private FileVisitResult walk(Path file, CallContext context, int depth) throws IOException {
DcFile target = null;
try {
target = provider.getFile(file, context);
} catch (AccessDeniedException ex) {
// Fail if this was the first directory, otherwise skip.
if (depth == 0) {
throw ex;
}
return FileVisitResult.CONTINUE;
} catch (IOException ex) {
return visitor.visitFileFailed(file, ex);
}
// at maximum depth
if (depth >= maxDepth) {
return FileVisitResult.CONTINUE;
}
// the exception notified to the postVisitDirectory method
IOException ioe = null;
FileVisitResult result;
// invoke preVisitDirectory and then visit each entry
result = visitor.preVisitDirectory(file, target);
if (result != FileVisitResult.CONTINUE) {
return result;
}
try {
for (Path dir : target.getAttributeView(SubdirectoryView.class).getChildrenPaths()) {
result = walk(dir, context, depth + 1);
// returning null will cause NPE to be thrown
if (result == null || result == FileVisitResult.TERMINATE) {
return result;
}
// skip remaining siblings in this directory
if (result == FileVisitResult.SKIP_SIBLINGS) {
break;
}
}
} catch (DirectoryIteratorException e) {
// IOException will be notified to postVisitDirectory
ioe = e.getCause();
}
// invoke postVisitDirectory last
return visitor.postVisitDirectory(file, ioe);
}
@Override
public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs)
throws IOException {
DcFile file = (DcFile) attrs;
// Groups can only contain other groups. If we are searching groups, accept the group,
// otherwise, continue
if (file.getType() instanceof GroupType) {
if (filter.searchGroups() && filter.matcher.matches(dir)) {
accept(file);
}
return FileVisitResult.SKIP_SUBTREE;
}
folderStack.add(file);
return FileVisitResult.CONTINUE;
}
public void accept(DcFile file) {
files.add(file.getObject());
}
