public Cursor queryRecentDocuments()

in StorageProvider/Application/src/main/java/com/example/android/storageprovider/MyCloudProvider.java [154:203]
28 lines of code
5 McCabe index (conditional complexity)

    public Cursor queryRecentDocuments(String rootId, String[] projection)
            throws FileNotFoundException {
        Log.v(TAG, "queryRecentDocuments");

        // This example implementation walks a local file structure to find the most recently
        // modified files.  Other implementations might include making a network call to query a
        // server.

        // Create a cursor with the requested projection, or the default projection.
        final MatrixCursor result = new MatrixCursor(resolveDocumentProjection(projection));

        final File parent = getFileForDocId(rootId);

        // Create a queue to store the most recent documents, which orders by last modified.
        PriorityQueue<File> lastModifiedFiles = new PriorityQueue<File>(5, new Comparator<File>() {
            public int compare(File i, File j) {
                return Long.compare(i.lastModified(), j.lastModified());
            }
        });

        // Iterate through all files and directories in the file structure under the root.  If
        // the file is more recent than the least recently modified, add it to the queue,
        // limiting the number of results.
        final LinkedList<File> pending = new LinkedList<File>();

        // Start by adding the parent to the list of files to be processed
        pending.add(parent);

        // Do while we still have unexamined files
        while (!pending.isEmpty()) {
            // Take a file from the list of unprocessed files
            final File file = pending.removeFirst();
            if (file.isDirectory()) {
                // If it's a directory, add all its children to the unprocessed list
                Collections.addAll(pending, file.listFiles());
            } else {
                // If it's a file, add it to the ordered queue.
                lastModifiedFiles.add(file);
            }
        }

        // Add the most recent files to the cursor, not exceeding the max number of results.
        int includedCount = 0;
        while (includedCount < MAX_LAST_MODIFIED + 1 && !lastModifiedFiles.isEmpty()) {
            final File file = lastModifiedFiles.remove();
            includeFile(result, null, file);
            includedCount++;
        }
        return result;
    }