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annotate src/main/java/edu/harvard/iq/dataverse/DatasetLinkingServiceBean.java @ 10:a50cf11e5178

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Rewrite LGDataverse completely upgrading to dataverse4.0
author Zoe Hong <zhong@mpiwg-berlin.mpg.de>
date Tue, 08 Sep 2015 17:00:21 +0200
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10
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1 /*
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2 * To change this license header, choose License Headers in Project Properties.
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3 * To change this template file, choose Tools | Templates
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4 * and open the template in the editor.
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5 */
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6 package edu.harvard.iq.dataverse;
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7
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8 import java.util.ArrayList;
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9 import java.util.List;
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10 import javax.ejb.Stateless;
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11 import javax.inject.Named;
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12 import javax.persistence.EntityManager;
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13 import javax.persistence.PersistenceContext;
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14 import javax.persistence.Query;
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15 import javax.persistence.TypedQuery;
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16
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17 /**
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18 *
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19 * @author skraffmiller
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20 */
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21 @Stateless
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22 @Named
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23 public class DatasetLinkingServiceBean implements java.io.Serializable {
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24
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25 @PersistenceContext(unitName = "VDCNet-ejbPU")
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26 private EntityManager em;
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27
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28 /**
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29 * @todo Should this method simply be deleted? It isn't used anywhere and is
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30 * throwing exceptions: Syntax error parsing [select object(o.dataverse.id)
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31 * from DatasetLinkingDataverse as o where o.linkingDataverse.id
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32 * =:linkingDataverseId order by o.id]
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33 */
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34 @Deprecated
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35 public List<Dataset> findLinkedDataverses(Long linkingDataverseId) {
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36 List<Dataset> retList = new ArrayList();
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37 Query query = em.createQuery("select object(o.dataverse.id) from DatasetLinkingDataverse as o where o.linkingDataverse.id =:linkingDataverseId order by o.id");
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38 query.setParameter("linkingDataverseId", linkingDataverseId);
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39 for (Object o : query.getResultList()) {
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40 DatasetLinkingDataverse convterted = (DatasetLinkingDataverse) o;
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41 retList.add(convterted.getDataset());
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42 }
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43 return retList;
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44 }
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45
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46 public List<Dataset> findDatasetsThisDataverseIdHasLinkedTo(Long dataverseId) {
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47 List<Dataset> datasets = new ArrayList<>();
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48 TypedQuery<DatasetLinkingDataverse> typedQuery = em.createQuery("SELECT OBJECT(o) FROM DatasetLinkingDataverse AS o WHERE o.linkingDataverse.id = :dataverseId", DatasetLinkingDataverse.class);
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49 typedQuery.setParameter("dataverseId", dataverseId);
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50 List<DatasetLinkingDataverse> datasetLinkingDataverses = typedQuery.getResultList();
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51 for (DatasetLinkingDataverse datasetLinkingDataverse : datasetLinkingDataverses) {
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52 datasets.add(datasetLinkingDataverse.getDataset());
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53 }
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54 return datasets;
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55 }
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56
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57 public List<Dataverse> findLinkingDataverses(Long datasetId) {
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58 List<Dataverse> retList = new ArrayList();
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59 for (DatasetLinkingDataverse dld : findDatasetLinkingDataverses(datasetId)) {
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60 retList.add(dld.getLinkingDataverse());
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61 }
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62 return retList;
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63 }
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64
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65 public List<DatasetLinkingDataverse> findDatasetLinkingDataverses(Long datasetId) {
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66 return em.createQuery("select object(o) from DatasetLinkingDataverse as o where o.dataset.id =:datasetId order by o.id")
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67 .setParameter("datasetId", datasetId)
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68 .getResultList();
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69 }
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70
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71 public void save(DatasetLinkingDataverse datasetLinkingDataverse) {
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72 if (datasetLinkingDataverse.getId() == null) {
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73 em.persist(datasetLinkingDataverse);
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74 } else {
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75 em.merge(datasetLinkingDataverse);
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76 }
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77 }
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78
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79 public boolean alreadyLinked(Dataverse dataverse, Dataset dataset) {
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80 TypedQuery<DatasetLinkingDataverse> typedQuery = em.createQuery("SELECT OBJECT(o) FROM DatasetLinkingDataverse AS o WHERE o.linkingDataverse.id = :dataverseId AND o.dataset.id = :datasetId", DatasetLinkingDataverse.class);
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81 typedQuery.setParameter("dataverseId", dataverse.getId());
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82 typedQuery.setParameter("datasetId", dataset.getId());
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83 return !typedQuery.getResultList().isEmpty();
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84 }
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85
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86 }