private static void scanDirectory(
File directory,
ClassLoader classloader,
String packagePrefix,
Set<File> ancestors,
Visitor visitor)
throws IOException {
File canonical = directory.getCanonicalFile();
if (ancestors.contains(canonical)) {
// A cycle in the filesystem, for example due to a symbolic link.
return;
}
File[] files = directory.listFiles();
if (files == null) {
// logger.warning("Cannot read directory " + directory);
// IO error, just skip the directory
return;
}
Set<File> newAncestors = new HashSet<>();
newAncestors.addAll(ancestors);
newAncestors.add(canonical);
for (File f : files) {
String name = f.getName();
if (f.isDirectory()) {
scanDirectory(f, classloader, packagePrefix + name + "/", newAncestors, visitor);
} else {
String resourceName = packagePrefix + name;
if (!resourceName.equals(JarFile.MANIFEST_NAME))
visitor.visit(resourceName, f.toURI().toURL(), classloader);
}
}
}
private static void scanFrom(
File file, ClassLoader classloader, Set<URI> scannedUris, Visitor visitor)
throws IOException {
if (!file.exists()) return;
if (file.isDirectory()) scanDirectory(file, classloader, visitor);
else scanJar(file, classloader, scannedUris, visitor);
}
private static void scanDirectory(File directory, ClassLoader classloader, Visitor visitor)
throws IOException {
scanDirectory(directory, classloader, "", new HashSet<File>(), visitor);
}