/// <summary>
/// 构造实体类 <paramref name="entityType"/> 的代理类。
/// </summary>
/// <param name="entityType"></param>
/// <param name="entityName"></param>
/// <param name="assemblyBuilder"></param>
/// <param name="injection"></param>
/// <returns></returns>
public static Type BuildType(Type entityType, string entityName, DynamicAssemblyBuilder assemblyBuilder = null, IInjectionProvider injection = null)
{
var typeBuilder = assemblyBuilder.DefineType(entityName ?? entityType.Name, baseType: entityType);
typeBuilder.ImplementInterface(typeof(ICompiledEntity));
typeBuilder.SetCustomAttribute(() => new SerializableAttribute());
var properties = from s in entityType.GetProperties()
let getMth = s.GetGetMethod()
where getMth.IsVirtual && !getMth.IsFinal
select s;
foreach (var property in properties)
{
var propertyBuilder = typeBuilder.DefineProperty(property.Name, property.PropertyType);
var get = property.GetGetMethod();
var set = property.GetSetMethod();
var isEnum = property.PropertyType.GetNonNullableType().IsEnum;
var opType = isEnum ? typeof(Enum) : property.PropertyType;
if (get != null)
{
var op_Explicit = typeof(PropertyValue).GetMethods().FirstOrDefault(s => s.Name == "op_Explicit" && s.ReturnType == opType);
propertyBuilder.DefineGetMethod(ilCoding: code =>
{
code.Emitter.DeclareLocal(get.ReturnType);
code.Emitter
.nop
.ldarg_0
.ldtoken(entityType)
.call(MthTypeGetTypeFromHandle)
.ldstr(property.Name)
.call(MthGetProperty)
.call(MthGetValue)
.Assert(op_Explicit != null, e1 => e1.call(op_Explicit), e1 => e1.call(MthPVGetValue).castclass(opType))
.Assert(isEnum, e1 => e1.unbox_any(property.PropertyType))
.stloc_0
.ldloc_0
.ret();
});
}
if (set != null)
{
var op_Implicit = typeof(PropertyValue).GetMethods().FirstOrDefault(s => s.Name == "op_Implicit" && s.GetParameters()[0].ParameterType == opType);
propertyBuilder.DefineSetMethod(ilCoding: code =>
{
code.Emitter
.nop
.ldarg_0
.ldtoken(entityType)
.call(MthTypeGetTypeFromHandle)
.ldstr(property.Name)
.call(MthGetProperty)
.ldarg_1
.Assert(isEnum, e1 => e1.box(property.PropertyType))
.Assert(op_Implicit != null, e1 => e1.call(op_Implicit), e1 => e1.ldnull.call(MthPVNewValue))
.call(MthSetValue)
.nop
.ret();
});
}
}
var initMethod = typeBuilder.DefineMethod("InitializeValue",
parameterTypes: new[] { typeof(IProperty), typeof(PropertyValue) },
ilCoding: code =>
{
code.Emitter.
ldarg_0.ldarg_1.ldarg_2.
callvirt(MthInitValue).ret();
});
injection?.Inject(entityType, assemblyBuilder, typeBuilder);
return(typeBuilder.CreateType());
}
/// <summary>
/// 构造实体类 <paramref name="entityType"/> 的代理类。
/// </summary>
/// <param name="entityType"></param>
/// <param name="entityName"></param>
/// <param name="assemblyBuilder"></param>
/// <param name="injection"></param>
/// <returns></returns>
public static Type BuildType(Type entityType, string entityName, DynamicAssemblyBuilder assemblyBuilder = null, IInjectionProvider injection = null)
{
var typeBuilder = assemblyBuilder.DefineType(entityName ?? entityType.Name, baseType: entityType);
typeBuilder.ImplementInterface(typeof(ICompiledEntity));
typeBuilder.SetCustomAttribute(() => new SerializableAttribute());
//重写构造器
foreach (var cons in entityType.GetConstructors(BindingFlags.Public | BindingFlags.Instance))
{
var parameters = cons.GetParameters();
typeBuilder.DefineConstructor(parameters.Select(s => s.ParameterType).ToArray()).AppendCode(e =>
{
e.ldarg_0.For(0, parameters.Length, (b, i) => b.ldarg(i + 1))
.call(cons).nop.ret();
});
}
//重写属性
var properties = from s in entityType.GetProperties()
let getMth = s.GetGetMethod()
where getMth.IsVirtual && !getMth.IsFinal
select s;
foreach (var property in properties)
{
var propertyBuilder = typeBuilder.DefineProperty(property.Name, property.PropertyType);
var get = property.GetGetMethod();
var set = property.GetSetMethod();
var isEnum = property.PropertyType.GetNonNullableType().IsEnum;
var opType = isEnum ? typeof(Enum) : property.PropertyType;
if (get != null)
{
var op_Explicit = ReflectionCache.GetMember("PropertyValue_Explicit", opType, "op_Explicit", (k, n) => typeof(PropertyValue).GetMethods().FirstOrDefault(s => s.Name == n && s.ReturnType == k));
propertyBuilder.DefineGetMethod(ilCoding: code =>
{
code.Emitter.DeclareLocal(typeof(PropertyValue));
code.Emitter.DeclareLocal(get.ReturnType);
code.Emitter
.nop
.ldarg_0
.ldtoken(entityType)
.call(MethodCache.TypeGetTypeFromHandle)
.ldstr(property.Name)
.call(MethodCache.GetProperty)
.call(MethodCache.GetValue)
.Assert(op_Explicit != null, e1 => e1.call(op_Explicit),
e1 => e1.call(MethodCache.PVGetValue.MakeGenericMethod(property.PropertyType)))
.Assert(isEnum, e1 => e1.unbox_any(property.PropertyType))
.stloc_1
.ldloc_1
.ret();
});
}
if (set != null)
{
var op_Implicit = ReflectionCache.GetMember("PropertyValue_Implicit", opType, "op_Implicit", (k, n) => typeof(PropertyValue).GetMethods().FirstOrDefault(s => s.Name == n && s.GetParameters()[0].ParameterType == k));
propertyBuilder.DefineSetMethod(ilCoding: code =>
{
code.Emitter
.nop
.ldarg_0
.ldtoken(entityType)
.call(MethodCache.TypeGetTypeFromHandle)
.ldstr(property.Name)
.call(MethodCache.GetProperty)
.ldarg_1
.Assert(isEnum, e1 => e1.box(property.PropertyType))
.Assert(op_Implicit != null, e1 => e1.call(op_Implicit),
e1 => e1.ldtoken(property.PropertyType).call(MethodCache.TypeGetTypeFromHandle).call(MethodCache.PVNewValue))
.call(MethodCache.SetValue)
.nop
.ret();
});
}
}
var initMethod = typeBuilder.DefineMethod("InitializeValue",
parameterTypes: new[] { typeof(IProperty), typeof(PropertyValue) },
ilCoding: code =>
{
code.Emitter.
ldarg_0.ldarg_1.ldarg_2.
callvirt(MethodCache.InitValue).ret();
});
injection?.Inject(new EntityInjectionContext
{
EntityType = entityType,
AssemblyBuilder = assemblyBuilder,
TypeBuilder = typeBuilder
});
return(typeBuilder.CreateType());
}