JBoss-IDE 1.2.2 簡介 (Hibernate) 3:
接著是 compute 方法:
/**
* @param number
* @return
*
* @ejb.interface-method view-type = "remote"
*/
public double[] compute(int number) {
if (number < 0) {
throw new EJBException("Argument should be positive");
}
double[] suite = new double[number + 1];
suite[0] = 0;
if (number == 0) {
return suite;
}
// hibernate section
try {
Session session = HibernateUtil.currentSession();
Transaction tx = session.beginTransaction();
// compare the input and db is same result
int max = ( (Integer) session.iterate("select count(num.value) from tutorial.hibernate.Num num").next() ).intValue();
if (max == number) { // results already in db
Query query = session.createQuery("select num from tutorial.hibernate.Num num order by num.value asc");
int i = 1;
for (Iterator it = query.iterate(); it.hasNext();) {
Num num = (Num) it.next();
suite[i] = num.getValue();
i++;
}
}
else { // need to calc again
// clear the table first
int r = session.delete("from tutorial.hibernate.Num");
Num n = new Num();
suite[1] = 1;
n.setValue(suite[1]);
session.save(n);
for (int i = 2; i <= number; i++) {
n = new Num();
suite[i] = suite[i - 1] + suite[i - 2];
n.setValue(suite[i]);
session.save(n);
}
}
tx.commit();
HibernateUtil.closeSession();
}
catch (HibernateException he){
he.printStackTrace();
}
return suite;
}
完成後在 Package Explorer 應可看到此圖
最後 compile 一下 project, 右擊 tutorial project -> 'Build Project'
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