastjson_v2.0.2.zip
fastjson_v2.0.20-noexe.zip
fastjson_v2.0.20.zip
fastJSON.nuspec
fastjson_v2.0.21-noexe.zip
fastjson_v2.0.21.zip
fastJSON-SL.v11.suo
fastJSON.nuspec
fastjson_v2.0.22-noexe.zip
fastjson_v2.0.22.zip
fastJSON.snk
fastjson_v2.0.23-noexe.zip
fastjson_v2.0.23.zip
fastJSON.snk
fastjson_v2.0.24-noexe.zip
fastjson_v2.0.24.zip
fastJSON.snk
fastjson_v2.0.25-noexe.zip
fastjson_v2.0.25.zip
fastJSON.snk
fastjson_v2.0.26-noexe.zip
fastjson_v2.0.26.zip
fastJSON.snk
fastjson_v2.0.27-noexe.zip
fastjson_v2.0.27.zip
fastJSON.snk
fastJSON_v2.0.28.zip
fastJSON.snk
fastjson_v2.0.3-noexe.zip
fastjson_v2.0.3.zip
fastjson_v2.0.4-noexe.zip
fastjson_v2.0.4.zip
fastjson_v2.0.5-noexe.zip
fastjson_v2.0.5.zip
fastJSON.nuspec
fastjson_v2.0.6-noexe.zip
fastjson_v2.0.6.zip
fastJSON.nuspec
fastjson_v2.0.7-noexe.zip
fastjson_v2.0.7.zip
fastJSON.nuspec
fastjson_v2.0.8-noexe.zip
fastjson_v2.0.8.zip
fastJSON.nuspec
fastjson_v2.0.9-noexe.zip
fastjson_v2.0.9.zip
fastJSON.nuspec
fastJSON_v2.1.0.zip
fastJSON.snk
fastJSON_v2.1.1.zip
fastJSON.snk
using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection.Emit;
using System.Reflection;
using System.Collections;

namespace fastJSON
{
    internal struct Getters
    {
        public string Name;
        public Reflection.GenericGetter Getter;
        //public Type propertyType;
    }

    internal sealed class Reflection
    {
        public readonly static Reflection Instance = new Reflection();
        private Reflection()
        {
        }

        internal delegate object GenericSetter(object target, object value);
        internal delegate object GenericGetter(object obj);
        private delegate object CreateObject();

        private SafeDictionary<Type, string> _tyname = new SafeDictionary<Type, string>();
        private SafeDictionary<string, Type> _typecache = new SafeDictionary<string, Type>();
        private SafeDictionary<Type, CreateObject> _constrcache = new SafeDictionary<Type, CreateObject>();
        private SafeDictionary<Type, Getters[]> _getterscache = new SafeDictionary<Type, Getters[]>();

        #region [   PROPERTY GET SET   ]
        internal string GetTypeAssemblyName(Type t)
        {
            string val = "";
            if (_tyname.TryGetValue(t, out val))
                return val;
            else
            {
                string s = t.AssemblyQualifiedName;
                _tyname.Add(t, s);
                return s;
            }
        }

        internal Type GetTypeFromCache(string typename)
        {
            Type val = null;
            if (_typecache.TryGetValue(typename, out val))
                return val;
            else
            {
                Type t = Type.GetType(typename);
                //if (t == null) // RaptorDB : loading runtime assemblies
                //{
                //    t = Type.GetType(typename, (name) => {
                //        return AppDomain.CurrentDomain.GetAssemblies().Where(z => z.FullName == name.FullName).FirstOrDefault();
                //    }, null, true);
                //}
                _typecache.Add(typename, t);
                return t;
            }
        }

        internal object FastCreateInstance(Type objtype)
        {
            try
            {
                CreateObject c = null;
                if (_constrcache.TryGetValue(objtype, out c))
                {
                    return c();
                }
                else
                {
                    if (objtype.IsClass)
                    {
                        DynamicMethod dynMethod = new DynamicMethod("_", objtype, null);
                        ILGenerator ilGen = dynMethod.GetILGenerator();
                        ilGen.Emit(OpCodes.Newobj, objtype.GetConstructor(Type.EmptyTypes));
                        ilGen.Emit(OpCodes.Ret);
                        c = (CreateObject)dynMethod.CreateDelegate(typeof(CreateObject));
                        _constrcache.Add(objtype, c);
                    }
                    else // structs
                    {
                        DynamicMethod dynMethod = new DynamicMethod("_", typeof(object), null);
                        ILGenerator ilGen = dynMethod.GetILGenerator();
                        var lv = ilGen.DeclareLocal(objtype);
                        ilGen.Emit(OpCodes.Ldloca_S, lv);
                        ilGen.Emit(OpCodes.Initobj, objtype);
                        ilGen.Emit(OpCodes.Ldloc_0);
                        ilGen.Emit(OpCodes.Box, objtype);
                        ilGen.Emit(OpCodes.Ret);
                        c = (CreateObject)dynMethod.CreateDelegate(typeof(CreateObject));
                        _constrcache.Add(objtype, c);
                    }
                    return c();
                }
            }
            catch (Exception exc)
            {
                throw new Exception(string.Format("Failed to fast create instance for type '{0}' from assembly '{1}'",
                    objtype.FullName, objtype.AssemblyQualifiedName), exc);
            }
        }

        internal static GenericSetter CreateSetField(Type type, FieldInfo fieldInfo)
        {
            Type[] arguments = new Type[2];
            arguments[0] = arguments[1] = typeof(object);

            DynamicMethod dynamicSet = new DynamicMethod("_", typeof(object), arguments, type);

            ILGenerator il = dynamicSet.GetILGenerator();

            if (!type.IsClass) // structs
            {
                var lv = il.DeclareLocal(type);
                il.Emit(OpCodes.Ldarg_0);
                il.Emit(OpCodes.Unbox_Any, type);
                il.Emit(OpCodes.Stloc_0);
                il.Emit(OpCodes.Ldloca_S, lv);
                il.Emit(OpCodes.Ldarg_1);
                if (fieldInfo.FieldType.IsClass)
                    il.Emit(OpCodes.Castclass, fieldInfo.FieldType);
                else
                    il.Emit(OpCodes.Unbox_Any, fieldInfo.FieldType);
                il.Emit(OpCodes.Stfld, fieldInfo);
                il.Emit(OpCodes.Ldloc_0);
                il.Emit(OpCodes.Box, type);
                il.Emit(OpCodes.Ret);
            }
            else
            {
                il.Emit(OpCodes.Ldarg_0);
                il.Emit(OpCodes.Ldarg_1);
                if (fieldInfo.FieldType.IsValueType)
                    il.Emit(OpCodes.Unbox_Any, fieldInfo.FieldType);
                il.Emit(OpCodes.Stfld, fieldInfo);
                il.Emit(OpCodes.Ldarg_0);
                il.Emit(OpCodes.Ret);
            }
            return (GenericSetter)dynamicSet.CreateDelegate(typeof(GenericSetter));
        }

        internal static GenericSetter CreateSetMethod(Type type, PropertyInfo propertyInfo)
        {
            MethodInfo setMethod = propertyInfo.GetSetMethod();
            if (setMethod == null)
                return null;

            Type[] arguments = new Type[2];
            arguments[0] = arguments[1] = typeof(object);

            DynamicMethod setter = new DynamicMethod("_", typeof(object), arguments);
            ILGenerator il = setter.GetILGenerator();

            if (!type.IsClass) // structs
            {
                var lv = il.DeclareLocal(type);
                il.Emit(OpCodes.Ldarg_0);
                il.Emit(OpCodes.Unbox_Any, type);
                il.Emit(OpCodes.Stloc_0);
                il.Emit(OpCodes.Ldloca_S, lv);
                il.Emit(OpCodes.Ldarg_1);
                if (propertyInfo.PropertyType.IsClass)
                    il.Emit(OpCodes.Castclass, propertyInfo.PropertyType);
                else
                    il.Emit(OpCodes.Unbox_Any, propertyInfo.PropertyType);
                il.EmitCall(OpCodes.Call, setMethod, null);
                il.Emit(OpCodes.Ldloc_0);
                il.Emit(OpCodes.Box, type);
            }
            else
            {
                il.Emit(OpCodes.Ldarg_0);
                il.Emit(OpCodes.Castclass, propertyInfo.DeclaringType);
                il.Emit(OpCodes.Ldarg_1);
                if (propertyInfo.PropertyType.IsClass)
                    il.Emit(OpCodes.Castclass, propertyInfo.PropertyType);
                else
                    il.Emit(OpCodes.Unbox_Any, propertyInfo.PropertyType);
                il.EmitCall(OpCodes.Callvirt, setMethod, null);
                il.Emit(OpCodes.Ldarg_0);
            }

            il.Emit(OpCodes.Ret);

            return (GenericSetter)setter.CreateDelegate(typeof(GenericSetter));
        }

        internal static GenericGetter CreateGetField(Type type, FieldInfo fieldInfo)
        {
            DynamicMethod dynamicGet = new DynamicMethod("_", typeof(object), new Type[] { typeof(object) }, type);

            ILGenerator il = dynamicGet.GetILGenerator();

            if (!type.IsClass) // structs
            {
                var lv = il.DeclareLocal(type);
                il.Emit(OpCodes.Ldarg_0);
                il.Emit(OpCodes.Unbox_Any, type);
                il.Emit(OpCodes.Stloc_0);
                il.Emit(OpCodes.Ldloca_S, lv);
                il.Emit(OpCodes.Ldfld, fieldInfo);
                if (fieldInfo.FieldType.IsValueType)
                    il.Emit(OpCodes.Box, fieldInfo.FieldType);
            }
            else
            {
                il.Emit(OpCodes.Ldarg_0);
                il.Emit(OpCodes.Ldfld, fieldInfo);
                if (fieldInfo.FieldType.IsValueType)
                    il.Emit(OpCodes.Box, fieldInfo.FieldType);
            }

            il.Emit(OpCodes.Ret);

            return (GenericGetter)dynamicGet.CreateDelegate(typeof(GenericGetter));
        }

        internal static GenericGetter CreateGetMethod(Type type, PropertyInfo propertyInfo)
        {
            MethodInfo getMethod = propertyInfo.GetGetMethod();
            if (getMethod == null)
                return null;

            DynamicMethod getter = new DynamicMethod("_", typeof(object), new Type[] { typeof(object) }, type);

            ILGenerator il = getter.GetILGenerator();

            if (!type.IsClass) // structs
            {
                var lv = il.DeclareLocal(type);
                il.Emit(OpCodes.Ldarg_0);
                il.Emit(OpCodes.Unbox_Any, type);
                il.Emit(OpCodes.Stloc_0);
                il.Emit(OpCodes.Ldloca_S, lv);
                il.EmitCall(OpCodes.Call, getMethod, null);
                if (propertyInfo.PropertyType.IsValueType)
                    il.Emit(OpCodes.Box, propertyInfo.PropertyType);
            }
            else
            {
                il.Emit(OpCodes.Ldarg_0);
                il.Emit(OpCodes.Castclass, propertyInfo.DeclaringType);
                il.EmitCall(OpCodes.Callvirt, getMethod, null);
                if (propertyInfo.PropertyType.IsValueType)
                    il.Emit(OpCodes.Box, propertyInfo.PropertyType);
            }

            il.Emit(OpCodes.Ret);

            return (GenericGetter)getter.CreateDelegate(typeof(GenericGetter));
        }

        internal Getters[] GetGetters(Type type, bool showreadonly)
        {
            Getters[] val = null;
            if (_getterscache.TryGetValue(type, out val))
                return val;

            PropertyInfo[] props = type.GetProperties(BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static);
            List<Getters> getters = new List<Getters>();
            foreach (PropertyInfo p in props)
            {
                if (!p.CanWrite && showreadonly == false) continue;

                object[] att = p.GetCustomAttributes(typeof(System.Xml.Serialization.XmlIgnoreAttribute), false);
                if (att != null && att.Length > 0)
                    continue;

                GenericGetter g = CreateGetMethod(type, p);
                if (g != null)
                {
                    Getters gg = new Getters();
                    gg.Name = p.Name;
                    gg.Getter = g;
                    //gg.propertyType = p.PropertyType;
                    getters.Add(gg);
                }
            }

            FieldInfo[] fi = type.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.Static);
            foreach (var f in fi)
            {
                object[] att = f.GetCustomAttributes(typeof(System.Xml.Serialization.XmlIgnoreAttribute), false);
                if (att != null && att.Length > 0)
                    continue;

                GenericGetter g = CreateGetField(type, f);
                if (g != null)
                {
                    Getters gg = new Getters();
                    gg.Name = f.Name;
                    gg.Getter = g;
                    //gg.propertyType = f.FieldType;
                    getters.Add(gg);
                }
            }
            val = getters.ToArray();
            _getterscache.Add(type, val);
            return val;
        }

        #endregion
    }
}

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About the Author

Mehdi Gholam
Architect
United Kingdom United Kingdom
Mehdi first started programming when he was 8 on BBC+128k machine in 6512 processor language, after various hardware and software changes he eventually came across .net and c# which he has been using since v1.0.
He is formally educated as a system analyst Industrial engineer, but his programming passion continues.
 
* Mehdi is the 5th person to get 6 out of 7 Platinums on CodeProject (13th Jan'12)

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