Merge "Frameworks/base: Use holder in FileUtils" into nyc-dev

    public static final int S_IWOTH = 00002;

    public static final int S_IXOTH = 00001;

    /** Regular expression for safe filenames: no spaces or metacharacters */

    private static final Pattern SAFE_FILENAME_PATTERN = Pattern.compile("[\\w%+,./=_-]+");

    /** Regular expression for safe filenames: no spaces or metacharacters.

      *

      * Use a preload holder so that FileUtils can be compile-time initialized.

      */

    private static class NoImagePreloadHolder {

        public static final Pattern SAFE_FILENAME_PATTERN = Pattern.compile("[\\w%+,./=_-]+");

    }

    private static final File[] EMPTY = new File[0];

        // Note, we check whether it matches what's known to be safe,

        // rather than what's known to be unsafe.  Non-ASCII, control

        // characters, etc. are all unsafe by default.

        return SAFE_FILENAME_PATTERN.matcher(file.getPath()).matches();

        return NoImagePreloadHolder.SAFE_FILENAME_PATTERN.matcher(file.getPath()).matches();

    }

    /**