private VariableDefinition InvokeReplacementMethod(RewriteContext context, VariableDefinition arrayVariable, bool isVoidMethod)
{
EventRewriteTarget eventTarget = context.Targets[0] as EventRewriteTarget;
var importedReplacement = GetInterceptorMethod(context.Method, isVoidMethod, eventTarget);
context.Insert(Instruction.Create(OpCodes.Ldloc, arrayVariable));
PushMethod(context, context.Method);
if (eventTarget != null)
{
PushMethod(context, context.Method.Module.Import(eventTarget.AddMethod));
PushMethod(context, context.Method.Module.Import(eventTarget.RemoveMethod));
}
context.Insert(Instruction.Create(OpCodes.Call, importedReplacement));
var interceptorResultVariable = new VariableDefinition(GetInterceptorResultType(context.Method, isVoidMethod));
context.Processor.Body.Variables.Add(interceptorResultVariable);
context.Insert(Instruction.Create(OpCodes.Stloc, interceptorResultVariable));
return(interceptorResultVariable);
}
private static MethodReference GetInterceptorMethod(MethodReference originalMethod, bool isVoidMethod, EventRewriteTarget eventTarget)
{
MethodBase replacementMethod = GetReplacementMethod(isVoidMethod, isEvent: eventTarget != null);
MethodReference importedReplacement = originalMethod.Module.Import(replacementMethod);
bool isGenericHookMethod = importedReplacement.HasGenericParameters;
if (isGenericHookMethod)
{
GenericInstanceMethod boundMethod = new GenericInstanceMethod(importedReplacement);
if (eventTarget != null)
{
boundMethod.GenericArguments.Add(originalMethod.Module.Import(eventTarget.EventHandlerType));
}
if (!isVoidMethod)
{
TypeReference returnValue = GetReturnValue(originalMethod);
boundMethod.GenericArguments.Add(returnValue);
}
importedReplacement = boundMethod;
}
return(importedReplacement);
}
private static MethodReference GetInterceptorMethod(MethodReference originalMethod, bool isVoidMethod, EventRewriteTarget eventTarget)
{
MethodBase replacementMethod = GetReplacementMethod(isVoidMethod, isEvent: eventTarget != null);
MethodReference importedReplacement = originalMethod.Module.Import(replacementMethod);
bool isGenericHookMethod = importedReplacement.HasGenericParameters;
if (isGenericHookMethod)
{
GenericInstanceMethod boundMethod = new GenericInstanceMethod(importedReplacement);
if (eventTarget != null)
{
boundMethod.GenericArguments.Add(originalMethod.Module.Import(eventTarget.EventHandlerType));
}
if (!isVoidMethod)
{
TypeReference returnValue = GetReturnValue(originalMethod);
boundMethod.GenericArguments.Add(returnValue);
}
importedReplacement = boundMethod;
}
return importedReplacement;
}
