*/
public StringPrep(InputStream inputStream) throws IOException{
BufferedInputStream b = new BufferedInputStream(inputStream,DATA_BUFFER_SIZE);
StringPrepDataReader reader = new StringPrepDataReader(b);
// read the indexes
indexes = reader.readIndexes(INDEX_TOP);
byte[] sprepBytes = new byte[indexes[INDEX_TRIE_SIZE]];
//indexes[INDEX_MAPPING_DATA_SIZE] store the size of mappingData in bytes
mappingData = new char[indexes[INDEX_MAPPING_DATA_SIZE]/2];
// load the rest of the data data and initialize the data members
reader.read(sprepBytes,mappingData);
sprepTrie = new CharTrie(new ByteArrayInputStream(sprepBytes), null);
// get the data format version
/*formatVersion = */reader.getDataFormatVersion();
// get the options
doNFKC = ((indexes[OPTIONS] & NORMALIZATION_ON) > 0);
checkBiDi = ((indexes[OPTIONS] & CHECK_BIDI_ON) > 0);
sprepUniVer = getVersionInfo(reader.getUnicodeVersion());
normCorrVer = getVersionInfo(indexes[NORM_CORRECTNS_LAST_UNI_VERSION]);
VersionInfo normUniVer = Normalizer.getUnicodeVersion();
if(normUniVer.compareTo(sprepUniVer) < 0 && /* the Unicode version of SPREP file must be less than the Unicode Vesion of the normalization data */
normUniVer.compareTo(normCorrVer) < 0 && /* the Unicode version of the NormalizationCorrections.txt file should be less than the Unicode Vesion of the normalization data */
((indexes[OPTIONS] & NORMALIZATION_ON) > 0) /* normalization turned on*/