[fdo-trac] #468: Fix looping inheritance in gml212 schema.

[FDO]

#468: Fix looping inheritance in gml212 schema.
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   Reporter:  brentrobinson  |       Owner:  brentrobinson                             
       Type:  defect         |      Status:  new                                       
   Priority:  major          |   Milestone:                                            
  Component:  FDO API        |     Version:  3.4.0                                     
   Severity:  2              |    Keywords:  XML GML AbstractFeatureType stack overflow
External_id:                 |  
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 The following code lead to a stack overflow on the last line:


 {{{
     FdoFeatureSchemaCollection* schema =
 FdoFeatureSchemaCollection::Create(NULL);

     FdoPtr<FdoXmlFlags> flags = FdoXmlFlags::Create(
         L"fdo.osgeo.org/schemas/feature",
         FdoXmlFlags::ErrorLevel_VeryLow);

     FdoXmlReaderP gmlReader = FdoGml212Schema::CreateReader();
     schema->ReadXml(gmlReader, flags);

     schema->WriteXml(L"e:/transient/testschema.xml",
             FdoXmlFlagsP(FdoXmlFlags::Create(L"www.autodesk.com")));

     FdoFeatureSchemaCollection* schema2 =
 FdoFeatureSchemaCollection::Create(NULL);
     schema2->ReadXml(L"e:/transient/testschema.xml",
         FdoXmlFlagsP(FdoXmlFlags::Create(L"www.autodesk.com",
         FdoXmlFlags::ErrorLevel_Normal)));

 }}}

 The Gml212 schema describes the GML 2.1.2 base types (of which one of the
 types is AbstractFeatureType). When FDO writes schemas, it writes feature
 classes as being based on AbstractFeatureType. However, this means
 AbstractFeatureType ends up based on itself.

 The fix is to not extend AbstractFeatureType from itself when writing it
 to XML.

-- 
Ticket URL: <http://trac.osgeo.org/fdo/ticket/468>
FDO <http://fdo.osgeo.org/>
Feature Data Objects