fix #327 and add support for glob syntax in classpath input

src/main/java/de/dhbwstuttgart/environment/DirectoryClassLoader.java

@@ -5,31 +5,61 @@ import java.io.IOException;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLClassLoader;
-import java.nio.file.Files;
+import java.nio.file.*;
-import java.nio.file.Path;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.stream.Collectors;
 
 public class DirectoryClassLoader extends URLClassLoader implements IByteArrayClassLoader {
-    public DirectoryClassLoader(File directory, java.lang.ClassLoader parent) {
+//    public DirectoryClassLoader(File directory, java.lang.ClassLoader parent) {
-        super(generateURLArray(dirToURL(directory)), parent);
+//        super(generateURLArray(dirToURL(directory)), parent);
-    }
+//    }
 
     public DirectoryClassLoader(List<File> directory, java.lang.ClassLoader parent) {
-        super(directory.stream().map(DirectoryClassLoader::dirToURL).collect(Collectors.toList()).toArray(new URL[0]), parent);
+        super(directory.stream().map(DirectoryClassLoader::dirToURL).flatMap(List::stream).collect(Collectors.toList()).toArray(new URL[0]), parent.getParent());
     }
 
     private static URL[] generateURLArray(URL url) {
         return new URL[]{url};
     }
 
-    private static URL dirToURL(File url){
+    private static List<URL> dirToURL(File file) {
         //if(!url.isDirectory())throw new RuntimeException(url.toString() + " is not a directory");
+
+        Path dir;
+        if (file.isDirectory()) {
             try {
-            return url.toURI().toURL();
+                return List.of(file.toURI().toURL()); // if file is a directory, use it as is
+            } catch (MalformedURLException e) {
+                e.printStackTrace();
+                return List.of();
+            }
+        }
+
+        dir = file.toPath().getParent(); // if file is not a directory, get its parent directory
+        String pattern = file.toPath().getFileName().toString(); // use the file name as a glob pattern
+
+        List<URL> urls = new ArrayList<>();
+
+        try {
+            urls = Files.walk(dir)
+                    .filter(Files::isRegularFile) // only consider files (not directories)
+                    .filter(path -> {
+                        PathMatcher matcher = FileSystems.getDefault().getPathMatcher("glob:" + pattern);
+                        return matcher.matches(path.getFileName()); // match the file name against the pattern
+                    })
+                    .map(path -> {
+                        try {
+                            return path.toUri().toURL();
                         } catch (MalformedURLException e) {
                             throw new RuntimeException(e);
                         }
+                    }) // convert the path to a URL
+                    .toList(); // print the path of each matching file
+        } catch (IOException | RuntimeException e) {
+            e.printStackTrace();
+        }
+        return urls;
     }
 
     @Override