private static MethodExecutor WrapVoidAction(VoidMethodExecutor executor)
{
return(delegate(object target, object[] parameters) {
executor(target, parameters);
return null;
});
}
private static FastInvokeHandler WrapVoidMethod(VoidMethodExecutor executor)
{
return(delegate(object target, object[] parameters)
{
executor(target, parameters);
return null;
});
}
private static MethodExecutor CreateVoidMethodWrapper(VoidMethodExecutor executor)
{
return(delegate(object target, object[] parameters)
{
executor(target, parameters);
return null;
});
}
private static MethodExecutor WrapVoidAction(VoidMethodExecutor executor)
{
return delegate(object target, object[] parameters)
{
executor(target, parameters);
return null;
};
}
private static MethodExecutor CreateVoidMethodWrapper(VoidMethodExecutor executor)
{
return delegate(object target, object[] parameters)
{
executor(target, parameters);
return null;
};
}
private static MethodExecutor GetExecutor(MethodInfo methodInfo)
{
// Parameters to executor
ParameterExpression targetParameter = Expression.Parameter(typeof(object), "target");
ParameterExpression parametersParameter = Expression.Parameter(typeof(object[]), "parameters");
// Build parameter list
List <Expression> parameters = new List <Expression>();
ParameterInfo[] paramInfos = methodInfo.GetParameters();
for (int i = 0; i < paramInfos.Length; i++)
{
ParameterInfo paramInfo = paramInfos[i];
BinaryExpression valueObj = Expression.ArrayIndex(parametersParameter, Expression.Constant(i));
UnaryExpression valueCast = Expression.Convert(valueObj, paramInfo.ParameterType);
// valueCast is "(Ti) parameters[i]"
parameters.Add(valueCast);
}
// Call method
UnaryExpression targetCast = (!methodInfo.IsStatic) ? Expression.Convert(targetParameter, methodInfo.ReflectedType) : null;
MethodCallExpression methodCall = methodCall = Expression.Call(targetCast, methodInfo, parameters);
// methodCall is "((TTarget) target) method((T0) parameters[0], (T1) parameters[1], ...)"
// Create function
if (methodCall.Type == typeof(void))
{
Expression <VoidMethodExecutor> lambda = Expression.Lambda <VoidMethodExecutor>(methodCall, targetParameter, parametersParameter);
VoidMethodExecutor voidExecutor = lambda.Compile();
return(WrapVoidAction(voidExecutor));
}
else
{
// must coerce methodCall to match ActionExecutor signature
UnaryExpression castMethodCall = Expression.Convert(methodCall, typeof(object));
Expression <MethodExecutor> lambda = Expression.Lambda <MethodExecutor>(castMethodCall, targetParameter, parametersParameter);
return(lambda.Compile());
}
}
