[Insight-developers] Having mysterious problem with ObjectFactories -- HELP!!

[Williams, Norman K]

OK. So I changed ObjectFactoryBase::InitializeFactoryList() thusly:


void
ObjectFactoryBase
::InitializeFactoryList()
{
  CleanUpObjectFactoryGlobal.Use();
  /**
   * Don't do anything if we are already initialized
   */
  if ( ObjectFactoryBase::m_RegisteredFactories == 0)
    {
    ObjectFactoryBase::m_RegisteredFactories =
      new std::list< ObjectFactoryBase * >;
    }
  std::cerr << "&m_RegisteredFactories = " << &m_RegisteredFactories
            << " m_RegisteredFactories = " << m_RegisteredFactories
            << " m_RegisteredFactories.size() = " <<
m_RegisteredFactories->size()
            << std::endl;
}

So it is printing out the address and size of the One True
m_RegisteredFactories every time
ObjectFactoryBase::InitializeFactoryList() gets called.

The output is below. Let me summarize: First, the ImageIO factories get
added. Then the TransformIO factories get added and the address changes,
and the count goes back to zero!

Now I'm perhaps alone in running with ITK_BUILD_SHARED, but it appears
that you get a different instance of
ObjectFactoryBase::m_RegisteredFactories depending on which shared library
you're in.  In other words the ObjectFactory implementation in ITK is 100%
broken with respect to shared libraries.


&m_RegisteredFactories = 0x101fb7c30 m_RegisteredFactories = 0x1061d6330
m_RegisteredFactories.size() =0
&m_RegisteredFactories = 0x101fb7c30 m_RegisteredFactories = 0x1061d6330
m_RegisteredFactories.size() =1
&m_RegisteredFactories = 0x101fb7c30 m_RegisteredFactories = 0x1061d6330
m_RegisteredFactories.size() =2
&m_RegisteredFactories = 0x101fb7c30 m_RegisteredFactories = 0x1061d6330
m_RegisteredFactories.size() =3
&m_RegisteredFactories = 0x101fb7c30 m_RegisteredFactories = 0x1061d6330
m_RegisteredFactories.size() =4
&m_RegisteredFactories = 0x101fb7c30 m_RegisteredFactories = 0x1061d6330
m_RegisteredFactories.size() =5
&m_RegisteredFactories = 0x101fb7c30 m_RegisteredFactories = 0x1061d6330
m_RegisteredFactories.size() =6
&m_RegisteredFactories = 0x101fb7c30 m_RegisteredFactories = 0x1061d6330
m_RegisteredFactories.size() =7
&m_RegisteredFactories = 0x101fb7c30 m_RegisteredFactories = 0x1061d6330
m_RegisteredFactories.size() =8
&m_RegisteredFactories = 0x101fb7c30 m_RegisteredFactories = 0x1061d6330
m_RegisteredFactories.size() =9
&m_RegisteredFactories = 0x101fb7c30 m_RegisteredFactories = 0x1061d6330
m_RegisteredFactories.size() =10
&m_RegisteredFactories = 0x101fb7c30 m_RegisteredFactories = 0x1061d6330
m_RegisteredFactories.size() =11
&m_RegisteredFactories = 0x101fb7c30 m_RegisteredFactories = 0x1061d6330
m_RegisteredFactories.size() =12
&m_RegisteredFactories = 0x101fb7c30 m_RegisteredFactories = 0x1061d6330
m_RegisteredFactories.size() =13
&m_RegisteredFactories = 0x104d7d5e0 m_RegisteredFactories = 0x1061e0a70
m_RegisteredFactories.size() =0




On 3/22/11 3:53 PM, "Kent WIlliams" <norman-k-williams at uiowa.edu> wrote:

>Yes I'd be available.
>
>
>Since at this point the TransformFactory only works by accident, any
>improvement would be welcome.
>
>On 3/22/11 3:35 PM, "Luis Ibanez" <luis.ibanez at kitware.com> wrote:
>
>>Hi Kent,
>>
>>Coincidentally we have a great tcon yesterday with Vince
>>looking at the status of factories in ITK.
>>
>>We identified a set of improvements that can be applied
>>to the Transform Factories.
>>
>>Could you be available for a phone or Skype tcon at
>>some time tomorrow Wednesday ?
>>
>>We can go over the details there.
>>
>>
>>    Please let me know,
>>
>>
>>        Thanks
>>
>>
>>            Luis
>>
>>
>>---------------
>>On Tue, Mar 22, 2011 at 3:53 PM, Williams, Norman K
>><norman-k-williams at uiowa.edu> wrote:
>>> I'm trying to add a new transform file reader/writer in
>>> ITK/Modules/Transform.
>>>
>>>
>>> Aside from the challenge of writing the class itself, I'm having
>>>trouble
>>> with the ObjectFactories.
>>>
>>> In ITK/Modules/Transform/itkTransformIOFactory.cxx, I register an
>>>instance
>>> of a new factory and all of a sudden the ObjectFactory can no longer
>>> create any of the registered transform classes.
>>>
>>> When I try to debug the problem I run into mysterious problems with the
>>> ObjectFactory not being able to create instances of any transform type,
>>> even though I can see them getting registered in
>>> ITK/Modules/Transform/src/itkTransformFactoryBase.cxx.
>>>
>>> What is the trick here? How does registering one additional factory
>>>screw
>>> up everything?
>>>
>>>
>>>
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