Revision 44259 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
| DefaultFeatureSymbolTable.java | ||
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package org.gvsig.fmap.dal.impl.expressionevaluator; |
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import org.apache.commons.lang3.Range; |
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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.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 static org.gvsig.fmap.dal.impl.expressionevaluator.DALSymbolTable.FUNCTION_FEATURES; |
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import org.gvsig.fmap.dal.impl.expressionevaluator.DALSymbolTable.FeaturesFunction; |
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import org.gvsig.tools.dynobject.Tags; |
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import org.gvsig.tools.script.Script; |
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import org.gvsig.tools.util.UnmodifiableBasicList; |
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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_FOREING_VALUE = "FOREING_VALUE"; |
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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" |
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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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String fullFieldName = getStr(args, 0); |
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String[] nameParts = fullFieldName.split("[.]");
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Feature currentFeature = feature; |
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try {
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String namePart; |
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Object value; |
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for (int i = 0; i < nameParts.length-1; i++) {
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namePart = nameParts[i]; |
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value = currentFeature.get(namePart); |
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FeatureAttributeDescriptor attrdesc = currentFeature.getType().getAttributeDescriptor(namePart); |
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Tags tags = attrdesc.getTags(); |
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String storeName = tags.getString(DataManager.DAL_FOREING_TABLE, null); |
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String attrName = tags.getString(DataManager.DAL_FOREING_CODE, null); |
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StoresRepository repository = currentFeature.getStore().getStoresRepository(); |
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FeatureStore store = (FeatureStore) repository.get(storeName); |
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currentFeature = store.findFirst( |
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builder.eq( |
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builder.constant(value), |
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builder.variable(attrName) |
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).toString() |
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); |
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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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namePart = nameParts[nameParts.length-1]; |
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value = currentFeature.get(namePart); |
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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_FEATURES + "' 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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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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if (feature != null) {
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store = feature.getStore(); |
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store = store.getChild(storeName); |
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store = store.getChildren().get(storeName);
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} |
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if( store == null ) {
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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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if (repository.containsKey(storeName)) {
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store = repository.get(storeName); |
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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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if (feature == null) {
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return null; |
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} |
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return feature.getStore(); |
| ... | ... | |
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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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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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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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| ... | ... | |
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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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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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@Override |
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public Object value(String name) {
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if( feature==null ) {
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if (feature == null) {
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return null; |
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} |
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return this.feature.get(name); |
| ... | ... | |
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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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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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if (attrdesc == null) {
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return true; |
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} |
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if( attrdesc.isComputed() ) {
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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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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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