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[aspectj-dev] NoAspectBoundException while initilizing...
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hi,
i am using eclipse 3.5 and AJDT...
i am trying to execute my classechange_aspect class..the aspect method is
nothing calling...
and its giving an exception
org.aspectj.lang.NoAspectBoundException: Exception while initializing
classexchange_aspect: java.lang.NullPointerException
and my aspect code is:
import TGS.ClassExchange;
public aspect classexchange_aspect {
double discount=0.5;
String no_person=null;
Float persons=Float.parseFloat(no_person);
public pointcut compute():call (ClassExchange.new(float));
ClassExchange around():compute()
{
return getObject(proceed());
}
ClassExchange getObject(ClassExchange c)
{
if(c.check()==0)
return c;
else
{
System.out.println("parameter 1 ="+persons + "\nparameter 2
="+discount);
return new ClassExchange(persons,(float) discount);}
}
}
my java code is...
package TGS;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class ClassExchange extends HttpServlet {
private static final long serialVersionUID = 1L;
public float x,y,z,n;
public int ch,ad,tot_per;
double cost=5000.00;
public int flag=0;
public ClassExchange() {
super();
}
public ClassExchange(float a) {
x=a;
y=1;
}
public ClassExchange(Float a, float b) {
x=a;
y=b;
}
public float discount() {
return (float)5000.00*x*y;
}
/**
* @see HttpServlet#doGet(HttpServletRequest request,
HttpServletResponse response)
*/
public int check() {
// TODO Auto-generated method stub
try
{
DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
//get current date time with Date()
Date date = new Date();
System.out.println(dateFormat.format(date));
Calendar cal = Calendar.getInstance();
System.out.println(dateFormat.format(cal.getTime()));
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
Date date1 = sdf.parse("31/01/2011");
Date datecompare=sdf.parse(dateFormat.format(cal.getTime()));
Date date2 = sdf.parse("15/02/2011");
System.out.println(sdf.format(date1));
System.out.println(sdf.format(date2));
System.out.println(sdf.format(datecompare));
if((datecompare.compareTo(date1)>0)&&(datecompare.compareTo(date2)<0))
{
flag=1;
}}
catch (Exception ex)
{
System.out.println(ex);
}
System.out.println(flag);
return flag;
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) {
// TODO Auto-generated method stub
HttpSession sess=request.getSession(true);
try{
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet flights</title>");
out.println("</head>");
out.println("<body>");
double result;
new ClassExchange().check();
String per=(String)
sess.getAttribute("per");
Float persons=Float.parseFloat(per);
System.out.println(persons);
System.out.println("Cukoos_Class_Exchange_Pattern");
result = new
ClassExchange(persons).discount();//aspect is called here
System.out.println("result = " +result);
out.println("<form method=post
action=Display_Details>");
out.println("</body>");
out.println("</html>");
out.println("<input name=flight_submit value=BOOK NOW
type=submit>");
out.println("</form>");
}
catch(Exception ex)
{
System.out.println(ex);
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request,
HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
}
pls help me... i dont know what to do....when i tried without using
servlet...i got perfect answer pls......
thanks in advance.....
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