public Type CreateInjectorType(InjectorEmitBody data, string uniqueTypeName)
{
var baseType = typeof(Injector <>).MakeGenericType(data.ContractType);
var typeBuilder = _assembly.DefineType(uniqueTypeName, baseType);
return(_injectorBuilder.BuildType(typeBuilder, data));
}
public Type GetOrCreateInjectorType(InjectorEmitBody emitBody)
{
EmitInjectorKey key;
var methodEmitBodySet = emitBody.MethodEmitBodySet;
if (methodEmitBodySet != null)
{
var injectedMethods = new MethodInfo[methodEmitBodySet.Length];
for (int i = 0; i < methodEmitBodySet.Length; i++)
{
var methodEmitBody = methodEmitBodySet[i];
injectedMethods[i] = methodEmitBody.InjectedMethod;
}
key = new EmitConstructorAndMemberInjectorKey(emitBody.ConstructorEmitBody.InjectedConstructor, injectedMethods);
}
else
{
key = new EmitInjectorKey(emitBody.ConstructorEmitBody.InjectedConstructor);
}
_injectorLock.Enter();
try
{
Type injectorType;
if (_key2Injector.TryGetValue(key, out injectorType))
{
return(injectorType);
}
injectorType = _provider.CreateInjectorType(emitBody, GetUniqueDynamicTypeName());
_key2Injector.Add(key, injectorType);
return(injectorType);
}
finally
{
_injectorLock.Exit();
}
}
static void EmitConstructor(TypeBuilder typeBuilder, InjectorEmitBody emitBody)
{
ConstructorBuilder ctorBuilder;
EmitGenerator gen;
var ctorEmitBody = emitBody.ConstructorEmitBody;
var methodEmitBodySet = emitBody.MethodEmitBodySet;
var baseType = typeBuilder.BaseType;
if (baseType == null)
{
throw new ImpossibleException();
}
var baseCtor = baseType.GetConstructor(BaseConstructorFlags, null, Type.EmptyTypes, null);
if (baseCtor == null)
{
throw new ImpossibleException();
}
if (ctorEmitBody.DependencyProviders != null && ctorEmitBody.DependencyProviders.Length > 0)
{
ctorBuilder = methodEmitBodySet != null
? DefineConstructorBuilder(typeBuilder, true, true)
: DefineConstructorBuilder(typeBuilder, true, false);
gen = ctorBuilder.GetEmitGenerator();
gen.LoadThis();
gen.CallBaseConstructor(baseCtor);
ctorEmitBody.EmitConstructorBody(typeBuilder, gen);
if (methodEmitBodySet != null)
{
var memberParameterIndex = 0;
for (int i = 0; i < methodEmitBodySet.Length; i++)
{
methodEmitBodySet[i].EmitConstructorBody(typeBuilder, gen, 2, ref memberParameterIndex);
}
}
gen.Return();
}
else
{
if (methodEmitBodySet != null)
{
ctorBuilder = DefineConstructorBuilder(typeBuilder, false, true);
gen = ctorBuilder.GetEmitGenerator();
gen.LoadThis();
gen.CallBaseConstructor(baseCtor);
var memberParameterIndex = 0;
for (int i = 0; i < methodEmitBodySet.Length; i++)
{
methodEmitBodySet[i].EmitConstructorBody(typeBuilder, gen, 1, ref memberParameterIndex);
}
gen.Return();
}
//else
//{
// //ctorBuilder = DefineConstructorBuilder(typeBuilder, false, false);
// //ctorGenerator = ctorBuilder.GetEmitGenerator();
// //ctorGenerator.LoadThis();
// //ctorGenerator.CallBaseConstructor(baseCtor);
//}
}
}
//const BindingFlags PublicStaticFlags = BindingFlags.Static | BindingFlags.Public;
//static readonly ConstructorInfo ObjectCtor;
//static readonly MethodInfo GetParametersProperty;
//static readonly MethodInfo RedundantParametersProvided;
//static EmitInjectorBuilder()
//{
// //ObjectCtor = typeof(object).GetConstructor(Type.EmptyTypes);
// //GetParametersProperty = typeof(InjectionContext).GetMethod("get_Parameters", PublicInstanceFlags, null, Type.EmptyTypes, null);
// //if (GetParametersProperty == null)
// // throw new MissingMethodException("The InjectionContext.Parameters property can not be found!");
// //RedundantParametersProvided = typeof(ParameterException).GetMethod(
// // "RedundantParametersProvided", PublicStaticFlags, null, new Type[] { typeof(InjectionContext) }, null);
// //if (RedundantParametersProvided == null)
// // throw new MissingMethodException("The ParameterException.RedundantParametersProvided method can not be found!");
//}
public Type BuildType(TypeBuilder typeBuilder, InjectorEmitBody emitBody)
{
EmitConstructor(typeBuilder, emitBody);
EmitExecuteMethod(typeBuilder, emitBody);
return(typeBuilder.CreateType());
}
static void EmitExecuteMethod(TypeBuilder typeBuilder, InjectorEmitBody emitBody)
{
var methodBuilder = DefineExecuteMethodBuilder(typeBuilder, emitBody.ContractType);
var gen = methodBuilder.GetEmitGenerator();
var ctorEmitBody = emitBody.ConstructorEmitBody;
var methodEmitBodySet = emitBody.MethodEmitBodySet;
var baseType = typeBuilder.BaseType;
if (baseType == null)
{
throw new ImpossibleException();
}
var injectInstanceIntoContextMethod = baseType.GetMethod("InjectInstanceIntoContext", PrivateInstanceFlags);
if (injectInstanceIntoContextMethod == null)
{
throw new ImpossibleException();
}
var instance = gen.DeclareLocal(ctorEmitBody.InjectedConstructor.DeclaringType);
#region Create instance
//IObjectRegistration p1;
//IConfigurationModule p2;
//ILifetimeScope p3;
//_parameterMerger.Merge(context, out p1, out p2, out p3);
//instance = new DummyClass(p1, p2, p3);
ctorEmitBody.EmitExecuteMethodBody(gen, instance);
#endregion
#region InjectInstanceIntoContext(context, instance);
gen.LoadThis();
gen.LoadArgument(1);
gen.LoadLocal(instance);
gen.CallMethod(injectInstanceIntoContextMethod);
#endregion
#region Property/Method Injection
//Parameter parameter;
//_f0.CreateObject(context, out parameter);
//instance.Parameter = parameter;
//ContainerOption option;
//_f1.CreateObject(context, out option);
//IObjectContainer container;
//_f2.CreateObject(context, out container);
//instance.SetProperties(option, container);
if (methodEmitBodySet != null)
{
for (int i = 0; i < methodEmitBodySet.Length; i++)
{
methodEmitBodySet[i].EmitExecuteMethodBody(gen, instance);
}
}
#endregion
gen.Return();
}
