#266 #295 Clearing TDB folder instead of deleting it for ensuring win…

…dows compatibility

sparql-anything-model/src/main/java/io/github/sparqlanything/model/BaseFacadeXGraphBuilder.java

@@ -25,6 +25,7 @@
 import org.apache.jena.rdf.model.ModelFactory;
 import org.apache.jena.sparql.core.DatasetGraph;
 import org.apache.jena.sparql.core.DatasetGraphFactory;
+import org.apache.jena.tdb.TDBFactory;
 import org.apache.jena.tdb2.DatabaseMgr;
 import org.apache.jena.tdb2.TDB2Factory;
 import org.slf4j.Logger;
@@ -59,7 +60,12 @@ private void initialiseDatasetGraph(Properties properties) {
 				try {
 					FileUtils.deleteDirectory(ondiskFile);
 				} catch (IOException e) {
-					throw new RuntimeException(e);
+					if (TDBFactory.inUseLocation(ondiskPath)) {
+						TDB2Factory.connectDataset(ondiskPath).asDatasetGraph().clear();
+						log.warn("Clearing TBD instead of deleting the TDB folder.");
+					} else {
+						throw new RuntimeException(e);
+					}
 				}
 			}
 			datasetGraph = TDB2Factory.connectDataset(ondiskPath).asDatasetGraph();