import java.sql.*;
import java.io.*;
import java.util.*;
import java.awt.*;
import java.net.*;

class RetrieveObject {
    public static void main(String[] args) {
	Driver drv = null;
	Connection cnn = null;
	ResultSet rst = null;
	Statement stm = null;

	try{
	    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
	    cnn = DriverManager.getConnection("jdbc:odbc:objectStoreTest");
	}
	catch(Exception e){
	    System.out.println("Exception=" + e.getMessage());
	}

	try{
	    String s1 = "SELECT objKey, objData from objTable";
	    stm = cnn.createStatement();
	    rst = stm.executeQuery(s1);

	    if(rst.next()){
		Object obj = new ByteArrayInputStream(rst.getBytes(2));
		ObjectInputStream objectinputstream = new ObjectInputStream(((InputStream)(obj)));
		HashSet h = (HashSet)objectinputstream.readObject();
		int x = h.size();
		System.out.println(x);
	    }
	}
	catch(Exception e){
	    String c;
	    c = e.toString();
	    System.out.println(c);
	}
    }
}