semesterdao.java

sistem information for universitas

package dao;
import java.util.ArrayList;
import java.util.List;
import model.ObjectPaging;
import model.Semester;
import org.hibernate.Query;
import org.hibernate.Session;
public class SemesterDAO {
    int semesterPerPage=20;
    public SemesterDAO() {
    }
    public Semester loadSemester(long id) throws Exception {
        HibernateUtil.beginTransaction();
        Session session=HibernateUtil.getSession();
        Semester semester=null;
        try {
            semester=(Semester)session.load(Semester.class,id);
        } catch(Exception ex) {
            throw ex;
        }
        return semester;
    }
    public Semester getSemesterSekarang() throws Exception {
        HibernateUtil.beginTransaction();
        Session session=HibernateUtil.getSession();
        Semester semester=null;
        List list=new ArrayList();
        try {
            list=session.createQuery("SELECT semester FROM Semester semester ORDER BY semester.id DESC").list();
            semester=(Semester)list.get(0);
        } catch(Exception ex) {
            throw ex;
        }
        return semester;
    }
    public Semester getSemesterSebelumnya() throws Exception {
        HibernateUtil.beginTransaction();
        Session session=HibernateUtil.getSession();
        Semester semester=null;
        List list=new ArrayList();
        try {
            list=session.createQuery("SELECT semester FROM Semester semester ORDER BY semester.id DESC").list();
            if(list.size()>1) {
                semester=(Semester)list.get(1);
            } else {
                semester=(Semester)list.get(0);
            }
        } catch(Exception ex) {
            throw ex;
        }
        return semester;
    }
    //=======NO PAGING=======
    public List getListSemester() throws Exception {
        HibernateUtil.beginTransaction();
        Session session=HibernateUtil.getSession();
        List list=new ArrayList();
        try {
            list=session.createQuery("FROM Semester").list();
        } catch(Exception ex) {
            throw ex;
        }
        return list;
    }
    //=======NO PAGING=======
    //=======PAGING=======
    public ObjectPaging getListSemester(int pageNumber) throws Exception {
        HibernateUtil.beginTransaction();
        ObjectPaging objectPaging=new ObjectPaging();
        int totalItem=getListSemester().size();
        int totalPage=totalItem/semesterPerPage;
        if(totalItem%semesterPerPage>0)totalPage++;
        if(pageNumber<1) {
            pageNumber=1;
        }
        if(pageNumber>totalPage) {
            pageNumber=totalPage;
        }
        Session session=HibernateUtil.getSession();
        List list=new ArrayList();
        try {
            Query query=session.createQuery("FROM Semester");
            list=query.setFirstResult(semesterPerPage*(pageNumber-1))
            .setMaxResults(semesterPerPage).list();
        } catch(Exception ex) {
            throw ex;
        }
        int beginPagePaging=pageNumber-5;
        int endedPagePaging=pageNumber+5;
        if(beginPagePaging<1) {
            beginPagePaging=1;
            endedPagePaging=11;
            if(endedPagePaging>totalPage) {
                endedPagePaging=totalPage;
            }
        } else if(endedPagePaging>totalPage) {
            endedPagePaging=totalPage;
            beginPagePaging=totalPage-10;
            if(beginPagePaging<1) {
                beginPagePaging=1;
            }
        }
        List listPaging=new ArrayList();
        for(int i=beginPagePaging;i<=endedPagePaging;i++) {
            listPaging.add(i);
        }
        objectPaging.setListObject(list);
        objectPaging.setListPaging(listPaging);
        objectPaging.setPageNumber(pageNumber);
        objectPaging.setTotalPage(totalPage);
        return objectPaging;
    }
    //=======PAGING=======
}