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 / impl / expressionevaluator / DefaultFeatureSymbolTable.java @ 44533
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package org.gvsig.fmap.dal.impl.expressionevaluator; |
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import java.util.Arrays; |
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import java.util.List; |
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import org.apache.commons.lang3.Range; |
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import org.apache.commons.lang3.StringUtils; |
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import org.gvsig.expressionevaluator.ExpressionBuilder; |
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import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator; |
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import org.gvsig.expressionevaluator.ExpressionEvaluatorManager; |
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import org.gvsig.expressionevaluator.ExpressionRuntimeException; |
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import org.gvsig.expressionevaluator.ExpressionUtils; |
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import org.gvsig.expressionevaluator.Interpreter; |
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import org.gvsig.expressionevaluator.MutableSymbolTable; |
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import org.gvsig.expressionevaluator.spi.AbstractFunction; |
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import org.gvsig.expressionevaluator.spi.AbstractSymbolTable; |
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import org.gvsig.fmap.dal.DALLocator; |
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import org.gvsig.fmap.dal.DataManager; |
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import static org.gvsig.fmap.dal.DataManager.FUNCTION_FOREING_VALUE; |
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import org.gvsig.fmap.dal.DataStore; |
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import org.gvsig.fmap.dal.StoresRepository; |
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import org.gvsig.fmap.dal.expressionevaluator.FeatureSymbolTable; |
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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.FeatureSelection; |
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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.fmap.dal.feature.ForeingKey; |
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import org.gvsig.fmap.dal.impl.expressionevaluator.DALSymbolTable.FeaturesFunction; |
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import org.gvsig.tools.dynobject.DynObjectAdapter; |
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import org.gvsig.tools.dynobject.exception.DynFieldNotFoundException; |
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import org.gvsig.tools.script.Script; |
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import org.gvsig.tools.util.UnmodifiableBasicList; |
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import org.gvsig.tools.util.UnmodifiableBasicListAdapter; |
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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 DefaultFeatureSymbolTable extends AbstractSymbolTable implements FeatureSymbolTable { |
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// public static final String FUNCTION_FEATURES = "FEATURES";
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//
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// public class FeaturesFunction extends AbstractFunction {
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//
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// public FeaturesFunction() {
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// super(
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// "Data access",
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// FUNCTION_FEATURES,
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// Range.between(1, 3),
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// "Return a list of the features selecteds with filter in the store.",
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// FUNCTION_FEATURES + "({{store_name}}, filter, order)",
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// new String[]{
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// "store - data store name to be used",
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// "where - Optional. String value with a filter expression",
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// "order - Optional. String value with the order. must be a string with the names of separate fields with commas"
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// },
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// "LIST"
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// );
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// }
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//
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// @Override
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// public Object call(Interpreter interpreter, Object[] args) throws Exception {
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// String storeName = getStr(args, 0);
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// String where = null;
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// String order = null;
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// switch (args.length) {
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// case 2:
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// where = getStr(args, 1);
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// break;
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// case 3:
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// where = getStr(args, 1);
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// order = getStr(args, 2);
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// break;
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// }
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// try {
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// DataStore store = getStore(storeName);
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// if (store == null || !(store instanceof FeatureStore)) {
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// throw new ExpressionRuntimeException("Cant locate the store '" + storeName + "' in function '" + FUNCTION_FEATURES + "'.");
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// }
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// if (!(store instanceof FeatureStore)) {
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// throw new ExpressionRuntimeException("The store'" + storeName + "' is not valid for function '" + FUNCTION_FEATURES + "', a FeatureStore is required.");
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// }
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// FeatureStore featureStore = (FeatureStore) store;
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// List<Feature> features;
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// if (where == null && order == null) {
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// features = featureStore.getFeatures();
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// } else {
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// FeatureQuery query = featureStore.createFeatureQuery();
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// if (where != null) {
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// query.addFilter(where);
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// }
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// if (order != null) {
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// query.getOrder().add(order);
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// }
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// query.retrievesAllAttributes();
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// features = featureStore.getFeatures(query);
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// }
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// return features;
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// } catch (ExpressionRuntimeException ex) {
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// throw ex;
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// } catch (Exception ex) {
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// throw new ExpressionRuntimeException("Problems calling '" + FUNCTION_FEATURES + "' function", ex);
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// }
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// }
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//
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// protected DataStore getStore(String storeName) {
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// DataStore store = feature.getStore();
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//// DataManager dataManager = DALLocator.getDataManager();
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//// DataStore store = dataManager.getStoresRepository().getStore(storeName);
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// return store;
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// }
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// }
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public class ForeingValueFunction extends AbstractFunction { |
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public ForeingValueFunction() {
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super(
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"Data access",
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FUNCTION_FOREING_VALUE, |
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Range.is(1),
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"Return the value of a field throw a relation from other tables.",
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FUNCTION_FOREING_VALUE + "({{field_name}})",
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new String[]{ |
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"fieldName - dot separated field path or list of strings with field names."
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}, |
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"OBJECT"
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); |
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} |
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@Override
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public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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ExpressionBuilder builder = ExpressionUtils.createExpressionBuilder(); |
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UnmodifiableBasicList<String> fieldNames;
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Object fields_o = getObject(args, 0); |
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if( fields_o instanceof List ) { |
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fieldNames = new UnmodifiableBasicListAdapter<>((List<String>) fields_o); |
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} else if( fields_o instanceof String ) { |
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fieldNames = new UnmodifiableBasicListAdapter<>(Arrays.asList(((String)fields_o).split("[.]"))); |
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} else if( fields_o instanceof UnmodifiableBasicList ) { |
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fieldNames = (UnmodifiableBasicList<String>) fields_o;
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} else {
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throw new ExpressionRuntimeException( |
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"Problems calling '" + FUNCTION_FOREING_VALUE +
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"' function, type of parameter '"+fields_o.getClass().getSimpleName()+
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"' not supported, use string or list.");
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} |
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Feature currentFeature = feature; |
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try {
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String fieldName;
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Object value;
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value = feature.getExtraValue(StringUtils.join(fieldNames, "."));
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if( value != null ) { |
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return value;
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} |
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for (int i = 0; i < fieldNames.size()-1; i++) { |
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fieldName = fieldNames.get(i); |
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value = currentFeature.get(fieldName); |
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FeatureAttributeDescriptor attrdesc = currentFeature.getType().getAttributeDescriptor(fieldName); |
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ForeingKey foreingKey = attrdesc.getForeingKey(); |
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// ContextForeingKey context = foreingKey.createContext();
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currentFeature = foreingKey.getFeature(null, value);
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// DisposeUtils.disposeQuietly(context);
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if( currentFeature==null ) { |
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return null; |
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} |
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} |
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fieldName = fieldNames.get(fieldNames.size()-1);
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value = currentFeature.get(fieldName); |
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return value;
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} catch (ExpressionRuntimeException ex) {
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throw ex;
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} catch (Exception ex) { |
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throw new ExpressionRuntimeException("Problems calling '" + FUNCTION_FOREING_VALUE + "' function", ex); |
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} |
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} |
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} |
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private class LocalFeaturesFunction extends FeaturesFunction { |
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public LocalFeaturesFunction() {
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super();
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} |
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@Override
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protected DataStore getStore(String storeName) { |
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DataManager dataManager = DALLocator.getDataManager(); |
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DataStore store = null;
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if (feature != null) { |
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store = feature.getStore(); |
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store = store.getStoresRepository().getStore(storeName); |
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} |
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if (store == null) { |
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StoresRepository repository = dataManager.getStoresRepository(); |
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if (repository.containsKey(storeName)) {
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store = repository.getStore(storeName); |
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} |
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} |
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return store;
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} |
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} |
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private class FeatureFunction extends AbstractFunction { |
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public FeatureFunction() {
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super(
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"Data access",
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"feature",
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Range.is(0),
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"Access to the current feature object when used in a filter.\n"
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+ "Return null if used outer a filter.",
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"feature()",
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null,
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"Feature"
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); |
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} |
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@Override
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public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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return feature;
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} |
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} |
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public class FeatureStoreFunction extends AbstractFunction { |
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public FeatureStoreFunction() {
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super(
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"Data access",
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"store",
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Range.is(0),
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"Access to the current store object when used in a filter.\n"
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+ "Return null if used outer a filter.",
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"store()",
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null,
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"FeatureStore"
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); |
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} |
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@Override
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public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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if (feature == null) { |
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return null; |
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} |
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return feature.getStore();
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} |
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} |
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public class IsSelectedFunction extends AbstractFunction { |
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public IsSelectedFunction() {
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super(
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"Data access",
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"isSelected",
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Range.is(0),
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"Return if the current feature is selected in the store when used in a filter.\n"
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+ "Return false if used outer a filter.",
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"isSelected()",
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null,
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"Boolean"
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); |
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} |
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@Override
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public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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if (feature == null) { |
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return false; |
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} |
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FeatureStore store = feature.getStore(); |
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FeatureSelection selection = store.getFeatureSelection(); |
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return selection.isSelected(feature);
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} |
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} |
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private Feature feature;
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private FeatureType type;
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private String storeName; |
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@SuppressWarnings("OverridableMethodCallInConstructor") |
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public DefaultFeatureSymbolTable() {
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super(DataManager.DAL_SYMBOL_TABLE_FEATURE);
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// this.addFunction(new FeaturesFunction());
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this.addFunction(new FeatureFunction()); |
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this.addFunction(new FeatureStoreFunction()); |
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this.addFunction(new IsSelectedFunction()); |
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this.addFunction(new LocalFeaturesFunction()); |
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this.addFunction(new ForeingValueFunction()); |
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} |
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// @SuppressWarnings("OverridableMethodCallInConstructor")
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// public DefaultFeatureSymbolTable(Script userScript, UnmodifiableBasicList<Script> scripts) {
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// this();
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// if (userScript != null) {
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// this.getScripts().add(userScript);
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// }
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// if (scripts != null && !scripts.isEmpty()) {
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// for (Script script : scripts) {
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// this.getScripts().add(script);
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// }
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// }
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// }
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@Override
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public FeatureSymbolTable clone() throws CloneNotSupportedException { |
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DefaultFeatureSymbolTable other = (DefaultFeatureSymbolTable) super.clone();
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return other;
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} |
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@Override
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public boolean exists(String name) { |
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if (type != null && type.get(name) != null) { |
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return true; |
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} |
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return false; |
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} |
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@Override
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public Object value(String name) { |
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if (feature == null) { |
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return null; |
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} |
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if( StringUtils.equalsIgnoreCase(name, this.storeName) ) { |
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return new DynObjectAdapter() { |
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@Override
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public Object getDynValue(String string) throws DynFieldNotFoundException { |
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return feature.get(string);
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} |
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}; |
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} |
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return this.feature.get(name); |
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} |
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@Override
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public boolean isSQLCompatible(String name) { |
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if (this.type == null) { |
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return super.isSQLCompatible(name); |
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} |
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FeatureAttributeDescriptor attrdesc = this.type.getAttributeDescriptor(name);
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if (attrdesc == null) { |
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return true; |
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} |
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if (attrdesc.isComputed()) {
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return false; |
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} |
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return true; |
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} |
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@Override
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public void setFeature(Feature feature) { |
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this.feature = feature;
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if( this.type == null ) { |
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this.type = feature.getType();
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FeatureStore store = feature.getStore(); |
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if( store!=null ) { |
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this.storeName = store.getName();
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} |
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} |
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} |
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@Override
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public MutableSymbolTable createParent() {
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ExpressionEvaluatorManager expManager = ExpressionEvaluatorLocator.getManager(); |
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MutableSymbolTable symbolTable = expManager.createSymbolTable(); |
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symbolTable.addSymbolTable(this);
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return symbolTable;
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} |
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public static void selfRegister() { |
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ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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manager.registerSymbolTable(new DefaultfeatureSymbolTableFactory());
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} |
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} |