Application: gvSIG desktop

package org.gvsig.expressionevaluator.impl.converterstocode;

import java.util.Iterator;

import java.util.Map;

import org.gvsig.expressionevaluator.Code;

import org.gvsig.expressionevaluator.CodeBuilder;

import org.gvsig.expressionevaluator.ConverterToCode;

import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator;

import org.gvsig.expressionevaluator.ExpressionEvaluatorManager;

import org.gvsig.expressionevaluator.MutableCodes;

import org.gvsig.fmap.dal.feature.Feature;

import org.gvsig.fmap.dal.feature.impl.DefaultFeatureReferenceSelection;

import org.gvsig.fmap.dal.feature.impl.DefaultFeatureSelection;

import org.gvsig.fmap.dal.feature.impl.featurereference.FeatureReferenceIteratorToFeatureIterator;

/**

 *

 * @author jjdelcerro

 */

public class FeatureSelectionToCode implements ConverterToCode {

    @Override

    public String getName() {

        return "FeatureSelection";

    }

    @Override

    public boolean isApplicable(Object... os) {

        return os[0] instanceof DefaultFeatureSelection;

    }

    @Override

    public Code toCode(CodeBuilder builder, Object obj, Map props) {

        DefaultFeatureSelection selection = (DefaultFeatureSelection)obj;

        ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getExpressionEvaluatorManager();

        ConverterToCode featureToCode = manager.getConverterToCodeByName("Feature");

        Iterator<Feature> it = new FeatureReferenceIteratorToFeatureIterator(

                selection.getFeatureStore(), 

                selection.referenceIterator()

        );

        MutableCodes args = builder.args();

        while( it.hasNext() ) {

            args.add(featureToCode.toCode(builder, it.next(), props));

        }

        return builder.tuple(args);

    }

    public static void selfRegister() {

        ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getExpressionEvaluatorManager();

        manager.registerCodeConverter(new FeatureSelectionToCode());

    }

}