private void AddSingletonFactoryCreateMethod(Type valueType)
{
var singletonFieldBuilder = TypeBuilder.DefineField("_singleton", valueType, FieldAttributes.Private);
var ilGenerator = _methodBuilder.GetILGenerator();
var label = ilGenerator.DefineLabel();
ilGenerator.DeclareLocal(valueType);
ilGenerator.Emit(OpCodes.Ldarg_0);
ilGenerator.Emit(OpCodes.Ldfld, singletonFieldBuilder);
ilGenerator.Emit(OpCodes.Brtrue_S, label);
ilGenerator.Emit(OpCodes.Ldarg_0);
foreach (var constructorParameterType in ConstructorFieldBuilders)
{
var constructorParameterBuilders = ContainerConstruction.GetOrAddFactoryBuilder(constructorParameterType.Key);
ilGenerator.Emit(OpCodes.Ldarg_0);
ilGenerator.Emit(OpCodes.Ldfld, constructorParameterType.Value);
ilGenerator.Emit(OpCodes.Callvirt, constructorParameterBuilders.MethodBuilder);
ilGenerator.Emit(OpCodes.Castclass, constructorParameterType.Key);
}
ilGenerator.Emit(OpCodes.Newobj, valueType.GetPublicConstructor());
ilGenerator.Emit(OpCodes.Stfld, singletonFieldBuilder);
ilGenerator.MarkLabel(label);
ilGenerator.Emit(OpCodes.Ldarg_0);
ilGenerator.Emit(OpCodes.Ldfld, singletonFieldBuilder);
ilGenerator.Emit(OpCodes.Ret);
var createMethod = typeof(IFactory).GetRuntimeMethod(nameof(IFactory.Get), new Type[0]);
TypeBuilder.DefineMethodOverride(_methodBuilder, createMethod);
}
public IFactory Create(Type keyType)
{
var factoryBuilder = ContainerConstruction.GetOrAddFactoryBuilder(keyType);
var constructorArgs = factoryBuilder.ValueType.GetPublicConstructor().GetConstructorParameterTypes().Select(Create).Cast <object>().ToArray();
return((IFactory)Activator.CreateInstance(factoryBuilder.TypeBuilder.CreateTypeInfo().AsType(), constructorArgs.Length == 0 ? null : constructorArgs));
}
private void AddTransientFactoryCreateMethod(Type valueType)
{
var ilGenerator = _methodBuilder.GetILGenerator();
foreach (var constructorParameterType in ConstructorFieldBuilders)
{
var constructorParameterBuilders = ContainerConstruction.GetOrAddFactoryBuilder(constructorParameterType.Key);
ilGenerator.Emit(OpCodes.Ldarg_0);
ilGenerator.Emit(OpCodes.Ldfld, constructorParameterType.Value);
ilGenerator.Emit(OpCodes.Callvirt, constructorParameterBuilders.MethodBuilder);
ilGenerator.Emit(OpCodes.Castclass, constructorParameterType.Key);
}
ilGenerator.Emit(OpCodes.Newobj, valueType.GetPublicConstructor());
ilGenerator.Emit(OpCodes.Ret);
var createMethod = typeof(IFactory).GetRuntimeMethod("Get", new Type[0]);
_typeBuilder.DefineMethodOverride(_methodBuilder, createMethod);
}
protected void AddConstructor(Type valueType, TypeBuilder typeBuilder)
{
var constructorParameterTypes = valueType.GetPublicConstructor().GetConstructorParameterTypes();
if (constructorParameterTypes.Length == 0)
{
return;
}
var constructorTypes = constructorParameterTypes.Select(x => new { ConstructorType = x, FactoryType = ContainerConstruction.GetOrAddFactoryBuilder(x).TypeBuilder.AsType() }).ToArray();
var constructorBuilder = typeBuilder.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, constructorTypes.Select(x => x.FactoryType).ToArray());
var ilGenerator = constructorBuilder.GetILGenerator();
ilGenerator.DeclareLocal(valueType);
ilGenerator.Emit(OpCodes.Ldarg_0);
ilGenerator.Emit(OpCodes.Call, typeof(object).GetTypeInfo().DeclaredConstructors.First());
var parameterCounter = 0;
foreach (var constructorType in constructorTypes)
{
var fieldBuilder = typeBuilder.DefineField($"_field{++parameterCounter}", constructorType.FactoryType, FieldAttributes.Private);
ilGenerator.Emit(OpCodes.Ldarg_0);
ilGenerator.Emit(OpCodes.Ldarg_S, parameterCounter);
ilGenerator.Emit(OpCodes.Stfld, fieldBuilder);
ConstructorFieldBuilders.Add(constructorType.ConstructorType, fieldBuilder);
}
ilGenerator.Emit(OpCodes.Ret);
}
