Application: gvSIG desktop

package org.gvsig.fmap.mapcontext.layers.vectorial;

import org.cresques.cts.ICoordTrans;

import org.cresques.cts.IProjection;

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

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

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

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.operation.relationship.DefaultRelationshipGeometryOperationContext;

import org.gvsig.fmap.geom.operation.relationship.Touches;

import org.gvsig.tools.evaluator.AbstractEvaluator;

import org.gvsig.tools.evaluator.EvaluatorData;

import org.gvsig.tools.evaluator.EvaluatorException;

/**

 *

 * @author Vicente Caballero Navarro

 *

 */

public class TouchesGeometryEvaluator extends AbstractEvaluator {

        private String geomName;

        private Geometry geometry;

        private Geometry geometryTrans;

        private String srs;

        private boolean isDefault;

        public TouchesGeometryEvaluator(Geometry geometry,

                        IProjection envelopeProjection, FeatureType featureType,

                        String geomName) {

                FeatureAttributeDescriptor fad = (FeatureAttributeDescriptor) featureType

                                .get(geomName);

                this.isDefault = featureType.getDefaultGeometryAttributeName().equals(

                                geomName);

                this.geometry = geometry;

                this.geometryTrans = geometry.cloneGeometry();

                this.srs = envelopeProjection.getAbrev();

                IProjection fad_proj = fad.getSRS();

                ICoordTrans ct = null;

                if (fad_proj != null && !fad_proj.equals(envelopeProjection)) {

                    ct = envelopeProjection.getCT(fad_proj);

                }

                if (ct != null) {

                        geometryTrans.reProject(ct);

                }

                this.geomName = geomName;

                this.getFieldsInfo().addMatchFieldValue(geomName, geometryTrans);

        }

        public Object evaluate(EvaluatorData data) throws EvaluatorException {

                try {

                        DefaultRelationshipGeometryOperationContext context;

                        if (isDefault) {

                                Feature feature = (Feature) data.getContextValue("feature");

                                context =new DefaultRelationshipGeometryOperationContext(feature

                                                .getDefaultGeometry());

                        } else {

                                Geometry geom = (Geometry) data.getDataValue(geomName);

                                context = new DefaultRelationshipGeometryOperationContext(geom);

                        }

                        return geometryTrans.invokeOperation(Touches.CODE, context);

                } catch (Exception e) {

                        throw new EvaluatorException(e);

                }

        }

        public String getName() {

                return "touches with geometry";

        }

        public String getSQL() {

                return " touches(GeomFromText('" + geometry.toString() + "', " + "'"

                                + srs + "'" + "), " + geomName + ") ";

        }

}