com.nitish.project.springfirst.entity.DAO.impl.FileUploadDAOImpl.java Source code

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Here is the source code for com.nitish.project.springfirst.entity.DAO.impl.FileUploadDAOImpl.java

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package com.nitish.project.springfirst.entity.DAO.impl;

import com.nitish.project.springfirst.entity.DAO.FileUploadDAO;
import com.nitish.project.springfirst.entity.FileUpload;
import com.nitish.project.springfirst.entity.UserLogin;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.criterion.Projection;
import org.hibernate.criterion.Projections;

/**
 *
 * @author Nitish
 */
public class FileUploadDAOImpl implements FileUploadDAO {
    private SessionFactory factory;
    private Session session;
    private Transaction transaction;

    public FileUploadDAOImpl() {
        factory = new Configuration().addAnnotatedClass(FileUpload.class).configure().buildSessionFactory();
        session = factory.openSession();
    }

    @Override
    public void insert(FileUpload data) {
        try {
            transaction = session.beginTransaction();
            session.save(data);
            transaction.commit();
        } catch (HibernateException ex) {
            transaction.rollback();
        } finally {
            session.close();
        }
    }

    @Override
    public FileUpload getFile(String filename) {
        transaction = session.beginTransaction();
        String str_message = "The Requested File is Not found!!!";
        FileUpload message = new FileUpload(str_message);
        List<FileUpload> fileuploadlist = session.createQuery("From FileUpload").list();
        Criteria retrieve_filename = session.createCriteria(FileUpload.class);
        List<String> ret_filename = retrieve_filename.setProjection(Projections.property("filename")).list();
        for (int i = 0; i < ret_filename.size(); i++) {
            if (ret_filename.get(i).equals(filename)) {
                transaction.commit();
                session.close();
                return fileuploadlist.get(i);
            }
        }
        transaction.commit();
        session.close();
        return message;
    }

    @Override
    public List<FileUpload> getFileDescription() {
        List<FileUpload> filedesc = session.createQuery("From FileUpload").list();
        session.close();
        return filedesc;
    }

    @Override
    public boolean checkFilename(String filename) {
        Criteria return_fileName = session.createCriteria(FileUpload.class);
        List<String> filename_List = return_fileName.setProjection(Projections.property("filename")).list();
        for (int i = 0; i < filename_List.size(); i++) {
            if (filename.equals(filename_List.get(i))) {
                return true;
            }
        }
        return false;
    }

}