OGRLayer* OGRVRTDataSource::InstanciateLayerInternal(CPLXMLNode *psLTree,
const char *pszVRTDirectory,
int bUpdate,
int nRecLevel)
{
/* -------------------------------------------------------------------- */
/* Create the layer object. */
/* -------------------------------------------------------------------- */
if( EQUAL(psLTree->pszValue,"OGRVRTLayer") )
{
OGRVRTLayer* poVRTLayer = new OGRVRTLayer(this);
if( !poVRTLayer->FastInitialize( psLTree, pszVRTDirectory, bUpdate ) )
{
delete poVRTLayer;
return NULL;
}
return poVRTLayer;
}
else if( EQUAL(psLTree->pszValue,"OGRVRTWarpedLayer") && nRecLevel < 30 )
{
return InstanciateWarpedLayer( psLTree, pszVRTDirectory,
bUpdate, nRecLevel + 1 );
}
else if( EQUAL(psLTree->pszValue,"OGRVRTUnionLayer") && nRecLevel < 30 )
{
return InstanciateUnionLayer( psLTree, pszVRTDirectory,
bUpdate, nRecLevel + 1 );
}
else
return NULL;
}
int OGRVRTDataSource::Initialize( CPLXMLNode *psTree, const char *pszNewName,
int bUpdate )
{
CPLAssert( nLayers == 0 );
this->psTree = psTree;
/* -------------------------------------------------------------------- */
/* Set name, and capture the directory path so we can use it */
/* for relative datasources. */
/* -------------------------------------------------------------------- */
char *pszVRTDirectory = CPLStrdup( CPLGetPath( pszNewName ) );
pszName = CPLStrdup( pszNewName );
/* -------------------------------------------------------------------- */
/* Look for layers. */
/* -------------------------------------------------------------------- */
CPLXMLNode *psLTree;
for( psLTree=psTree->psChild; psLTree != NULL; psLTree=psLTree->psNext )
{
if( psLTree->eType != CXT_Element
|| !EQUAL(psLTree->pszValue,"OGRVRTLayer") )
continue;
/* -------------------------------------------------------------------- */
/* Create the layer object. */
/* -------------------------------------------------------------------- */
OGRVRTLayer *poLayer;
poLayer = new OGRVRTLayer();
if( !poLayer->FastInitialize( psLTree, pszVRTDirectory, bUpdate ) )
{
CPLFree( pszVRTDirectory );
delete poLayer;
return FALSE;
}
/* -------------------------------------------------------------------- */
/* Add layer to data source layer list. */
/* -------------------------------------------------------------------- */
papoLayers = (OGRVRTLayer **)
CPLRealloc( papoLayers, sizeof(OGRVRTLayer *) * (nLayers+1) );
papoLayers[nLayers++] = poLayer;
}
CPLFree( pszVRTDirectory );
return TRUE;
}