[fdo-trac] #506: Fail to execute IsNull for NULL geometry property

[FDO]

#506: Fail to execute IsNull for NULL geometry property
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   Reporter:  christinebao  |       Owner:  christinebao
       Type:  defect        |      Status:  new         
   Priority:  major         |   Milestone:  3.5.0       
  Component:  SHP Provider  |     Version:  3.4.0       
   Severity:  3             |    Keywords:              
External_id:  1210720.01    |  
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 This defect is reported from Map 3D.

 Steps:
 1. Connect to the attached SHP file.
 2. Make a calculated field of Area2D(Geometry) named Calculation1.
 3. Open DataTable and sort the Calculation1 column, the data disappear.

 Cause:
 This SHP file is special, that it contains records which are all full,
 even for Geometry property. As the attached screen shot shows. Thus when
 re-order the calculated field and query from datasource, the following
 code fails (ShpReader.h line 629):
             else if (0 == wcscmp (propertyName,
 mLogicalGeometryPropertyName))
                 ret = (eNullShape == mShape->GetShapeType ());
 because mShape is NULL.
 Then the select command fails, and cause nothing show on DataTable.

 Fix:
 The above code should check mShape first. If mShape is NULL then the
 return value (means IsNULL) should be set true.

-- 
Ticket URL: <http://trac.osgeo.org/fdo/ticket/506>
FDO <http://fdo.osgeo.org/>
Feature Data Objects