protected MethodEmitter ImplementProxiedMethod(
Type targetType,
MethodEmitter methodEmitter,
MethodInfo method,
ClassEmitter emitter,
NestedClassEmitter invocationImpl,
FieldReference interceptorsField,
Reference targetRef,
ConstructorVersion version,
MethodInfo methodOnTarget)
{
CheckNotGenericTypeDefinition(targetType, "targetType");
methodEmitter.CopyParametersAndReturnTypeFrom(method, emitter);
TypeReference[] dereferencedArguments = IndirectReference.WrapIfByRef(methodEmitter.Arguments);
Type iinvocation = invocationImpl.TypeBuilder;
Trace.Assert(method.IsGenericMethod == iinvocation.IsGenericTypeDefinition);
bool isGenericInvocationClass = false;
Type[] genericMethodArgs = new Type[0];
if (method.IsGenericMethod)
{
// bind generic method arguments to invocation's type arguments
genericMethodArgs = methodEmitter.MethodBuilder.GetGenericArguments();
iinvocation = iinvocation.MakeGenericType(genericMethodArgs);
isGenericInvocationClass = true;
}
LocalReference invocationImplLocal = methodEmitter.CodeBuilder.DeclareLocal(iinvocation);
// TODO: Initialize iinvocation instance
// with ordinary arguments and in and out arguments
Expression interceptors;
// if (useSelector)
{
// TODO: Generate code that checks the return of selector
// if no interceptors is returned, should we invoke the base.Method directly?
}
// else
{
interceptors = interceptorsField.ToExpression();
}
Expression typeTokenFieldExp = typeTokenField.ToExpression();
Expression methodInfoTokenExp;
if (method2TokenField.ContainsKey(method)) // Token is in the cache
{
methodInfoTokenExp = ((FieldReference) method2TokenField[method]).ToExpression();
}
else
{
// Not in the cache: generic method
methodInfoTokenExp = new MethodTokenExpression(method.MakeGenericMethod(genericMethodArgs));
}
ConstructorInfo constructor = invocationImpl.Constructors[0].ConstructorBuilder;
if (isGenericInvocationClass)
{
constructor = TypeBuilder.GetConstructor(iinvocation, invocationImpl.Constructors[0].ConstructorBuilder);
}
NewInstanceExpression newInvocImpl;
if (version == ConstructorVersion.WithTargetMethod)
{
Expression methodOnTargetTokenExp;
if (method2TokenField.ContainsKey(methodOnTarget)) // Token is in the cache
{
methodOnTargetTokenExp = ((FieldReference) method2TokenField[methodOnTarget]).ToExpression();
}
else
{
// Not in the cache: generic method
methodOnTargetTokenExp = new MethodTokenExpression(methodOnTarget.MakeGenericMethod(genericMethodArgs));
}
newInvocImpl =
new NewInstanceExpression(constructor,
targetRef.ToExpression(),
interceptors,
typeTokenFieldExp,
methodOnTargetTokenExp,
methodInfoTokenExp,
new ReferencesToObjectArrayExpression(dereferencedArguments),
SelfReference.Self.ToExpression());
}
else
{
newInvocImpl =
new NewInstanceExpression(constructor,
targetRef.ToExpression(),
interceptors,
typeTokenFieldExp,
methodInfoTokenExp,
new ReferencesToObjectArrayExpression(dereferencedArguments),
SelfReference.Self.ToExpression());
}
methodEmitter.CodeBuilder.AddStatement(new AssignStatement(invocationImplLocal, newInvocImpl));
if (method.ContainsGenericParameters)
{
EmitLoadGenricMethodArguments(methodEmitter, method.MakeGenericMethod(genericMethodArgs), invocationImplLocal);
}
methodEmitter.CodeBuilder.AddStatement(
new ExpressionStatement(new MethodInvocationExpression(invocationImplLocal, Constants.AbstractInvocationProceed)));
CopyOutAndRefParameters(dereferencedArguments, invocationImplLocal, method, methodEmitter);
if (method.ReturnType != typeof(void))
{
// Emit code to return with cast from ReturnValue
MethodInvocationExpression getRetVal =
new MethodInvocationExpression(invocationImplLocal, typeof(AbstractInvocation).GetMethod("get_ReturnValue"));
methodEmitter.CodeBuilder.AddStatement(
new ReturnStatement(new ConvertExpression(methodEmitter.ReturnType, getRetVal)));
}
else
{
methodEmitter.CodeBuilder.AddStatement(new ReturnStatement());
}
return methodEmitter;
}
private Expression[] GetAllArgs(Expression[] args, Reference targetField)
{
var allArgs = new Expression[args.Length + 1];
args.CopyTo(allArgs, 1);
allArgs[0] = new ConvertExpression(targetType, targetField.ToExpression());
return allArgs;
}
protected MethodEmitter ImplementProxiedMethod(
Type targetType,
MethodEmitter methodEmitter,
MethodInfo method,
ClassEmitter emitter,
NestedClassEmitter invocationImpl,
FieldReference interceptorsField,
Reference targetRef,
ConstructorVersion version,
MethodInfo methodOnTarget)
{
CheckNotGenericTypeDefinition(targetType, "targetType");
methodEmitter.CopyParametersAndReturnTypeFrom(method, emitter);
TypeReference[] dereferencedArguments = IndirectReference.WrapIfByRef(methodEmitter.Arguments);
Type iinvocation = invocationImpl.TypeBuilder;
Trace.Assert(method.IsGenericMethod == iinvocation.IsGenericTypeDefinition);
bool isGenericInvocationClass = false;
Type[] genericMethodArgs = new Type[0];
if (method.IsGenericMethod)
{
// bind generic method arguments to invocation's type arguments
genericMethodArgs = methodEmitter.MethodBuilder.GetGenericArguments();
iinvocation = iinvocation.MakeGenericType(genericMethodArgs);
isGenericInvocationClass = true;
}
Expression typeTokenFieldExp = typeTokenField.ToExpression();
Expression methodInfoTokenExp;
string tokenFieldName;
if (method2TokenField.ContainsKey(method)) // Token is in the cache
{
FieldReference methodTokenField = method2TokenField[method];
tokenFieldName = methodTokenField.Reference.Name;
methodInfoTokenExp = methodTokenField.ToExpression();
}
else
{
// Not in the cache: generic method
MethodInfo genericMethod = method.MakeGenericMethod(genericMethodArgs);
// Need random suffix added to the name, so that we don't end up with duplicate field names for
// methods with the same name, but different generic parameters
tokenFieldName = string.Format("{0}_{1}_{2}", genericMethod.Name, genericMethodArgs.Length,
Guid.NewGuid().ToString("N"));
methodInfoTokenExp = new MethodTokenExpression(genericMethod);
}
LocalReference invocationImplLocal = methodEmitter.CodeBuilder.DeclareLocal(iinvocation);
// TODO: Initialize iinvocation instance with ordinary arguments and in and out arguments
Expression interceptors = interceptorsField.ToExpression();
// Create the field to store the selected interceptors for this method if an InterceptorSelector is specified
FieldReference methodInterceptors = null;
if (proxyGenerationOptions.Selector != null)
{
// If no interceptors are returned, should we invoke the base.Method directly? Looks like we should not.
methodInterceptors = emitter.CreateField(string.Format("{0}_interceptors", tokenFieldName), typeof(IInterceptor[]));
}
ConstructorInfo constructor = invocationImpl.Constructors[0].ConstructorBuilder;
if (isGenericInvocationClass)
{
constructor = TypeBuilder.GetConstructor(iinvocation, constructor);
}
NewInstanceExpression newInvocImpl;
if (version == ConstructorVersion.WithTargetMethod)
{
Expression methodOnTargetTokenExp;
if (method2TokenField.ContainsKey(methodOnTarget)) // Token is in the cache
{
methodOnTargetTokenExp = method2TokenField[methodOnTarget].ToExpression();
}
else
{
// Not in the cache: generic method
methodOnTargetTokenExp = new MethodTokenExpression(methodOnTarget.MakeGenericMethod(genericMethodArgs));
}
if (methodInterceptors == null)
{
newInvocImpl = //actual contructor call
new NewInstanceExpression(constructor,
targetRef.ToExpression(),
interceptors,
typeTokenFieldExp,
methodOnTargetTokenExp,
methodInfoTokenExp,
new ReferencesToObjectArrayExpression(dereferencedArguments),
SelfReference.Self.ToExpression());
}
else
{
MethodInvocationExpression methodInvocationExpression =
new MethodInvocationExpression(proxyGenerationOptionsField, proxyGenerationOptions_Selector);
methodInvocationExpression.VirtualCall = true;
newInvocImpl = //actual contructor call
new NewInstanceExpression(constructor,
targetRef.ToExpression(),
interceptors,
typeTokenFieldExp,
methodOnTargetTokenExp,
methodInfoTokenExp,
new ReferencesToObjectArrayExpression(dereferencedArguments),
SelfReference.Self.ToExpression(),
methodInvocationExpression,
new AddressOfReferenceExpression(methodInterceptors));
}
}
else
{
if (methodInterceptors == null)
{
newInvocImpl =
new NewInstanceExpression(constructor,
targetRef.ToExpression(),
interceptors,
typeTokenFieldExp,
methodInfoTokenExp,
new ReferencesToObjectArrayExpression(dereferencedArguments),
SelfReference.Self.ToExpression());
}
else
{
MethodInvocationExpression methodInvocationExpression =
new MethodInvocationExpression(proxyGenerationOptionsField, proxyGenerationOptions_Selector);
methodInvocationExpression.VirtualCall = true;
newInvocImpl =
new NewInstanceExpression(constructor,
targetRef.ToExpression(),
interceptors,
typeTokenFieldExp,
methodInfoTokenExp,
new ReferencesToObjectArrayExpression(dereferencedArguments),
SelfReference.Self.ToExpression(),
methodInvocationExpression,
new AddressOfReferenceExpression(methodInterceptors));
}
}
methodEmitter.CodeBuilder.AddStatement(new AssignStatement(invocationImplLocal, newInvocImpl));
if (method.ContainsGenericParameters)
{
EmitLoadGenricMethodArguments(methodEmitter, method.MakeGenericMethod(genericMethodArgs), invocationImplLocal);
}
methodEmitter.CodeBuilder.AddStatement(
new ExpressionStatement(new MethodInvocationExpression(invocationImplLocal, Constants.AbstractInvocationProceed)));
CopyOutAndRefParameters(dereferencedArguments, invocationImplLocal, method, methodEmitter);
if (method.ReturnType != typeof(void))
{
// Emit code to return with cast from ReturnValue
MethodInvocationExpression getRetVal =
new MethodInvocationExpression(invocationImplLocal, typeof(AbstractInvocation).GetMethod("get_ReturnValue"));
methodEmitter.CodeBuilder.AddStatement(
new ReturnStatement(new ConvertExpression(methodEmitter.ReturnType, getRetVal)));
}
else
{
methodEmitter.CodeBuilder.AddStatement(new ReturnStatement());
}
return methodEmitter;
}