src/java/org/ufcspa/simdecs/bn/ui/FileUploadController.java

   1 /*
   2  * To change this template, choose Tools | Templates
   3  * and open the template in the editor.
   4  */
   5 package org.ufcspa.simdecs.bn.ui;
   6
   7 import java.io.*;
   8 import java.util.ArrayList;
   9 import java.util.logging.Level;
  10 import java.util.logging.Logger;
  11 import javax.annotation.Resource;
  12 import javax.faces.application.FacesMessage;
  13 import javax.faces.bean.ApplicationScoped;
  14 import javax.faces.bean.ManagedBean;
  15 import javax.faces.context.FacesContext;
  16 import javax.persistence.EntityManager;
  17 import javax.persistence.EntityManagerFactory;
  18 import javax.persistence.PersistenceUnit;
  19 import javax.transaction.UserTransaction;
  20 import javax.xml.bind.JAXBException;
  21 import org.primefaces.event.FileUploadEvent;
  22 import org.primefaces.model.UploadedFile;
  23 import org.ufcspa.simdecs.bn.entity.BayesianNetwork;
  24 import org.ufcspa.simdecs.bn.entity.Node;
  25 import unbbayes.io.exception.LoadException;
  26 import unbbayes.io.xmlbif.version6.XMLBIFIO;
  27 import unbbayes.prs.bn.ProbabilisticNetwork;
  28
  29 /**
  30  *
  31  * @author mchelem
  32  */
  33 @ManagedBean(name = "fileUploadController")
  34 @ApplicationScoped
  35 public class FileUploadController implements Serializable {
  36     @Resource
  37     private UserTransaction utx = null;
  38     @PersistenceUnit(unitName = "simdecsEclipseLinkPU")
  39     private EntityManagerFactory emf = null;
  40     EntityManager em = null;
  41
  42     private static final Logger logger = Logger.getLogger("" + FileUploadController.class);
  43
  44     private File saveUploadedFile(UploadedFile uploadedFile) throws IOException{
  45         InputStream in = new BufferedInputStream(uploadedFile.getInputstream());
  46         File file = new File(uploadedFile.getFileName());
  47         FileOutputStream fout = new FileOutputStream(file);
  48         while(in.available() != 0){
  49             fout.write(in.read());
  50         }
  51         logger.log(Level.INFO, "Uploaded file saved in: {0}", file.getAbsolutePath());
  52         return file;
  53     }
  54
  55     private void persist(BayesianNetwork bayesianNetwork){
  56         em = emf.createEntityManager();
  57         try {
  58             utx.begin();
  59             em.persist(bayesianNetwork);
  60             utx.commit();
  61             } catch (Exception e) {
  62                 try {
  63                     utx.rollback();
  64                 } catch (Exception ex) {
  65                     Logger.getLogger(FileUploadController.class.getName()).log(Level.SEVERE, null, ex);
  66                 }
  67                 Logger.getLogger(FileUploadController.class.getName()).log(Level.INFO, null, e);
  68             }
  69         logger.log(Level.INFO, "Bayesian Network {0} persisted.", bayesianNetwork.getName());
  70
  71     }
  72
  73
  74     public void handleFileUpload(FileUploadEvent event) {
  75         try {
  76             File file = this.saveUploadedFile(event.getFile());
  77             // required to run unbbayes gui classes on server
  78             System.setProperty("java.awt.headless", "false");
  79
  80             ProbabilisticNetwork bn = new ProbabilisticNetwork(null);
  81             XMLBIFIO.loadXML(new File(file.getAbsolutePath()), bn);
  82             BayesianNetwork bayesianNetwork = new BayesianNetwork();
  83             bayesianNetwork.setName(bn.getName());
  84
  85             ArrayList<Node> nodes = new ArrayList<Node>();
  86             for (unbbayes.prs.Node prs_node: bn.getNodes()){
  87                 Node node = new Node();
  88                 node.setName(prs_node.getName());
  89                 node.setBayesianNetwork(bayesianNetwork);
  90                 nodes.add(node);
  91             }
  92             bayesianNetwork.setNodes(nodes);
  93             persist(bayesianNetwork);
  94
  95             FacesMessage msg = new FacesMessage("Succesful", event.getFile().getFileName() + " is uploaded.");
  96             FacesContext.getCurrentInstance().addMessage(null, msg);
  97         } catch (LoadException ex) {
  98             Logger.getLogger(FileUploadController.class.getName()).log(Level.SEVERE, null, ex);
  99         } catch (IOException ex) {
 100             Logger.getLogger(FileUploadController.class.getName()).log(Level.SEVERE, null, ex);
 101         } catch (JAXBException ex) {
 102             Logger.getLogger(FileUploadController.class.getName()).log(Level.SEVERE, null, ex);
 103         }
 104     }
 105 }
 106