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International Component for Unicode for Java (ICU4J) is a mature, widely used Java library providing Unicode and Globalization support

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/*
 ******************************************************************************
 * Copyright (C) 2003-2008, International Business Machines Corporation and   *
 * others. All Rights Reserved.                                               *
 ******************************************************************************
 *
 * Created on May 2, 2003
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package com.ibm.icu.impl;

import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;



/**
 * @author ram
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public final class StringPrepDataReader implements ICUBinary.Authenticate {
    private final static boolean debug = ICUDebug.enabled("NormalizerDataReader");
    
   /**
    * private constructor.
    * @param inputStream ICU uprop.dat file input stream
    * @exception IOException throw if data file fails authentication 
    */
    public StringPrepDataReader(InputStream inputStream) 
                                        throws IOException{
        if(debug) System.out.println("Bytes in inputStream " + inputStream.available());
        
        unicodeVersion = ICUBinary.readHeader(inputStream, DATA_FORMAT_ID, this);
        
        if(debug) System.out.println("Bytes left in inputStream " +inputStream.available());
        
        dataInputStream = new DataInputStream(inputStream);
        
        if(debug) System.out.println("Bytes left in dataInputStream " +dataInputStream.available());
    }
    
    public void read(byte[] idnaBytes,
                        char[] mappingTable) 
                        throws IOException{

        //Read the bytes that make up the idnaTrie  
        dataInputStream.readFully(idnaBytes);
        
        //Read the extra data
        for(int i=0;i