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619 lines
17 KiB
C#
619 lines
17 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Data;
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using System.Globalization;
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using System.Reflection;
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using System.Reflection.Emit;
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using System.IO;
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using System.Xml;
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namespace JsonHelper
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{
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public class JSON
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{
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public readonly static JSON Instance = new JSON();
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private JSON()
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{
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}
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public bool UseOptimizedDatasetSchema = true;
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public bool UseFastGuid = true;
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public bool UseSerializerExtension = true;
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public bool SerializeNullValues = true;
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public string ToJSON(object obj)
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{
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return ToJSON(obj, UseSerializerExtension, UseFastGuid, UseOptimizedDatasetSchema, SerializeNullValues);
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}
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public string ToJSON(object obj,
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bool enableSerializerExtensions)
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{
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return ToJSON(obj, enableSerializerExtensions, UseFastGuid, UseOptimizedDatasetSchema, SerializeNullValues);
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}
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public string ToJSON(object obj,
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bool enableSerializerExtensions,
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bool enableFastGuid)
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{
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return ToJSON(obj, enableSerializerExtensions, enableFastGuid, UseOptimizedDatasetSchema, SerializeNullValues);
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}
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public string ToJSON(object obj,
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bool enableSerializerExtensions,
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bool enableFastGuid,
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bool enableOptimizedDatasetSchema,
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bool serializeNullValues)
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{
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return new JSONSerializer(enableOptimizedDatasetSchema, enableFastGuid, enableSerializerExtensions, serializeNullValues).ConvertToJSON(obj);
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}
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public object Parse(string json)
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{
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return new JsonParser(json).Decode();
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}
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public T ToObject<T>(string json)
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{
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return (T)ToObject(json, typeof(T));
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}
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public object ToObject(string json)
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{
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return ToObject(json, null);
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}
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public object ToObject(string json, Type type)
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{
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Dictionary<string, object> ht = new JsonParser(json).Decode() as Dictionary<string, object>;
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if (ht == null) return null;
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return ParseDictionary(ht, type);
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}
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#region [ PROPERTY GET SET CACHE ]
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SafeDictionary<Type, string> _tyname = new SafeDictionary<Type, string>();
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internal string GetTypeAssemblyName(Type t)
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{
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string val = "";
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if (_tyname.TryGetValue(t, out val))
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return val;
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else
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{
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string s = t.AssemblyQualifiedName;
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_tyname.Add(t, s);
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return s;
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}
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}
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SafeDictionary<string, Type> _typecache = new SafeDictionary<string, Type>();
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private Type GetTypeFromCache(string typename)
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{
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Type val = null;
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if (_typecache.TryGetValue(typename, out val))
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return val;
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else
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{
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Type t = Type.GetType(typename);
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_typecache.Add(typename, t);
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return t;
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}
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}
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SafeDictionary<Type, CreateObject> _constrcache = new SafeDictionary<Type, CreateObject>();
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private delegate object CreateObject();
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private object FastCreateInstance(Type objtype)
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{
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CreateObject c = null;
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if (_constrcache.TryGetValue(objtype, out c))
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{
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return c();
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}
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else
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{
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DynamicMethod dynMethod = new DynamicMethod("_", objtype, null);
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ILGenerator ilGen = dynMethod.GetILGenerator();
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ilGen.Emit(OpCodes.Newobj, objtype.GetConstructor(Type.EmptyTypes));
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ilGen.Emit(OpCodes.Ret);
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c = (CreateObject)dynMethod.CreateDelegate(typeof(CreateObject));
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_constrcache.Add(objtype, c);
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return c();
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}
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}
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internal struct myPropInfo
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{
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public bool filled;
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public Type pt;
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public Type bt;
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public Type changeType;
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public bool isDictionary;
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public bool isValueType;
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public bool isGenericType;
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public bool isArray;
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public bool isByteArray;
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public bool isGuid;
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public bool isDataSet;
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public bool isHashtable;
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public GenericSetter setter;
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public bool isEnum;
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public bool isDateTime;
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public Type[] GenericTypes;
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public bool isInt;
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public bool isLong;
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public bool isString;
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public bool isBool;
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public bool isClass;
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public GenericGetter getter;
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public bool isStringDictionary;
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public string Name;
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}
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SafeDictionary<string, SafeDictionary<string, myPropInfo>> _propertycache = new SafeDictionary<string, SafeDictionary<string, myPropInfo>>();
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internal SafeDictionary<string, myPropInfo> Getproperties(Type type, string typename)
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{
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SafeDictionary<string, myPropInfo> sd = null;
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if (_propertycache.TryGetValue(typename, out sd))
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{
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return sd;
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}
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else
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{
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sd = new SafeDictionary<string, myPropInfo>();
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PropertyInfo[] pr = type.GetProperties(BindingFlags.Public | BindingFlags.Instance);
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foreach (PropertyInfo p in pr)
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{
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myPropInfo d = new myPropInfo();
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d.filled = true;
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d.pt = p.PropertyType;
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d.Name = p.Name;
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d.isDictionary = p.PropertyType.Name.Contains("Dictionary");
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if (d.isDictionary)
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d.GenericTypes = p.PropertyType.GetGenericArguments();
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d.isValueType = p.PropertyType.IsValueType;
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d.isGenericType = p.PropertyType.IsGenericType;
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d.isArray = p.PropertyType.IsArray;
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if (d.isArray)
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d.bt = p.PropertyType.GetElementType();
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if (d.isGenericType)
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d.bt = p.PropertyType.GetGenericArguments()[0];
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d.isByteArray = p.PropertyType == typeof(byte[]);
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d.isGuid = (p.PropertyType == typeof(Guid) || p.PropertyType == typeof(Guid?));
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d.isHashtable = p.PropertyType == typeof(Hashtable);
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d.isDataSet = p.PropertyType == typeof(DataSet);
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d.setter = CreateSetMethod(p);
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d.changeType = GetChangeType(p.PropertyType);
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d.isEnum = p.PropertyType.IsEnum;
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d.isDateTime = p.PropertyType == typeof(DateTime) || p.PropertyType == typeof(DateTime?);
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d.isInt = p.PropertyType == typeof(int) || p.PropertyType == typeof(int?);
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d.isLong = p.PropertyType == typeof(long) || p.PropertyType == typeof(long?);
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d.isString = p.PropertyType == typeof(string);
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d.isBool = p.PropertyType == typeof(bool) || p.PropertyType == typeof(bool?);
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d.isClass = p.PropertyType.IsClass;
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d.getter = CreateGetMethod(p);
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if(d.isDictionary && d.GenericTypes[0] == typeof(string) && d.GenericTypes[1]== typeof(string))
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d.isStringDictionary = true;
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sd.Add(p.Name, d);
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}
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_propertycache.Add(typename, sd);
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return sd;
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}
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}
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internal delegate void GenericSetter(object target, object value);
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private static GenericSetter CreateSetMethod(PropertyInfo propertyInfo)
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{
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MethodInfo setMethod = propertyInfo.GetSetMethod();
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if (setMethod == null)
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return null;
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Type[] arguments = new Type[2];
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arguments[0] = arguments[1] = typeof(object);
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DynamicMethod setter = new DynamicMethod("_", typeof(void), arguments);
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ILGenerator il = setter.GetILGenerator();
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il.Emit(OpCodes.Ldarg_0);
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il.Emit(OpCodes.Castclass, propertyInfo.DeclaringType);
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il.Emit(OpCodes.Ldarg_1);
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if (propertyInfo.PropertyType.IsClass)
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il.Emit(OpCodes.Castclass, propertyInfo.PropertyType);
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else
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il.Emit(OpCodes.Unbox_Any, propertyInfo.PropertyType);
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il.EmitCall(OpCodes.Callvirt, setMethod, null);
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il.Emit(OpCodes.Ret);
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return (GenericSetter)setter.CreateDelegate(typeof(GenericSetter));
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}
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internal delegate object GenericGetter(object obj);
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private GenericGetter CreateGetMethod(PropertyInfo propertyInfo)
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{
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MethodInfo getMethod = propertyInfo.GetGetMethod();
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if (getMethod == null)
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return null;
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Type[] arguments = new Type[1];
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arguments[0] = typeof(object);
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DynamicMethod getter = new DynamicMethod("_", typeof(object), arguments);
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ILGenerator il = getter.GetILGenerator();
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il.Emit(OpCodes.Ldarg_0);
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il.Emit(OpCodes.Castclass, propertyInfo.DeclaringType);
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il.EmitCall(OpCodes.Callvirt, getMethod, null);
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if (!propertyInfo.PropertyType.IsClass)
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il.Emit(OpCodes.Box, propertyInfo.PropertyType);
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il.Emit(OpCodes.Ret);
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return (GenericGetter)getter.CreateDelegate(typeof(GenericGetter));
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}
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readonly SafeDictionary<Type, List<Getters>> _getterscache = new SafeDictionary<Type, List<Getters>>();
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internal List<Getters> GetGetters(Type type)
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{
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List<Getters> val = null;
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if (_getterscache.TryGetValue(type, out val))
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return val;
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PropertyInfo[] props = type.GetProperties(BindingFlags.Public | BindingFlags.Instance);
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List<Getters> getters = new List<Getters>();
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foreach (PropertyInfo p in props)
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{
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if (!p.CanWrite) continue;
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object[] att = p.GetCustomAttributes(typeof(System.Xml.Serialization.XmlIgnoreAttribute),false);
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if(att!=null && att.Length>0)
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continue;
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JSON.GenericGetter g = CreateGetMethod(p);
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if (g != null)
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{
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Getters gg = new Getters();
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gg.Name = p.Name;
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gg.Getter = g;
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gg.propertyType = p.PropertyType;
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getters.Add(gg);
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}
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}
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_getterscache.Add(type, getters);
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return getters;
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}
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private object ChangeType(object value, Type conversionType)
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{
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if (conversionType == typeof(int))
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return (int)CreateLong((string)value);
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else if (conversionType == typeof(long))
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return CreateLong((string)value);
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else if (conversionType == typeof(string))
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return (string)value;
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else if (conversionType == typeof(Guid))
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return CreateGuid((string)value);
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return Convert.ChangeType(value, conversionType, CultureInfo.InvariantCulture);
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}
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#endregion
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private object ParseDictionary(Dictionary<string, object> d, Type type)
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{
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object tn = "";
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bool found = d.TryGetValue("$type", out tn);
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if (found == false && type == typeof(System.Object))
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{
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return CreateDataset(d);
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}
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if (found)
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type = GetTypeFromCache((string)tn);
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if (type == null)
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throw new Exception("Cannot determine type");
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string typename = type.Name;
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object o = FastCreateInstance(type);
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SafeDictionary<string, myPropInfo> props = Getproperties(type, typename);
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foreach (string name in d.Keys)
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{
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if (name == "$map")
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{
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ProcessMap(o, props, (Dictionary<string, object>)d[name]);
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continue;
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}
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myPropInfo pi;
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if (props.TryGetValue(name, out pi) == false)
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continue;
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if (pi.filled == true)
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{
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object v = d[name];
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if (v != null)
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{
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object oset = null;
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if (pi.isInt)
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oset = (int)CreateLong((string)v);
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else if (pi.isLong)
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oset = CreateLong((string)v);
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else if (pi.isString)
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oset = (string)v;
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else if (pi.isBool)
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oset = (bool)v;
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else if (pi.isGenericType && pi.isValueType == false && pi.isDictionary == false)
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oset = CreateGenericList((ArrayList)v, pi.pt, pi.bt);
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else if (pi.isByteArray)
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oset = Convert.FromBase64String((string)v);
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else if (pi.isArray && pi.isValueType == false)
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oset = CreateArray((ArrayList)v, pi.pt, pi.bt);
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else if (pi.isGuid)
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oset = CreateGuid((string)v);
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else if (pi.isDataSet)
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oset = CreateDataset((Dictionary<string, object>)v);
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else if (pi.isStringDictionary )
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oset = CreateStringKeyDictionary((Dictionary<string, object>)v, pi.pt, pi.GenericTypes);
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else if (pi.isDictionary || pi.isHashtable)
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oset = CreateDictionary((ArrayList)v, pi.pt, pi.GenericTypes);
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else if (pi.isEnum)
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oset = CreateEnum(pi.pt, (string)v);
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else if (pi.isDateTime)
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oset = CreateDateTime((string)v);
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else if (pi.isClass && v is Dictionary<string, object>)
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oset = ParseDictionary((Dictionary<string, object>)v, pi.pt);
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else if (pi.isValueType)
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oset = ChangeType(v, pi.changeType);
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else if (v is ArrayList)
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oset = CreateArray((ArrayList)v, pi.pt, typeof(object));
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else
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oset = v;
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pi.setter(o, oset);
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}
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}
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}
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return o;
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}
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private void ProcessMap(object obj, SafeDictionary<string, JSON.myPropInfo> props, Dictionary<string, object> dic)
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{
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foreach (KeyValuePair<string, object> kv in dic)
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{
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myPropInfo p = props[kv.Key];
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object o = p.getter(obj);
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Type t = Type.GetType((string)kv.Value);
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if (t == typeof(Guid))
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p.setter(obj, CreateGuid((string)o));
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}
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}
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private long CreateLong(string s)
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{
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long num = 0;
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bool neg = false;
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foreach (char cc in s)
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{
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if (cc == '-')
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neg = true;
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else if (cc == '+')
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neg = false;
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else
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{
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num *= 10;
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num += (int)(cc - '0');
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}
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}
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return neg ? -num : num;
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}
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private object CreateEnum(Type pt, string v)
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{
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// TODO : optimize create enum
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return Enum.Parse(pt, v);
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}
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private Guid CreateGuid(string s)
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{
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if (s.Length > 30)
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return new Guid(s);
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else
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return new Guid(Convert.FromBase64String(s));
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}
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private DateTime CreateDateTime(string value)
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{
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// 0123456789012345678
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// datetime format = yyyy-MM-dd HH:mm:ss
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int year = (int)CreateLong(value.Substring(0, 4));
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int month = (int)CreateLong(value.Substring(5, 2));
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int day = (int)CreateLong(value.Substring(8, 2));
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int hour = (int)CreateLong(value.Substring(11, 2));
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int min = (int)CreateLong(value.Substring(14, 2));
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int sec = (int)CreateLong(value.Substring(17, 2));
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return new DateTime(year, month, day, hour, min, sec);
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}
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private object CreateArray(ArrayList data, Type pt, Type bt)
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{
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ArrayList col = new ArrayList();
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// create an array of objects
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foreach (object ob in data)
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{
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if (ob is IDictionary)
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col.Add(ParseDictionary((Dictionary<string, object>)ob, bt));
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else
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col.Add(ChangeType(ob, bt));
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}
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return col.ToArray(bt);
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}
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private object CreateGenericList(ArrayList data, Type pt, Type bt)
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{
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IList col = (IList)FastCreateInstance(pt);
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// create an array of objects
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foreach (object ob in data)
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{
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if (ob is IDictionary)
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col.Add(ParseDictionary((Dictionary<string, object>)ob, bt));
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else if (ob is ArrayList)
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col.Add(((ArrayList)ob).ToArray());
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else
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col.Add(ChangeType(ob, bt));
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}
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return col;
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}
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private object CreateStringKeyDictionary(Dictionary<string, object> reader, Type pt, Type[] types)
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{
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var col = (IDictionary)FastCreateInstance(pt);
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Type t1 = null;
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Type t2 = null;
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if (types != null)
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{
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t1 = types[0];
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t2 = types[1];
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}
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foreach (KeyValuePair<string, object> values in reader)
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{
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var key = values.Key;//ChangeType(values.Key, t1);
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var val = ChangeType(values.Value, t2);
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col.Add(key, val);
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}
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return col;
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}
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private object CreateDictionary(ArrayList reader, Type pt, Type[] types)
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{
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IDictionary col = (IDictionary)FastCreateInstance(pt);
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Type t1 = null;
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Type t2 = null;
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if (types != null)
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{
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t1 = types[0];
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t2 = types[1];
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}
|
|
|
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foreach (Dictionary<string, object> values in reader)
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{
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object key = values["k"];
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object val = values["v"];
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|
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if (key is Dictionary<string, object>)
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key = ParseDictionary((Dictionary<string, object>)key, t1);
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else
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key = ChangeType(key, t1);
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|
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if (val is Dictionary<string, object>)
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val = ParseDictionary((Dictionary<string, object>)val, t2);
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else
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val = ChangeType(val, t2);
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col.Add(key, val);
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}
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return col;
|
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}
|
|
|
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private Type GetChangeType(Type conversionType)
|
|
{
|
|
if (conversionType.IsGenericType && conversionType.GetGenericTypeDefinition().Equals(typeof(Nullable<>)))
|
|
return conversionType.GetGenericArguments()[0];
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|
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return conversionType;
|
|
}
|
|
|
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private DataSet CreateDataset(Dictionary<string, object> reader)
|
|
{
|
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DataSet ds = new DataSet();
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ds.EnforceConstraints = false;
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|
ds.BeginInit();
|
|
|
|
// read dataset schema here
|
|
var schema = reader["$schema"];
|
|
|
|
if (schema is string)
|
|
{
|
|
TextReader tr = new StringReader((string)schema);
|
|
ds.ReadXmlSchema(tr);
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|
}
|
|
else
|
|
{
|
|
DatasetSchema ms = (DatasetSchema)ParseDictionary((Dictionary<string, object>)schema, typeof(DatasetSchema));
|
|
ds.DataSetName = ms.Name;
|
|
for (int i = 0; i < ms.Info.Count; i += 3)
|
|
{
|
|
if (ds.Tables.Contains(ms.Info[i]) == false)
|
|
ds.Tables.Add(ms.Info[i]);
|
|
ds.Tables[ms.Info[i]].Columns.Add(ms.Info[i + 1], Type.GetType(ms.Info[i + 2]));
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|
}
|
|
}
|
|
|
|
foreach (KeyValuePair<string, object> pair in reader)
|
|
{
|
|
if (pair.Key == "$type" || pair.Key == "$schema") continue;
|
|
|
|
ArrayList rows = (ArrayList)pair.Value;
|
|
if (rows == null) continue;
|
|
|
|
DataTable dt = ds.Tables[pair.Key];
|
|
dt.BeginInit();
|
|
dt.BeginLoadData();
|
|
List<int> guidcols = new List<int>();
|
|
|
|
foreach (DataColumn c in dt.Columns)
|
|
if (c.DataType == typeof(Guid) || c.DataType == typeof(Guid?))
|
|
guidcols.Add(c.Ordinal);
|
|
|
|
foreach (ArrayList row in rows)
|
|
{
|
|
object[] v = new object[row.Count];
|
|
row.CopyTo(v, 0);
|
|
foreach (int i in guidcols)
|
|
{
|
|
string s = (string)v[i];
|
|
if (s != null && s.Length < 36)
|
|
v[i] = new Guid(Convert.FromBase64String(s));
|
|
}
|
|
dt.Rows.Add(v);
|
|
}
|
|
|
|
dt.EndLoadData();
|
|
dt.EndInit();
|
|
}
|
|
|
|
ds.EndInit();
|
|
|
|
return ds;
|
|
|
|
}
|
|
}
|
|
} |