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@@ -1,214 +0,0 @@
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-#region << Version-v2 >>
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-/*
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- * ========================================================================
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- * Version： v2
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- * Time ： 2024-06-29
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- * Author ： lith
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- * Email ： serset@yeah.net
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- * Remarks：
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- * ========================================================================
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-*/
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-#endregion
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-
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-using System.Reflection;
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-using System.Reflection.Emit;
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-
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-namespace Vit.DynamicCompile.EntityGenerate
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-{
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- /*
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-// https://www.cnblogs.com/sesametech-dotnet/p/13176329.html
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-// https://learn.microsoft.com/zh-cn/dotnet/api/system.reflection.emit.constructorbuilder?view=net-8.0
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-
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-<ItemGroup>
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- <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
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- <PackageReference Include="System.Reflection.Emit" Version="4.7.0" />
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-</ItemGroup>
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- */
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-
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- public class EntityGenerator
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- {
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- public static CustomAttributeBuilder GetAttributeBuilder<CustomAttribute>(
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- IEnumerable<(Type type, object value)> constructorArgs = null
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- , IEnumerable<(string name, object value)> propertyValues = null
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- )
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- where CustomAttribute : Attribute
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- {
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- constructorArgs ??= new List<(Type type, object value)>();
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- propertyValues ??= new List<(string name, object value)>();
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-
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- var type = typeof(CustomAttribute);
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- var ci = type.GetConstructor(constructorArgs.Select(m => m.type).ToArray());
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- var builder = new CustomAttributeBuilder(
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- ci
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- , constructorArgs.Select(m => m.value).ToArray()
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- , propertyValues.Select(property => type.GetProperty(property.name)).ToArray()
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- , propertyValues.Select(m => m.value).ToArray()
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- );
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- return builder;
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- }
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-
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- public static CustomAttributeBuilder GetAttributeBuilder<CustomAttribute>
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- (IEnumerable<object> constructorArgs, IEnumerable<(string name, object value)> propertyValues = null)
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- where CustomAttribute : Attribute
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- => GetAttributeBuilder<CustomAttribute>(constructorArgs.Select(value => (value.GetType(), value)), propertyValues);
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-
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-
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- public static Type CreateType(TypeDescriptor typeDescriptor)
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- {
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- // #1 define Type
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- var assemblyName = new AssemblyName(typeDescriptor.assemblyName);
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- var dynamicAssembly = AssemblyBuilder.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Run);
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- var dynamicModule = dynamicAssembly.DefineDynamicModule(typeDescriptor.moduleName);
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- var typeBuilder = dynamicModule.DefineType(typeDescriptor.typeName,
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- TypeAttributes.Public |
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- TypeAttributes.Class |
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- TypeAttributes.AutoClass |
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- TypeAttributes.AnsiClass |
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- TypeAttributes.BeforeFieldInit |
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- TypeAttributes.AutoLayout,
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- null); // This is the type of class to derive from. Use null if there isn't one
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-
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- typeBuilder.DefineDefaultConstructor(MethodAttributes.Public |
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- MethodAttributes.SpecialName |
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- MethodAttributes.RTSpecialName);
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-
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- // #2 Add Property
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- typeDescriptor.properties?.ForEach(property => AddProperty(typeBuilder, property));
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-
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-
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- // #3 attributes
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- typeDescriptor.attributes?.ForEach(attribute => typeBuilder.SetCustomAttribute(attribute));
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-
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- var generatedType = typeBuilder.CreateTypeInfo().AsType();
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- return generatedType;
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- }
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- private static void AddProperty(TypeBuilder typeBuilder, PropertyDescriptor propertyDescriptor)
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- {
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- var propertyName = propertyDescriptor.name;
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- var propertyType = propertyDescriptor.type;
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-
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- // #1 field
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- var fieldBuilder = typeBuilder.DefineField("_" + propertyName, propertyType, FieldAttributes.Private);
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- var propertyBuilder = typeBuilder.DefineProperty(propertyName, PropertyAttributes.HasDefault, propertyType, null);
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-
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- // #2 get
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- {
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- var getMethod = typeBuilder.DefineMethod("get_" + propertyName,
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- MethodAttributes.Public |
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- MethodAttributes.SpecialName |
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- MethodAttributes.HideBySig, propertyType, Type.EmptyTypes);
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- var getMethodIL = getMethod.GetILGenerator();
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- getMethodIL.Emit(OpCodes.Ldarg_0);
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- getMethodIL.Emit(OpCodes.Ldfld, fieldBuilder);
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- getMethodIL.Emit(OpCodes.Ret);
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-
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- propertyBuilder.SetGetMethod(getMethod);
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- }
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-
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- // #3 set
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- {
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- var setMethod = typeBuilder.DefineMethod("set_" + propertyName,
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- MethodAttributes.Public |
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- MethodAttributes.SpecialName |
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- MethodAttributes.HideBySig,
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- null, new[] { propertyType });
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- var setMethodIL = setMethod.GetILGenerator();
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- Label modifyProperty = setMethodIL.DefineLabel();
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- Label exitSet = setMethodIL.DefineLabel();
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-
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- setMethodIL.MarkLabel(modifyProperty);
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- setMethodIL.Emit(OpCodes.Ldarg_0);
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- setMethodIL.Emit(OpCodes.Ldarg_1);
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- setMethodIL.Emit(OpCodes.Stfld, fieldBuilder);
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- setMethodIL.Emit(OpCodes.Nop);
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- setMethodIL.MarkLabel(exitSet);
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- setMethodIL.Emit(OpCodes.Ret);
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-
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- propertyBuilder.SetSetMethod(setMethod);
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- }
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-
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- // #4 attributes
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- propertyDescriptor.attributes?.ForEach(attribute => propertyBuilder.SetCustomAttribute(attribute));
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- }
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- }
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-
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-
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-
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-
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- #region TypeDescriptor
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- public class TypeDescriptor
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- {
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- public string assemblyName;
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- public string moduleName;
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- /// <summary>
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- /// The full path of the type. name cannot contain embedded nulls.
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- /// </summary>
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- public string typeName;
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-
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- public List<CustomAttributeBuilder> attributes;
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-
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- public List<PropertyDescriptor> properties;
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-
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- public TypeDescriptor() { }
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-
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- public TypeDescriptor(Dictionary<string, Type> propertiesMap)
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- {
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- assemblyName = Guid.NewGuid().ToString();
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- moduleName = "Main";
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- typeName = "DynamicClass";
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- properties = propertiesMap.AsEnumerable().Select(kv => new PropertyDescriptor { name = kv.Key, type = kv.Value }).ToList();
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- }
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-
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- public TypeDescriptor AddAttribute<CustomAttribute>(
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- IEnumerable<(Type type, object value)> constructorArgs = null
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- , IEnumerable<(string name, object value)> propertyValues = null
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- )
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- where CustomAttribute : Attribute
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- {
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- attributes ??= new();
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- attributes.Add(EntityGenerator.GetAttributeBuilder<CustomAttribute>(constructorArgs, propertyValues));
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- return this;
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- }
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- public TypeDescriptor AddAttribute<CustomAttribute>(IEnumerable<object> constructorArgs, IEnumerable<(string name, object value)> propertyValues = null)
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- where CustomAttribute : Attribute
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- => AddAttribute<CustomAttribute>(constructorArgs.Select(value => (value.GetType(), value)), propertyValues);
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-
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-
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- public TypeDescriptor AddProperty(PropertyDescriptor property)
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- {
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- properties ??= new();
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- properties.Add(property);
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- return this;
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- }
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- }
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-
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- public class PropertyDescriptor
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- {
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- public string name;
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- public Type type;
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- public List<CustomAttributeBuilder> attributes;
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-
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-
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- public PropertyDescriptor() { }
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- public PropertyDescriptor(string name, Type type) { this.name = name; this.type = type; }
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-
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- public static PropertyDescriptor New<ValueType>(string name) => new PropertyDescriptor(name, typeof(ValueType));
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-
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-
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- public PropertyDescriptor AddAttribute<CustomAttribute>(
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- IEnumerable<(Type type, object value)> constructorArgs = null
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- , IEnumerable<(string name, object value)> propertyValues = null
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- )
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- where CustomAttribute : Attribute
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- {
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- attributes ??= new();
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- attributes.Add(EntityGenerator.GetAttributeBuilder<CustomAttribute>(constructorArgs, propertyValues));
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- return this;
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- }
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- public PropertyDescriptor AddAttribute<CustomAttribute>(IEnumerable<object> constructorArgs, IEnumerable<(string name, object value)> propertyValues = null)
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- where CustomAttribute : Attribute
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- => AddAttribute<CustomAttribute>(constructorArgs.Select(value => (value.GetType(), value)), propertyValues);
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- }
|
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- #endregion
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-
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-}
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