69 lines
2.8 KiB
C#
69 lines
2.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Reflection;
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namespace CPF.Windows.Json.Deserialize
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{
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internal class BuildFactory
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{
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static BuildFactory()
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{
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var types = DeserializeBootTable.Table.ExpressionBuildTypes;
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foreach (var item in types)
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{
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ExpressionBuildTypeAttribute expressionBuildTypeAttribute = (ExpressionBuildTypeAttribute)item.GetCustomAttributes(false).First(e => e.GetType() == typeof(ExpressionBuildTypeAttribute));
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BuildMethodDics.Add(expressionBuildTypeAttribute._deserializeBuildType, item.GetMethod("Build", BindingFlags.Static | BindingFlags.NonPublic));
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}
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DeserializeBootTable.Table.ExpressionBuildTypes = null;
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}
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internal static Dictionary<Type, Expression> DEBUGSURVEY = new Dictionary<Type, Expression>();
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static Dictionary<DeserializeBuildTypeEnum, MethodInfo> BuildMethodDics = new Dictionary<DeserializeBuildTypeEnum, MethodInfo>();
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internal static ResolveDelegate<T> Build<T>(DeserializeBuildTypeEnum buildTypeEnum, params object[] objs)
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{
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ParameterExpression[] pars = { ExpressionMembers.Reader, ExpressionMembers.JsonDeserializeHandler };
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BlockExpression body = (BlockExpression)BuildMethodDics[buildTypeEnum].Invoke(null, objs);
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#if DEBUG
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Type t = typeof(T);
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DEBUGSURVEY.Add(t, body);
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#endif
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#if VIEW && NET45
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var methodBuilder = typeBuilder.DefineMethod($"Deserialize_{typeof(T).Name}", System.Reflection.MethodAttributes.Static | System.Reflection.MethodAttributes.Public, typeof(T), new Type[] { typeof(JsonReader), typeof(JsonDeserializeHandler) });
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Expression.Lambda<ResolveDelegate<T>>(
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body, pars).CompileToMethod(methodBuilder);
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#endif
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ResolveDelegate<T> action = Expression.Lambda<ResolveDelegate<T>>(body, pars).Compile();
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return action;
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}
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#if VIEW && NET45
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#if DEBUG
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static string suffix = "_Debug";
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#else
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static string suffix = "_Release";
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#endif
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static string name = $"Deserialize_CodeView{suffix}";
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static System.Reflection.Emit.AssemblyBuilder assemblyBuilder = System.Reflection.Emit.AssemblyBuilder.DefineDynamicAssembly(new System.Reflection.AssemblyName(name), System.Reflection.Emit.AssemblyBuilderAccess.RunAndSave);
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static System.Reflection.Emit.ModuleBuilder moduleBuilder = assemblyBuilder.DefineDynamicModule(name, name + ".dll");
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static System.Reflection.Emit.TypeBuilder typeBuilder = moduleBuilder.DefineType("Program");
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#endif
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internal static void Save()
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{
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#if VIEW && NET45
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typeBuilder.CreateType();
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assemblyBuilder.Save(name + ".dll");
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#endif
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}
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}
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}
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