import  java.io.File;
 import  java.io.FileInputStream;
 import  java.io.FileNotFoundException;
 import  java.io.FileOutputStream;
 import  java.io.IOException;
 import  java.io.InputStream;
 import  java.io.OutputStream;
 import  java.io.UnsupportedEncodingException;
 import  java.nio.channels.FileLock;
 import  java.util.Arrays;
 import  java.util.Date;

 import  org.apache.commons.io.CopyUtils;
 import  org.apache.commons.io.IOUtils;
 import  org.apache.log4j.Logger;

 public   class  TransitData  implements  Cloneable {

    
	/**
	 * <p>TransitData использует для хранения данных временные файлы.
	 * Данный атрибут хранит ссылку на такой файл, который используется только
	 * внутри класса. 
	 */
	 private  File intFile;  private  FileLock fileLock;
	
	/**
	 * <p>(Factory Method) Фабрика для создания <b>TransitData</b> по </p>
	 */
	 public   static  TransitData createFrom???(???) {
                         transitData =  new  TransitData();

		File tmpFile = File.createTempFile("data", ".xml"); FileLock fileLock;
		// здесь записываем данные в файл

		transitData.intFile = tmpFile;
		transitData.fileLock = fileLock; 

		 return  transitData;
	}

	/** 
	 * @see java.lang.Object#clone()
	 */
	 public  Object clone()  throws  CloneNotSupportedException {
		TransitData clone = (TransitData)  super .clone();
		
         try  {
            clone.fileLock =  new  FileInputStream( this .intFile).getChannel().lock(0L, Long .MAX_VALUE,true);
        }  catch  (Exception e) {
             throw   new  RuntimeException("не удалось скопировать объект", e);
        }
		
		 return  clone;
	}

	 public  InputStream getDataStream() {
	     if  (isDisposed)
	         throw   new  IllegalStateException("data not available cas object is disposed");
	     try  {
             return   new  FileInputStream(intFile);
        }  catch  (FileNotFoundException e) {
            RuntimeException re =  new  IllegalStateException("internal file not found");
            re.initCause(e);
             throw  re;
        }
	 private   boolean  isDisposed = false;
    /**
     * @throws Exception
     */
     public   void  dispose()  throws  Exception {
         if  (isDisposed)
             throw   new  IllegalStateException("object's already disposed");

        if (intFile != null)
            try {
                fileLock.channel().close(); //release();
                intFile.delete();
                Logger.getLogger(TransitData.class).debug("disposed, file "+intFile.getName()+" deleted");
            } catch (Exception e) {
                Logger.getLogger(TransitData.class).debug(e);
            }

        intFile = null;
        isDisposed = true;
    }

    protected void finalize() throws Throwable {
        super.finalize();

        if (!isDisposed)
        {
            Logger.getLogger(TransitData.class).debug("object isn't disposed");
            dispose();
        }
        
    }
	
}