/**
 * Implementation is provided by the parent class. Cannot be overridden.
 *
 * @see #getDocumentType(String)
 */
@Override
public final String getType(Uri uri) {
    try {
        switch (mMatcher.match(uri)) {
            case MATCH_ROOT:
                return DocumentsContract.Root.MIME_TYPE_ITEM;
            case MATCH_DOCUMENT:
            case MATCH_DOCUMENT_TREE:
                enforceTree(uri);
                return getDocumentType(getDocumentId(uri));
            default:
                return null;
        }
    } catch (FileNotFoundException e) {
        Log.w(TAG, "Failed during getType", e);
        return null;
    }
}
 

@Override
public Cursor queryRoots(final String[] projection) throws FileNotFoundException {
    // Create a cursor with either the requested fields, or the default
    // projection if "projection" is null.
    final MatrixCursor result = new MatrixCursor(projection != null ? projection : DEFAULT_ROOT_PROJECTION);
    // Add Home directory
    File homeDir = Environment.getExternalStorageDirectory();
    final MatrixCursor.RowBuilder row = result.newRow();
    // These columns are required
    row.add(Root.COLUMN_ROOT_ID, homeDir.getAbsolutePath());
    row.add(Root.COLUMN_DOCUMENT_ID, homeDir.getAbsolutePath());
    row.add(Root.COLUMN_TITLE, getContext().getString(R.string.internal_storage));
    row.add(Root.COLUMN_FLAGS, Root.FLAG_LOCAL_ONLY | Root.FLAG_SUPPORTS_CREATE);
    row.add(Root.COLUMN_ICON, R.drawable.ic_shot_project);
    // These columns are optional
    row.add(Root.COLUMN_AVAILABLE_BYTES, homeDir.getFreeSpace());
    // Root.COLUMN_MIME_TYPE is another optional column and useful if you
    // have multiple roots with different
    // types of mime types (roots that don't match the requested mime type
    // are automatically hidden)
    return result;
}
 

@Override
public Cursor queryRoots(final String[] projection) throws FileNotFoundException {
    // Create a cursor with either the requested fields, or the default
    // projection if "projection" is null.
    final MatrixCursor result = new MatrixCursor(projection != null ? projection
            : DEFAULT_ROOT_PROJECTION);
    // Add Home directory
    File homeDir = Environment.getExternalStorageDirectory();
    final MatrixCursor.RowBuilder row = result.newRow();
    // These columns are required
    row.add(Root.COLUMN_ROOT_ID, homeDir.getAbsolutePath());
    row.add(Root.COLUMN_DOCUMENT_ID, homeDir.getAbsolutePath());
    row.add(Root.COLUMN_TITLE, "internal storage");
    row.add(Root.COLUMN_FLAGS, Root.FLAG_LOCAL_ONLY | Root.FLAG_SUPPORTS_CREATE);
    //row.add(Root.COLUMN_ICON, R.drawable.ic_provider);
    // These columns are optional
    row.add(Root.COLUMN_AVAILABLE_BYTES, homeDir.getFreeSpace());
    // Root.COLUMN_MIME_TYPE is another optional column and useful if you
    // have multiple roots with different
    // types of mime types (roots that don't match the requested mime type
    // are automatically hidden)
    return result;
}
 

@Override
public Cursor queryRoots(final String[] projection) throws FileNotFoundException {
    // Create a cursor with either the requested fields, or the default
    // projection if "projection" is null.
    final MatrixCursor result = new MatrixCursor(projection != null ? projection
            : DEFAULT_ROOT_PROJECTION);
    // Add Home directory
    File homeDir = Environment.getExternalStorageDirectory();
    final MatrixCursor.RowBuilder row = result.newRow();
    // These columns are required
    row.add(Root.COLUMN_ROOT_ID, homeDir.getAbsolutePath());
    row.add(Root.COLUMN_DOCUMENT_ID, homeDir.getAbsolutePath());
    row.add(Root.COLUMN_TITLE, getContext().getString(R.string.internal_storage));
    row.add(Root.COLUMN_FLAGS, Root.FLAG_LOCAL_ONLY | Root.FLAG_SUPPORTS_CREATE);
    row.add(Root.COLUMN_ICON, R.drawable.ic_provider);
    // These columns are optional
    row.add(Root.COLUMN_AVAILABLE_BYTES, homeDir.getFreeSpace());
    // Root.COLUMN_MIME_TYPE is another optional column and useful if you
    // have multiple roots with different
    // types of mime types (roots that don't match the requested mime type
    // are automatically hidden)
    return result;
}
 

@Override
public Cursor queryRoots(final String[] projection) throws FileNotFoundException {
    // Create a cursor with either the requested fields, or the default
    // projection if "projection" is null.
    final MatrixCursor result = new MatrixCursor(projection != null ? projection
            : DEFAULT_ROOT_PROJECTION);
    // Add Home directory
    File homeDir = Environment.getExternalStorageDirectory();
    final MatrixCursor.RowBuilder row = result.newRow();
    // These columns are required
    row.add(Root.COLUMN_ROOT_ID, homeDir.getAbsolutePath());
    row.add(Root.COLUMN_DOCUMENT_ID, homeDir.getAbsolutePath());
    row.add(Root.COLUMN_TITLE, getContext().getString(R.string.internal_storage));
    row.add(Root.COLUMN_FLAGS, Root.FLAG_LOCAL_ONLY | Root.FLAG_SUPPORTS_CREATE);
    row.add(Root.COLUMN_ICON, R.drawable.ic_provider);
    // These columns are optional
    row.add(Root.COLUMN_AVAILABLE_BYTES, homeDir.getFreeSpace());
    // Root.COLUMN_MIME_TYPE is another optional column and useful if you
    // have multiple roots with different
    // types of mime types (roots that don't match the requested mime type
    // are automatically hidden)
    return result;
}
 

@Override
public Cursor queryRoots(final String[] projection) throws FileNotFoundException {
	// Create a cursor with either the requested fields, or the default
	// projection if "projection" is null.
	final MatrixCursor result = new MatrixCursor(projection != null ? projection
			: DEFAULT_ROOT_PROJECTION);
	// Add Home directory
	File homeDir = Environment.getExternalStorageDirectory();
	final MatrixCursor.RowBuilder row = result.newRow();
	// These columns are required
	row.add(Root.COLUMN_ROOT_ID, homeDir.getAbsolutePath());
	row.add(Root.COLUMN_DOCUMENT_ID, homeDir.getAbsolutePath());
	row.add(Root.COLUMN_TITLE, getContext().getString(R.string.internal_storage));
	row.add(Root.COLUMN_FLAGS, Root.FLAG_LOCAL_ONLY | Root.FLAG_SUPPORTS_CREATE);
	row.add(Root.COLUMN_ICON, R.drawable.ic_provider);
	// These columns are optional
	row.add(Root.COLUMN_AVAILABLE_BYTES, homeDir.getFreeSpace());
	// Root.COLUMN_MIME_TYPE is another optional column and useful if you
	// have multiple roots with different
	// types of mime types (roots that don't match the requested mime type
	// are automatically hidden)
	return result;
}
 

@Override
public Cursor queryRoots(final String[] projection) throws FileNotFoundException {
    // Create a cursor with either the requested fields, or the default
    // projection if "projection" is null.
    final MatrixCursor result = new MatrixCursor(projection != null ? projection
            : DEFAULT_ROOT_PROJECTION);
    // Add Home directory
    File homeDir = Environment.getExternalStorageDirectory();
    final MatrixCursor.RowBuilder row = result.newRow();
    // These columns are required
    row.add(Root.COLUMN_ROOT_ID, homeDir.getAbsolutePath());
    row.add(Root.COLUMN_DOCUMENT_ID, homeDir.getAbsolutePath());
    row.add(Root.COLUMN_TITLE, getContext().getString(R.string.internal_storage));
    row.add(Root.COLUMN_FLAGS, Root.FLAG_LOCAL_ONLY | Root.FLAG_SUPPORTS_CREATE);
    row.add(Root.COLUMN_ICON, R.drawable.ic_provider);
    // These columns are optional
    row.add(Root.COLUMN_AVAILABLE_BYTES, homeDir.getFreeSpace());
    // Root.COLUMN_MIME_TYPE is another optional column and useful if you
    // have multiple roots with different
    // types of mime types (roots that don't match the requested mime type
    // are automatically hidden)
    return result;
}
 

@Override
public Cursor queryRoots(final String[] projection) throws FileNotFoundException {
    // Create a cursor with either the requested fields, or the default
    // projection if "projection" is null.
    final MatrixCursor result = new MatrixCursor(projection != null ? projection
            : DEFAULT_ROOT_PROJECTION);
    // Add Home directory
    File homeDir = Environment.getExternalStorageDirectory();
    final MatrixCursor.RowBuilder row = result.newRow();
    // These columns are required
    row.add(Root.COLUMN_ROOT_ID, homeDir.getAbsolutePath());
    row.add(Root.COLUMN_DOCUMENT_ID, homeDir.getAbsolutePath());
    row.add(Root.COLUMN_TITLE, getContext().getString(R.string.internal_storage));
    row.add(Root.COLUMN_FLAGS, Root.FLAG_LOCAL_ONLY | Root.FLAG_SUPPORTS_CREATE);
    row.add(Root.COLUMN_ICON, R.drawable.ic_provider);
    // These columns are optional
    row.add(Root.COLUMN_AVAILABLE_BYTES, homeDir.getFreeSpace());
    // Root.COLUMN_MIME_TYPE is another optional column and useful if you
    // have multiple roots with different
    // types of mime types (roots that don't match the requested mime type
    // are automatically hidden)
    return result;
}
 

@Override
public Cursor queryRoots(final String[] projection) throws FileNotFoundException {
    // Create a cursor with either the requested fields, or the default
    // projection if "projection" is null.
    final MatrixCursor result = new MatrixCursor(projection != null ? projection
            : DEFAULT_ROOT_PROJECTION);
    // Add Home directory
    File homeDir = Environment.getExternalStorageDirectory();
    final MatrixCursor.RowBuilder row = result.newRow();
    // These columns are required
    row.add(Root.COLUMN_ROOT_ID, homeDir.getParent());
    row.add(Root.COLUMN_DOCUMENT_ID, homeDir.getParent());
    row.add(Root.COLUMN_TITLE, getContext().getString(R.string.all_storage));
    row.add(Root.COLUMN_FLAGS, Root.FLAG_LOCAL_ONLY | Root.FLAG_SUPPORTS_CREATE);
    row.add(Root.COLUMN_ICON, R.drawable.ic_provider);
    // These columns are optional
    row.add(Root.COLUMN_AVAILABLE_BYTES, homeDir.getFreeSpace());
    // Root.COLUMN_MIME_TYPE is another optional column and useful if you
    // have multiple roots with different
    // types of mime types (ro`ots that don't match the requested mime type
    // are automatically hidden)
    return result;
}
 

@Override
public Cursor queryRoots(final String[] projection) throws FileNotFoundException {
  Log.d(LOG_TAG, "queryRoots() root dir = " + rootDir);
  String[] resolvedProjection = resolveProjection(projection, DEFAULT_ROOT_PROJECTION);
  MatrixCursor result = new MatrixCursor(resolvedProjection);
  MatrixCursor.RowBuilder row = result.newRow();
  row.add(Root.COLUMN_ROOT_ID, ROOT_ID);
  row.add(Root.COLUMN_FLAGS, Root.FLAG_SUPPORTS_CREATE /*| Root.FLAG_SUPPORTS_RECENTS*/ | Root.FLAG_SUPPORTS_SEARCH);
  row.add(Root.COLUMN_TITLE, getContext().getString(R.string.app_name));
  row.add(Root.COLUMN_DOCUMENT_ID, ROOT_ID);
  row.add(Root.COLUMN_AVAILABLE_BYTES, rootDir.getFreeSpace());
  row.add(Root.COLUMN_ICON, R.mipmap.jppf_icon);
  return result;
}
 

@Override
public Cursor queryRoots(String[] projection) throws FileNotFoundException {
  if(BuildConfig.DEBUG) Log.d(TAG, "Querying roots.");
  projection = (projection == null) ? DEFAULT_ROOT_PROJECTION : projection;

  MatrixCursor cursor = new MatrixCursor(projection);

  for (String uri : mShareManager) {
    if (!mShareManager.isShareMounted(uri)) {
      continue;
    }

    final String name;
    final Uri parsedUri = Uri.parse(uri);
    try(CacheResult result = mCache.get(parsedUri)) {
      final DocumentMetadata metadata;
      if (result.getState() == CacheResult.CACHE_MISS) {
        metadata = DocumentMetadata.createShare(parsedUri);
        mCache.put(metadata);
      } else {
        metadata = result.getItem();
      }

      name = metadata.getDisplayName();

      cursor.addRow(new Object[] {
          toRootId(metadata),
          toDocumentId(parsedUri),
          name,
          Root.FLAG_SUPPORTS_CREATE | Root.FLAG_SUPPORTS_IS_CHILD | Root.FLAG_SUPPORTS_EJECT,
          R.drawable.ic_folder_shared
      });
    }

  }
  return cursor;
}
 

@Override
public Cursor queryRoots(String[] projection) throws FileNotFoundException {
  // Use a MatrixCursor to build a cursor
  // with either the requested fields, or the default
  // projection if "projection" is null.
  final MatrixCursor result = new MatrixCursor(resolveRootProjection(projection));

  final MatrixCursor.RowBuilder row = result.newRow();
  row.add(Root.COLUMN_ROOT_ID, DEFAULT_ROOT_PROJECTION);

  // TODO: Implement Root.FLAG_SUPPORTS_RECENTS and Root.FLAG_SUPPORTS_SEARCH.
  // This will mean documents will show up in the "recents" category and be searchable.

  // COLUMN_TITLE is the root title (e.g. Gallery, Drive).
  row.add(Root.COLUMN_TITLE, getContext().getString(R.string.app_name));

  // This document id cannot change after it's shared.
  row.add(Root.COLUMN_DOCUMENT_ID, ROOT_DIRECTORY_ID);

  // The child MIME types are used to filter the roots and only present to the
  // user those roots that contain the desired type somewhere in their file hierarchy.
  row.add(Root.COLUMN_MIME_TYPES, "image/*");

  row.add(Root.COLUMN_ICON, R.mipmap.ic_launcher);

  return result;
}
 

@Override
public Cursor queryRoots(String[] projection) throws FileNotFoundException {
    Log.v(TAG, "queryRoots");

    // Create a cursor with either the requested fields, or the default projection.  This
    // cursor is returned to the Android system picker UI and used to display all roots from
    // this provider.
    final MatrixCursor result = new MatrixCursor(resolveRootProjection(projection));

    // If user is not logged in, return an empty root cursor.  This removes our provider from
    // the list entirely.
    if (!isUserLoggedIn()) {
        return result;
    }

    // It's possible to have multiple roots (e.g. for multiple accounts in the same app) -
    // just add multiple cursor rows.
    // Construct one row for a root called "MyCloud".
    final MatrixCursor.RowBuilder row = result.newRow();

    row.add(Root.COLUMN_ROOT_ID, ROOT);
    row.add(Root.COLUMN_SUMMARY, getContext().getString(R.string.root_summary));

    // FLAG_SUPPORTS_CREATE means at least one directory under the root supports creating
    // documents.  FLAG_SUPPORTS_RECENTS means your application's most recently used
    // documents will show up in the "Recents" category.  FLAG_SUPPORTS_SEARCH allows users
    // to search all documents the application shares.
    row.add(Root.COLUMN_FLAGS, Root.FLAG_SUPPORTS_CREATE |
            Root.FLAG_SUPPORTS_RECENTS |
            Root.FLAG_SUPPORTS_SEARCH);

    // COLUMN_TITLE is the root title (e.g. what will be displayed to identify your provider).
    row.add(Root.COLUMN_TITLE, getContext().getString(R.string.app_name));

    // This document id must be unique within this provider and consistent across time.  The
    // system picker UI may save it and refer to it later.
    row.add(Root.COLUMN_DOCUMENT_ID, getDocIdForFile(mBaseDir));

    // The child MIME types are used to filter the roots and only present to the user roots
    // that contain the desired type somewhere in their file hierarchy.
    row.add(Root.COLUMN_MIME_TYPES, getChildMimeTypes(mBaseDir));
    row.add(Root.COLUMN_AVAILABLE_BYTES, mBaseDir.getFreeSpace());
    row.add(Root.COLUMN_ICON, R.drawable.ic_launcher);

    return result;
}
 

@Override
public Cursor queryRoots(String[] projection) throws FileNotFoundException {
    Log.v(TAG, "queryRoots");

    // Create a cursor with either the requested fields, or the default projection.  This
    // cursor is returned to the Android system picker UI and used to display all roots from
    // this provider.
    final MatrixCursor result = new MatrixCursor(resolveRootProjection(projection));

    // If user is not logged in, return an empty root cursor.  This removes our provider from
    // the list entirely.
    if (!isUserLoggedIn()) {
        return result;
    }

    // It's possible to have multiple roots (e.g. for multiple accounts in the same app) -
    // just add multiple cursor rows.
    // Construct one row for a root called "MyCloud".
    final MatrixCursor.RowBuilder row = result.newRow();

    row.add(Root.COLUMN_ROOT_ID, ROOT);
    row.add(Root.COLUMN_SUMMARY, getContext().getString(R.string.root_summary));

    // FLAG_SUPPORTS_CREATE means at least one directory under the root supports creating
    // documents.  FLAG_SUPPORTS_RECENTS means your application's most recently used
    // documents will show up in the "Recents" category.  FLAG_SUPPORTS_SEARCH allows users
    // to search all documents the application shares.
    row.add(Root.COLUMN_FLAGS, Root.FLAG_SUPPORTS_CREATE |
            Root.FLAG_SUPPORTS_RECENTS |
            Root.FLAG_SUPPORTS_SEARCH);

    // COLUMN_TITLE is the root title (e.g. what will be displayed to identify your provider).
    row.add(Root.COLUMN_TITLE, getContext().getString(R.string.app_name));

    // This document id must be unique within this provider and consistent across time.  The
    // system picker UI may save it and refer to it later.
    row.add(Root.COLUMN_DOCUMENT_ID, getDocIdForFile(mBaseDir));

    // The child MIME types are used to filter the roots and only present to the user roots
    // that contain the desired type somewhere in their file hierarchy.
    row.add(Root.COLUMN_MIME_TYPES, getChildMimeTypes(mBaseDir));
    row.add(Root.COLUMN_AVAILABLE_BYTES, mBaseDir.getFreeSpace());
    row.add(Root.COLUMN_ICON, R.drawable.ic_launcher);

    return result;
}