Trying picocli

pom.xml

@@ -27,6 +27,12 @@
 			<scope>test</scope>
 		</dependency>
 
+		<dependency>
+			<groupId>info.picocli</groupId>
+			<artifactId>picocli</artifactId>
+			<version>4.6.3</version>
+		</dependency>
+
 		<!-- https://mvnrepository.com/artifact/org.osgeo/proj4j -->
 		<dependency>
 			<groupId>org.osgeo</groupId>

src/main/java/eu/simstadt/regionchooser/RegionChooserCommandLineInterface.java

 package eu.simstadt.regionchooser;
 
-import java.io.IOException;
 import java.nio.file.Path;
-import java.nio.file.Paths;
-import java.util.logging.Logger;
-import java.util.stream.Stream;
+import java.util.List;
+import java.util.concurrent.Callable;
+import picocli.CommandLine;
+import picocli.CommandLine.Command;
+import picocli.CommandLine.Parameters;
 
 
-/*
- * Utility class to launch RegionChooser without GUI.
- */
-public class RegionChooserCommandLineInterface
+@Command(name = "region_chooser", mixinStandardHelpOptions = true, version = "regionChooser x.x", description = "Extracts a region from one or more citygmls.")
+class RegionChooserCommandLineInterface implements Callable<Integer>
 {
-	private static final Logger LOGGER = Logger.getLogger(RegionChooserCommandLineInterface.class.getName());
+	@Parameters(index = "0", description = "SRS Name : 'EPSG:31467' or just 31467")
+	String srsName;
 
-	public static void main(String[] args) throws IOException {
-		LOGGER.info(String.format("Launching RegionChooser %s", RegionChooserUtils.getApplicationVersion()));
-		if (args.length == 0) {
-			displayInfoAndQuit();
-		}
+	@Parameters(index = "1", description = "Output file : output.gml")
+	Path outputCityGML;
 
-		Path[] paths = Stream.of(args).map(Paths::get).toArray(Path[]::new);
-		for (Path path : paths) {
-			System.out.println(path);
-		}
-		//TODO: Also get output file
-		//TODO: Also get EPSG
-		//TODO: Also get WKT polygon
+	@Parameters(index = "2..*", arity = "1..*", description = "The citygml files to extract from : input1.gml input2.gml")
+	List<Path> citygmls;
 
-		//		StringBuilder sb = RegionExtractor.selectRegionDirectlyFromCityGML(wktPolygon, srsName, paths);
-		//
-		//		File buildingIdsFile = selectSaveFileWithDialog(project,
-		//				csvCitygmls.replace(";", "_").replace(".gml", ""), "selected_region");
-		//		RegionChooserUtils.writeStringBuilderToFile(sb, buildingIdsFile.toPath());
+	@Override
+	public Integer call() throws Exception { // your business logic goes here...
+		for (Path file : citygmls) {
+			System.out.println(file);
+		}
+		return 0;
 	}
 
-	private static void displayInfoAndQuit() {
-		LOGGER.info(
-				"Please add one directory path as argument. Either a repository path in order to list the available projects:\n"
-						+ "  java -d64 -classpath lib/*;workflows/* eu.simstadt.desktop.SimStadtCommandLineInterface ..\\TestRepository\n"
-						+ "Or a project path in order to list the available workflows:\n"
-						+ "  java -d64 -classpath lib/*;workflows/* eu.simstadt.desktop.SimStadtCommandLineInterface ..\\TestRepository\\Gruenbuehl.proj\n"
-						+ "Or a workflow path in order to launch the workflow:\n"
-						+ "  java -d64 -classpath lib/*;workflows/* eu.simstadt.desktop.SimStadtCommandLineInterface ..\\TestRepository\\Gruenbuehl.proj\\a.step");
-		System.exit(0);
+	// this example implements Callable, so parsing, error handling and handling user
+	// requests for usage help or version help can be done with one line of code.
+	public static void main(String... args) {
+		int exitCode = new CommandLine(new RegionChooserCommandLineInterface()).execute(args);
+		System.exit(exitCode);
 	}
-}
+}
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