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annotate src/main/java/edu/harvard/iq/dataverse/DatasetFieldServiceBean.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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children
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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.List;
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9 import javax.ejb.Stateless;
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10 import javax.inject.Named;
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11 import javax.persistence.EntityManager;
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12 import javax.persistence.NoResultException;
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13 import javax.persistence.NonUniqueResultException;
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14 import javax.persistence.PersistenceContext;
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15 import javax.persistence.Query;
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16 import javax.persistence.TypedQuery;
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17
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18 /**
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19 *
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20 * @author xyang
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21 */
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22 @Stateless
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23 @Named
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24 public class DatasetFieldServiceBean implements java.io.Serializable {
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25
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26 @PersistenceContext(unitName = "VDCNet-ejbPU")
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27 private EntityManager em;
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28
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29 private static final String NAME_QUERY = "SELECT dsfType from DatasetFieldType dsfType where dsfType.name= :fieldName";
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30
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31 public List<DatasetFieldType> findAllAdvancedSearchFieldTypes() {
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32 return em.createQuery("select object(o) from DatasetFieldType as o where o.advancedSearchFieldType = true and o.title != '' order by o.id").getResultList();
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33 }
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34
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35 public List<DatasetFieldType> findAllFacetableFieldTypes() {
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36 return em.createNamedQuery("DatasetFieldType.findAllFacetable", DatasetFieldType.class)
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37 .getResultList();
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38 }
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39
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40 public List<DatasetFieldType> findFacetableFieldTypesByMetadataBlock(Long metadataBlockId) {
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41 return em.createNamedQuery("DatasetFieldType.findFacetableByMetadaBlock", DatasetFieldType.class)
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42 .setParameter("metadataBlockId", metadataBlockId)
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43 .getResultList();
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44 }
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45
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46 public List<DatasetFieldType> findAllRequiredFields() {
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47 return em.createQuery("select object(o) from DatasetFieldType as o where o.required = true order by o.id").getResultList();
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48 }
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49
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50 public List<DatasetFieldType> findAllOrderedById() {
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51 return em.createQuery("select object(o) from DatasetFieldType as o order by o.id").getResultList();
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52 }
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53
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54 public List<DatasetFieldType> findAllOrderedByName() {
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55 return em.createQuery("select object(o) from DatasetFieldType as o order by o.name").getResultList();
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56 }
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57
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58 public DatasetFieldType find(Object pk) {
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59 return (DatasetFieldType) em.find(DatasetFieldType.class, pk);
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60 }
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61
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62 public DatasetFieldType findByName(String name) {
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63 try {
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64 return (DatasetFieldType) em.createQuery(NAME_QUERY).setParameter("fieldName", name).getSingleResult();
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65 } catch (NoResultException e) {
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66 return null;
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67 }
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68
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69 }
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70
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71 /**
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72 * Gets the dataset field type, or returns {@code null}. Does not throw
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73 * exceptions.
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74 *
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75 * @param name the name do the field type
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76 * @return the field type, or {@code null}
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77 * @see #findByName(java.lang.String)
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78 */
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79 public DatasetFieldType findByNameOpt(String name) {
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80 try {
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81 return em.createNamedQuery("DatasetFieldType.findByName", DatasetFieldType.class)
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82 .setParameter("name", name)
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83 .getSingleResult();
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84 } catch (NoResultException nre) {
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85 return null;
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86 }
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87 }
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88
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89 /*
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90 * Similar method for looking up foreign metadata field mappings, for metadata
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91 * imports. for these the uniquness of names isn't guaranteed (i.e., there
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92 * can be a field "author" in many different formats that we want to support),
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93 * so these have to be looked up by both the field name and the name of the
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94 * foreign format.
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95 */
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96 public ForeignMetadataFieldMapping findFieldMapping(String formatName, String pathName) {
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97 try {
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98 return em.createNamedQuery("ForeignMetadataFieldMapping.findByPath", ForeignMetadataFieldMapping.class)
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99 .setParameter("formatName", formatName)
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100 .setParameter("xPath", pathName)
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101 .getSingleResult();
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102 } catch (NoResultException nre) {
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103 return null;
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104 }
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105
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106 // TODO: cache looked up results.
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107 }
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108
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109 public ControlledVocabularyValue findControlledVocabularyValue(Object pk) {
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110 return (ControlledVocabularyValue) em.find(ControlledVocabularyValue.class, pk);
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111 }
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112
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113 /**
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114 * @param dsft The DatasetFieldType in which to look up a
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115 * ControlledVocabularyValue.
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116 * @param strValue String value that may exist in a controlled vocabulary of
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117 * the provided DatasetFieldType.
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118 * @param lenient should we accept alternate spellings for value from mapping table
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119 *
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120 * @return The ControlledVocabularyValue found or null.
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121 */
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122 public ControlledVocabularyValue findControlledVocabularyValueByDatasetFieldTypeAndStrValue(DatasetFieldType dsft, String strValue, boolean lenient) {
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123 TypedQuery<ControlledVocabularyValue> typedQuery = em.createQuery("SELECT OBJECT(o) FROM ControlledVocabularyValue AS o WHERE o.strValue = :strvalue AND o.datasetFieldType = :dsft", ControlledVocabularyValue.class);
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124 typedQuery.setParameter("strvalue", strValue);
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125 typedQuery.setParameter("dsft", dsft);
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126 try {
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127 ControlledVocabularyValue cvv = typedQuery.getSingleResult();
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128 return cvv;
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129 } catch (NoResultException | NonUniqueResultException ex) {
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130 if (lenient) {
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131 // if the value isn't found, check in the list of alternate values for this datasetFieldType
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132 TypedQuery<ControlledVocabAlternate> alternateQuery = em.createQuery("SELECT OBJECT(o) FROM ControlledVocabAlternate as o WHERE o.strValue = :strvalue AND o.datasetFieldType = :dsft", ControlledVocabAlternate.class);
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133 alternateQuery.setParameter("strvalue", strValue);
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134 alternateQuery.setParameter("dsft", dsft);
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135 try {
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136 ControlledVocabAlternate alternateValue = alternateQuery.getSingleResult();
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137 return alternateValue.getControlledVocabularyValue();
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138 } catch (NoResultException | NonUniqueResultException ex2) {
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139 return null;
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140 }
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141
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142 } else {
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143 return null;
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144 }
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145 }
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146 }
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147
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148 // return singleton NA Controled Vocabulary Value
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149 public ControlledVocabularyValue findNAControlledVocabularyValue() {
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150 TypedQuery<ControlledVocabularyValue> typedQuery = em.createQuery("SELECT OBJECT(o) FROM ControlledVocabularyValue AS o WHERE o.datasetFieldType is null AND o.strValue = :strvalue", ControlledVocabularyValue.class);
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151 typedQuery.setParameter("strvalue", DatasetField.NA_VALUE);
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152 return typedQuery.getSingleResult();
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153 }
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154
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155 public DatasetFieldType save(DatasetFieldType dsfType) {
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156 return em.merge(dsfType);
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157 }
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158
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159 public MetadataBlock save(MetadataBlock mdb) {
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160 return em.merge(mdb);
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161 }
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162
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163 public ControlledVocabularyValue save(ControlledVocabularyValue cvv) {
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164 return em.merge(cvv);
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165 }
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166
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167 public ControlledVocabAlternate save(ControlledVocabAlternate alt) {
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168 return em.merge(alt);
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169 }
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170
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171 }