Feat: Add entrypoints for parsing CityModel from Stream

CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/parser/CityGmlParser.java

@@ -196,6 +196,41 @@ public class CityGmlParser {
 		}
 	}
 
+	public static CityDoctorModel parseCityGmlStream(InputStream is, ParserConfiguration config)
+			throws CityGmlParseException, InvalidGmlFileException {
+		return parseCityGmlStream(is, config, null, null);
+	}
+
+	public static CityDoctorModel parseCityGmlStream(InputStream is, ParserConfiguration config, ProgressListener l)
+			throws CityGmlParseException, InvalidGmlFileException {
+		return parseCityGmlStream(is, config, l, null);
+	}
+
+	public static CityDoctorModel parseCityGmlStream(InputStream is, ParserConfiguration config, ProgressListener l,
+			 GMLValidationHandler handler) throws CityGmlParseException, InvalidGmlFileException {
+		CityGMLContext context = getContext();
+
+		if (config.getValidate()) {
+			//TODO: Think of something to validate Inputstream
+			throw new InvalidGmlFileException("Invalid GML File.");
+		}
+
+		try {
+			parseEpsgCodeFromStream(is, config);
+			CityGMLInputFactory in = context.createCityGMLInputFactory()
+					.withChunking(ChunkOptions.chunkByProperties(chunkProperties).skipCityModel(false));
+			try(ObservedInputStream ois = new ObservedInputStream(is, is.available())){
+				if (l != null){
+					ois.addListener(l::updateProgress);
+				}
+				return readAndKeepFeatures(config, Path.of(""), in, ois);
+			}
+		} catch (CityGMLReadException | IOException | ParserConfigurationException | SAXException e) {
+			logger.error(e);
+			throw new CityGmlParseException("Failed to read CityGML file", e);
+		}
+	}
+
 	public static void streamCityGml(String file, ParserConfiguration config, CityGmlConsumer cityObjectConsumer,
 			String outputFile) throws CityGmlParseException {
 		Path f = Paths.get(file);