svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.impl / src / main / java / org / gvsig / fmap / dal / feature / impl / LabelsCacheForFieldValuesImpl.java
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1 | 46996 | jjdelcerro | package org.gvsig.fmap.dal.feature.impl; |
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2 | |||
3 | import org.gvsig.fmap.dal.feature.LabelsCacheForFieldValues; |
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4 | import java.util.HashMap; |
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5 | import java.util.Map; |
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6 | import java.util.Objects; |
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7 | import org.apache.commons.lang3.StringUtils; |
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8 | import org.gvsig.fmap.dal.feature.EditableForeingKey; |
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9 | import org.gvsig.fmap.dal.feature.Feature; |
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10 | import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
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11 | import org.gvsig.fmap.dal.feature.FeatureStore; |
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12 | import org.gvsig.fmap.dal.feature.FeatureType; |
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13 | import org.gvsig.tools.dynobject.DynObjectValueItem; |
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14 | import org.gvsig.tools.task.SimpleTaskStatus; |
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15 | import org.gvsig.tools.util.Invocable; |
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16 | import org.slf4j.Logger; |
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17 | import org.slf4j.LoggerFactory; |
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18 | |||
19 | /**
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20 | *
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21 | * @author jjdelcerro
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22 | */
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23 | @SuppressWarnings("UseSpecificCatch") |
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24 | public class LabelsCacheForFieldValuesImpl implements LabelsCacheForFieldValues { |
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25 | |||
26 | protected static final Logger LOGGER = LoggerFactory.getLogger(LabelsCacheForFieldValuesImpl.class); |
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27 | |||
28 | private static final DynObjectValueItem[] INVALID_AVAILABLE_VALUES = new DynObjectValueItem[1]; |
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29 | |||
30 | private final Map<String, DynObjectValueItem[]> availableValues; |
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31 | private final Invocable labelFormulaProvider; |
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32 | private final SimpleTaskStatus status; |
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33 | |||
34 | public LabelsCacheForFieldValuesImpl(Invocable labelFormulaProvider, SimpleTaskStatus status) {
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35 | this.availableValues = new HashMap<>(); |
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36 | this.labelFormulaProvider = labelFormulaProvider;
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37 | this.status = status;
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38 | } |
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39 | |||
40 | public LabelsCacheForFieldValuesImpl() {
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41 | this(null, null); |
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42 | } |
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43 | |||
44 | private void message(String msg) { |
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45 | if( this.status == null ) { |
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46 | return;
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47 | } |
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48 | this.status.message(msg);
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49 | } |
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50 | |||
51 | private DynObjectValueItem[] getAvailableValuesFromCache(String fieldName) { |
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52 | return this.availableValues.get(fieldName); |
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53 | } |
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54 | |||
55 | private void addAvailableValuesToCache(String fieldName, DynObjectValueItem[] values) { |
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56 | this.availableValues.put(fieldName, values);
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57 | } |
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58 | |||
59 | private boolean areValidAvailableValues(DynObjectValueItem[] values) { |
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60 | return values!=null && values!=INVALID_AVAILABLE_VALUES; |
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61 | } |
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62 | |||
63 | private void invalidateAvailableValuesInCache(String fieldName) { |
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64 | this.availableValues.put(fieldName, INVALID_AVAILABLE_VALUES);
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65 | } |
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66 | |||
67 | private String getAlternativeLabelFormula(FeatureType featureType, Feature feature, String fieldName) { |
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68 | if( this.labelFormulaProvider==null ) { |
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69 | return null; |
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70 | } |
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71 | String labelPhrase = (String) labelFormulaProvider.call(featureType,feature,fieldName); |
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72 | // FeatureAttributeDescriptor attr = featureType.getAttributeDescriptor(fieldName);
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73 | // String labelPhrase = attr.getTags().getString(TAG_REPORT_ATTR_LABEL, null);
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74 | return labelPhrase;
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75 | } |
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76 | |||
77 | @Override
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78 | public String getLabelForFieldValue(Feature feature, String fieldName) { |
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79 | FeatureStore store = feature.getStore(); |
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80 | String availableValuesId = store.getFullName()+"/"+fieldName; |
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81 | String availableValuesLabelId = store.getName()+"/"+fieldName; |
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82 | |||
83 | DynObjectValueItem[] theAvailableValues = this.getAvailableValuesFromCache(availableValuesId); |
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84 | Object value = feature.get(fieldName);
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85 | try {
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86 | if (theAvailableValues==null) { |
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87 | FeatureType featureType = feature.getType(); |
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88 | FeatureAttributeDescriptor attr = featureType.getAttributeDescriptor(fieldName); |
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89 | |||
90 | String labelFormula = this.getAlternativeLabelFormula(featureType, feature, fieldName); |
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91 | if (StringUtils.isBlank(labelFormula)) {
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92 | if (attr.hasAvailableValues()) {
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93 | message("Loading values for "+availableValuesLabelId);
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94 | this.addAvailableValuesToCache(availableValuesId, attr.getAvailableValues(null)); |
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95 | } |
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96 | } else {
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97 | if (attr.isForeingKey()) {
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98 | EditableForeingKey fk; |
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99 | try {
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100 | fk = (EditableForeingKey) attr.getForeingKey().clone(); |
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101 | fk.unbind(); |
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102 | fk.setLabelFormula(labelFormula); |
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103 | message("Loading values for "+availableValuesLabelId);
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104 | this.addAvailableValuesToCache(availableValuesId, fk.getAvailableValues(null)); |
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105 | } catch (CloneNotSupportedException ex) { |
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106 | LOGGER.warn("Not able to clone foreing key. "+ex.toString());
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107 | } |
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108 | } |
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109 | } |
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110 | theAvailableValues = this.getAvailableValuesFromCache(availableValuesId);
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111 | } |
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112 | |||
113 | if ( this.areValidAvailableValues(theAvailableValues) ) { |
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114 | for (DynObjectValueItem theAvailableValue : theAvailableValues) {
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115 | if (Objects.equals(value, theAvailableValue.getValue())) {
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116 | return theAvailableValue.getLabel();
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117 | } |
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118 | } |
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119 | } |
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120 | |||
121 | } catch (Exception ex) { |
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122 | LOGGER.warn("Fail", ex);
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123 | this.invalidateAvailableValuesInCache(availableValuesId);
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124 | } |
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125 | 47008 | jjdelcerro | return Objects.toString(value,""); |
126 | 46996 | jjdelcerro | |
127 | } |
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128 | |||
129 | } |