Application: gvSIG desktop

package org.gvsig.expressionevaluator.impl.converterstocode;

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.FeatureAttributeDescriptor;

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

/**

 *

 * @author jjdelcerro

 */

public class FeatureToCode implements ConverterToCode {

    @Override

    public String getName() {

        return "Feature";

    }

    @Override

    public boolean isApplicable(Object... os) {

        return os[0] instanceof Feature;

    }

    @Override

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

        Feature f = (Feature) obj;

        FeatureType ftype = f.getType();

        if( ftype.size() == 1 ) {

            return builder.constant(f.get(0));

        } else {

            ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getExpressionEvaluatorManager();

            MutableCodes args = builder.args();

            for (FeatureAttributeDescriptor desc : ftype) {

                args.add(manager.convertToCode(builder, f.get(desc.getName()), props));

            }

            return builder.tuple(args);

        }

    }

    public static void selfRegister() {

        ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getExpressionEvaluatorManager();

        manager.registerCodeConverter(new FeatureToCode());

    }

}