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 @ 47008
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package org.gvsig.fmap.dal.feature.impl; |
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import org.gvsig.fmap.dal.feature.LabelsCacheForFieldValues; |
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import java.util.HashMap; |
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import java.util.Map; |
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import java.util.Objects; |
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import org.apache.commons.lang3.StringUtils; |
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import org.gvsig.fmap.dal.feature.EditableForeingKey; |
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import org.gvsig.fmap.dal.feature.Feature; |
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import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
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import org.gvsig.fmap.dal.feature.FeatureStore; |
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import org.gvsig.fmap.dal.feature.FeatureType; |
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import org.gvsig.tools.dynobject.DynObjectValueItem; |
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import org.gvsig.tools.task.SimpleTaskStatus; |
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import org.gvsig.tools.util.Invocable; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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/**
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*
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* @author jjdelcerro
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*/
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@SuppressWarnings("UseSpecificCatch") |
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public class LabelsCacheForFieldValuesImpl implements LabelsCacheForFieldValues { |
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protected static final Logger LOGGER = LoggerFactory.getLogger(LabelsCacheForFieldValuesImpl.class); |
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private static final DynObjectValueItem[] INVALID_AVAILABLE_VALUES = new DynObjectValueItem[1]; |
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private final Map<String, DynObjectValueItem[]> availableValues; |
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private final Invocable labelFormulaProvider; |
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private final SimpleTaskStatus status; |
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public LabelsCacheForFieldValuesImpl(Invocable labelFormulaProvider, SimpleTaskStatus status) {
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this.availableValues = new HashMap<>(); |
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this.labelFormulaProvider = labelFormulaProvider;
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this.status = status;
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} |
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public LabelsCacheForFieldValuesImpl() {
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this(null, null); |
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} |
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private void message(String msg) { |
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if( this.status == null ) { |
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return;
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} |
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this.status.message(msg);
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} |
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private DynObjectValueItem[] getAvailableValuesFromCache(String fieldName) { |
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return this.availableValues.get(fieldName); |
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} |
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private void addAvailableValuesToCache(String fieldName, DynObjectValueItem[] values) { |
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this.availableValues.put(fieldName, values);
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} |
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private boolean areValidAvailableValues(DynObjectValueItem[] values) { |
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return values!=null && values!=INVALID_AVAILABLE_VALUES; |
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} |
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private void invalidateAvailableValuesInCache(String fieldName) { |
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this.availableValues.put(fieldName, INVALID_AVAILABLE_VALUES);
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} |
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private String getAlternativeLabelFormula(FeatureType featureType, Feature feature, String fieldName) { |
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if( this.labelFormulaProvider==null ) { |
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return null; |
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} |
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String labelPhrase = (String) labelFormulaProvider.call(featureType,feature,fieldName); |
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// FeatureAttributeDescriptor attr = featureType.getAttributeDescriptor(fieldName);
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// String labelPhrase = attr.getTags().getString(TAG_REPORT_ATTR_LABEL, null);
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return labelPhrase;
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} |
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@Override
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public String getLabelForFieldValue(Feature feature, String fieldName) { |
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FeatureStore store = feature.getStore(); |
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String availableValuesId = store.getFullName()+"/"+fieldName; |
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String availableValuesLabelId = store.getName()+"/"+fieldName; |
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DynObjectValueItem[] theAvailableValues = this.getAvailableValuesFromCache(availableValuesId); |
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Object value = feature.get(fieldName);
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try {
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if (theAvailableValues==null) { |
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FeatureType featureType = feature.getType(); |
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FeatureAttributeDescriptor attr = featureType.getAttributeDescriptor(fieldName); |
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String labelFormula = this.getAlternativeLabelFormula(featureType, feature, fieldName); |
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if (StringUtils.isBlank(labelFormula)) {
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if (attr.hasAvailableValues()) {
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message("Loading values for "+availableValuesLabelId);
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this.addAvailableValuesToCache(availableValuesId, attr.getAvailableValues(null)); |
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} |
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} else {
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if (attr.isForeingKey()) {
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EditableForeingKey fk; |
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try {
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fk = (EditableForeingKey) attr.getForeingKey().clone(); |
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fk.unbind(); |
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fk.setLabelFormula(labelFormula); |
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message("Loading values for "+availableValuesLabelId);
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this.addAvailableValuesToCache(availableValuesId, fk.getAvailableValues(null)); |
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} catch (CloneNotSupportedException ex) { |
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LOGGER.warn("Not able to clone foreing key. "+ex.toString());
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} |
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} |
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} |
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theAvailableValues = this.getAvailableValuesFromCache(availableValuesId);
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} |
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if ( this.areValidAvailableValues(theAvailableValues) ) { |
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for (DynObjectValueItem theAvailableValue : theAvailableValues) {
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if (Objects.equals(value, theAvailableValue.getValue())) {
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return theAvailableValue.getLabel();
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} |
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} |
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} |
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} catch (Exception ex) { |
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LOGGER.warn("Fail", ex);
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this.invalidateAvailableValuesInCache(availableValuesId);
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} |
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return Objects.toString(value,""); |
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} |
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} |