[fdo-trac] #356: .NET: IFeatureReader throws errors when passed by value

[FDO]

#356: .NET: IFeatureReader throws errors when passed by value
-----------------------+----------------------------------------------------
   Reporter:  MaksimS  |       Owner:  gregboone
       Type:  defect   |      Status:  new      
   Priority:  major    |   Milestone:           
  Component:  FDO API  |     Version:  3.3.1    
   Severity:  3        |    Keywords:           
External_id:           |  
-----------------------+----------------------------------------------------
 .NET 2.0: When passed by value, instantiated
 OSGeo.FDO.Commands.Feature.IFeatureReader causes "memory read error"
 exceptions thrown on random basis. It's possibly something up to generated
 managed SWIG interfaces and ways the unmanaged objects / related memory
 gets handled.

 Example:

 There's MyFeature class that takes instantiated IFeatureReader in it's
 constructor to populate it's members and instantiate MyFeature object:

 {{{
 Public Class MyFeature

 Sub New(ByVal reader As OSGeo.FDO.Commands.Feature.IFeatureReader)
 ...
 ...
 End Sub

 ...
 }}}

 While being utilized like:

 {{{
 ...
 Dim reader As IFeatureReader = selectCmd.Execute

 Do While reader.ReadNext
    Dim myFeatureInstance As New MyFeature(reader)
    ...
 Loop

 reader.Close()
 reader.Dispose()
 ...
 }}}

 Excatly the same exceptions (again, on random basis) get thrown if
 instantiated IFeatureReader was passed by reference. Can someone please
 point out "dos and dont's" of managed FDO API interfaces?

-- 
Ticket URL: <http://trac.osgeo.org/fdo/ticket/356>
FDO <http://fdo.osgeo.org/>
Feature Data Objects