private boolean isVmdkFile(InputStream inputStream) throws IOException {
  return VMDK_FILE_SIGNATURE.equalsIgnoreCase(DataField.getString(VMDK_SIGNATURE_FIELD,inputStream));
}

private boolean isVmdkFile ( InputStream inputStream ) throws IOException { return VMDK_FILE_SIGNATURE . equalsIgnoreCase ( DataField . getString ( VMDK_SIGNATURE_FIELD , inputStream ) ) ; }
peak into the stream for the vmdk signature .
