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public class TextFileReader implements  InputChannel
{
    private String  itsFileName;
    private BufferedReader itsFileReader;
    
    public  TextFileReader()
    {
    }
    
    public  void    openForWriting( String fname )
    {
        itsFileName = fname;
        
        try
        {
            itsFileReader = new BufferedReader(new FileReader(fname));
        } catch (IOException ex)
        {
            Logger.getLogger(TextFileWriter.class.getName()).log(Level.SEVERE, null, ex);
        }
    }    
    @Override
    public  String    read()
    {
        StringBuilder sb = new StringBuilder();
        String line;
        try
        {
            while( (line = itsFileReader.readLine()) != null )
                sb.append(line );
        } catch (IOException ex)
        {
            Logger.getLogger(TextFileReader.class.getName()).log(Level.SEVERE, null, ex);
        }
        finally
        {
            close();
        }
        return sb.toString();
    }   
    
    @Override
    public  void    close()
    {
        try
        {
            itsFileReader.close();
        } catch (IOException ex)
        {
            Logger.getLogger(TextFileReader.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
    
}