コード例 #1
0
 private static List<Class<?>> getClassesInDirectory(
     File directory, String packageName, ClassLoader classLoader)
     throws UnsupportedEncodingException {
   List<Class<?>> classes = new ArrayList<Class<?>>();
   // Capture all the .class files in this directory
   // Get the list of the files contained in the package
   String[] files = directory.list();
   for (String currentFile : files) {
     // we are only interested in .class files
     if (currentFile.endsWith(".class")) {
       // removes the .class extension
       // CHECKSTYLE:OFF
       try {
         classes.add(
             Class.forName(
                 packageName + '.' + currentFile.substring(0, currentFile.length() - 6)));
       } catch (Throwable e) {
         // do nothing. this class hasn't been found by the loader, and we don't care.
       }
       // CHECKSTYLE:ON
     } else {
       // It's another package
       String subPackageName = packageName + '.' + currentFile;
       // Ask for all resources for the path
       URL resource = classLoader.getResource(subPackageName.replace('.', '/'));
       File subDirectory = new File(URLDecoder.decode(resource.getPath(), "UTF-8"));
       List<Class<?>> classesForSubPackage =
           getClassesInDirectory(subDirectory, subPackageName, classLoader);
       classes.addAll(classesForSubPackage);
     }
   }
   return classes;
 }
コード例 #2
0
 /**
  * Retrieves recursively all the classes belonging to a package.
  *
  * @param packageName
  * @param classLoader the class loader used to load the class in the given package
  * @return the list of Class found
  * @throws ClassNotFoundException if any error occurs
  */
 public static List<Class<?>> getClassesInPackage(String packageName, ClassLoader classLoader)
     throws ClassNotFoundException {
   try {
     if (classLoader == null) {
       throw new ClassNotFoundException("Can't get class loader.");
     }
     String path = packageName.replace('.', '/');
     // Ask for all resources for the path
     Enumeration<URL> resources = classLoader.getResources(path);
     List<Class<?>> classes = new ArrayList<Class<?>>();
     while (resources.hasMoreElements()) {
       URL resource = resources.nextElement();
       File directory = new File(URLDecoder.decode(resource.getPath(), "UTF-8"));
       if (directory.canRead()) {
         classes.addAll(getClassesInDirectory(directory, packageName, classLoader));
       } else {
         // it's a jar file
         classes.addAll(
             getClassesInJarFile(
                 directory.getPath().substring(5, directory.getPath().indexOf(".jar") + 4),
                 packageName));
       }
     }
     return classes;
   } catch (NullPointerException x) {
     throw new ClassNotFoundException(
         packageName + " does not appear to be a valid package (Null pointer exception)", x);
   } catch (UnsupportedEncodingException encex) {
     throw new ClassNotFoundException(
         packageName + " does not appear to be a valid package (Unsupported encoding)", encex);
   } catch (IOException ioex) {
     throw new ClassNotFoundException(
         "IOException was thrown when trying to get all resources for " + packageName, ioex);
   }
 }