QString Entity::SerializeToXMLString() const
{
QDomDocument scene_doc("Scene");
QDomElement scene_elem = scene_doc.createElement("scene");
SerializeToXML(scene_doc, scene_elem);
return scene_doc.toString();
}
void VRTDataset::FlushCache()
{
GDALDataset::FlushCache();
if( !bNeedsFlush || bWritable == FALSE)
return;
bNeedsFlush = FALSE;
// We don't write to disk if there is no filename. This is a
// memory only dataset.
if( strlen(GetDescription()) == 0
|| EQUALN(GetDescription(),"<VRTDataset",11) )
return;
/* -------------------------------------------------------------------- */
/* Create the output file. */
/* -------------------------------------------------------------------- */
VSILFILE *fpVRT;
fpVRT = VSIFOpenL( GetDescription(), "w" );
if( fpVRT == NULL )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Failed to write .vrt file in FlushCache()." );
return;
}
/* -------------------------------------------------------------------- */
/* Convert tree to a single block of XML text. */
/* -------------------------------------------------------------------- */
char *pszVRTPath = CPLStrdup(CPLGetPath(GetDescription()));
CPLXMLNode *psDSTree = SerializeToXML( pszVRTPath );
char *pszXML;
pszXML = CPLSerializeXMLTree( psDSTree );
CPLDestroyXMLNode( psDSTree );
CPLFree( pszVRTPath );
/* -------------------------------------------------------------------- */
/* Write to disk. */
/* -------------------------------------------------------------------- */
VSIFWriteL( pszXML, 1, strlen(pszXML), fpVRT );
VSIFCloseL( fpVRT );
CPLFree( pszXML );
}
CPLErr GDALPamDataset::TrySaveXML()
{
CPLXMLNode *psTree;
CPLErr eErr = CE_None;
nPamFlags &= ~GPF_DIRTY;
if( psPam == NULL || (nPamFlags & GPF_NOSAVE) )
return CE_None;
/* -------------------------------------------------------------------- */
/* Make sure we know the filename we want to store in. */
/* -------------------------------------------------------------------- */
if( !BuildPamFilename() )
return CE_None;
/* -------------------------------------------------------------------- */
/* Build the XML representation of the auxilary metadata. */
/* -------------------------------------------------------------------- */
CPLString osVRTPath = CPLGetPath(psPam->pszPamFilename);
psTree = SerializeToXML( osVRTPath );
if( psTree == NULL )
return CE_None;
/* -------------------------------------------------------------------- */
/* If we are working with a subdataset, we need to integrate */
/* the subdataset tree within the whole existing pam tree, */
/* after removing any old version of the same subdataset. */
/* -------------------------------------------------------------------- */
if( psPam->osSubdatasetName.size() != 0 )
{
CPLXMLNode *psOldTree, *psSubTree;
CPLErrorReset();
CPLPushErrorHandler( CPLQuietErrorHandler );
psOldTree = CPLParseXMLFile( psPam->pszPamFilename );
CPLPopErrorHandler();
if( psOldTree == NULL )
psOldTree = CPLCreateXMLNode( NULL, CXT_Element, "PAMDataset" );
for( psSubTree = psTree->psChild;
psSubTree != NULL;
psSubTree = psSubTree->psNext )
{
if( psSubTree->eType != CXT_Element
|| !EQUAL(psSubTree->pszValue,"Subdataset") )
continue;
if( !EQUAL(CPLGetXMLValue( psSubTree, "name", "" ),
psPam->osSubdatasetName) )
continue;
break;
}
if( psSubTree == NULL )
{
psSubTree = CPLCreateXMLNode( psOldTree, CXT_Element,
"Subdataset" );
CPLCreateXMLNode(
CPLCreateXMLNode( psSubTree, CXT_Attribute, "name" ),
CXT_Text, psPam->osSubdatasetName );
}
CPLXMLNode *psOldPamDataset = CPLGetXMLNode( psSubTree, "PAMDataset");
if( psOldPamDataset != NULL )
{
CPLRemoveXMLChild( psSubTree, psOldPamDataset );
CPLDestroyXMLNode( psOldPamDataset );
}
CPLAddXMLChild( psSubTree, psTree );
psTree = psOldTree;
}
/* -------------------------------------------------------------------- */
/* Try saving the auxilary metadata. */
/* -------------------------------------------------------------------- */
const char *pszNewPam;
int bSaved;
CPLPushErrorHandler( CPLQuietErrorHandler );
bSaved = CPLSerializeXMLTreeToFile( psTree, psPam->pszPamFilename );
CPLPopErrorHandler();
/* -------------------------------------------------------------------- */
/* If it fails, check if we have a proxy directory for auxilary */
/* metadata to be stored in, and try to save there. */
/* -------------------------------------------------------------------- */
if( bSaved )
eErr = CE_None;
else if( PamGetProxy(GetDescription()) == NULL
&& ((pszNewPam = PamAllocateProxy(GetDescription())) != NULL))
{
CPLErrorReset();
CPLFree( psPam->pszPamFilename );
psPam->pszPamFilename = CPLStrdup(pszNewPam);
eErr = TrySaveXML();
}
else
{
CPLError( CE_Warning, CPLE_AppDefined,
"Unable to save auxilary information in %s.",
psPam->pszPamFilename );
eErr = CE_Warning;
}
/* -------------------------------------------------------------------- */
/* Cleanup */
/* -------------------------------------------------------------------- */
CPLDestroyXMLNode( psTree );
return eErr;
}
