| Re: Problems with Restore [message #47989 is a reply to message #47868] |
Thu, 09 March 2006 01:05   |
Antonio Santiago
Messages: 201
Registered: February 2004
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Senior Member |
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Remember to OBJ_DESTROY the 'temp' reference into the Restore method.
Antonio Santiago wrote:
> Here is a partial response of your (our) problem, when you restoring the
> file, both 'self' and 'temp' references are the same, that is the 'self'
> reference changes.
>
>
> ------ Object code test --------
> FUNCTION OperatorLanguageMapping::Init
> RETURN, 1
> END
>
>
> PRO OperatorLanguageMapping::Restore, fileName
> print, 'Restoring'
> print, 'Before:'
> help, self ;; <----- Here is a reference
>
> restore, fileName, RESTORED_OBJECTS = temp
> print, 'After:'
> help, self, temp[0] ;; <----- Here 'self' reference has changed
> self.password = temp[0]->GetPassword()
> END
>
> PRO OperatorLanguageMapping::Save, fileName
> save, self, FILENAME=fileName
> END
>
>
> PRO OperatorLanguageMapping::SetPassword, pass
> self.password = pass
> END
>
>
> FUNCTION OperatorLanguageMapping::GetPassword
> RETURN, self.password
> END
>
>
> PRO OperatorLanguageMapping__define;
> objectClass = { OperatorLanguageMapping, $
> password : '' $ ; holds the password
> }
> END
> ------ Object code test --------
>
> ------ Test program --------
> PRO optest
> o1 = obj_new("OperatorLanguageMapping")
> o1->SetPassword, '123456'
> o1->Save, '~/o1.sav'
>
>
> o1->SetPassword, 'test'
>
> o1->Restore, '~/o1.sav'
>
> print, o1->GetPassword()
> END
> ------ Test program --------
>
>
> A possible solution maybe store the 'self' reference into a variable and
> after restoring the file reassign it:
>
> PRO OperatorLanguageMapping::Restore, fileName
> print, 'Restoring'
> print, 'Before:'
> help, self
>
> a=self ;; <--- Store 'self' reference'
> self=0 ;; <--- Changue it to a scaler, if not, a=self=temp.
> restore, fileName, RESTORED_OBJECTS = temp
> print, 'After:'
> help, self, temp[0]
>
> self=a ;; <---- Re-assing the initial reference.
> self.password = temp[0]->GetPassword()
> END
>
>
> Bye.
>
--
-----------------------------------------------------
Antonio Santiago P�rez
( email: santiago<<at>>grahi.upc.edu )
( www: http://www.grahi.upc.edu/santiago )
( www: http://asantiago.blogsite.org )
-----------------------------------------------------
GRAHI - Grup de Recerca Aplicada en Hidrometeorologia
Universitat Polit�cnica de Catalunya
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