Merge "Remove unused methods from OMS" am: fd5cdfc9 am: 55a2494d

        return new File(getIdmapPath(overlayPackage.applicationInfo.getBaseCodePath())).isFile();

    }

    boolean isDangerous(@NonNull final PackageInfo overlayPackage, final int userId) {

        // unused userId: see comment in OverlayManagerServiceImpl.removeIdmapIfPossible

        return isDangerous(getIdmapPath(overlayPackage.applicationInfo.getBaseCodePath()));

    }

    private String getIdmapPath(@NonNull final String baseCodePath) {

        final StringBuilder sb = new StringBuilder("/data/resource-cache/");

        sb.append(baseCodePath.substring(1).replace('/', '@'));

        sb.append("@idmap");

        return sb.toString();

    }

    private boolean isDangerous(@NonNull final String idmapPath) {

        try (DataInputStream dis = new DataInputStream(new FileInputStream(idmapPath))) {

            final int magic = dis.readInt();

            final int version = dis.readInt();

            final int dangerous = dis.readInt();

            return dangerous != 0;

        } catch (IOException e) {

            return true;

        }

    }

}