Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 3

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

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

import org.cresques.cts.ICoordTrans;

import org.cresques.cts.IProjection;

import org.gvsig.fmap.dal.exception.DataEvaluatorRuntimeException;

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.GeometryOperationException;

import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException;

import org.gvsig.tools.evaluator.AbstractEvaluator;

import org.gvsig.tools.evaluator.EvaluatorData;

import org.gvsig.tools.evaluator.EvaluatorException;

/**

 *

 * @author Vicente Caballero Navarro

 *

 */

public class DisjointGeometryEvaluator extends AbstractEvaluator {

        private String geomName;

        private Geometry geometry;

        private Geometry geometryTrans;

        private String srs;

        private boolean isDefault;

        private String geometryWKT;

        public DisjointGeometryEvaluator(Geometry geometry,

                        IProjection projection,

                        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 = projection.getAbrev();

                IProjection fad_proj = fad.getSRS();

                ICoordTrans ct = null;

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

                    ct = projection.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 {

                        Geometry geom = null;

                        if (isDefault) {

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

                                geom = feature.getDefaultGeometry();

                        } else {

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

                        }

                        return new Boolean(geometryTrans.disjoint(geom));

                } catch (Exception e) {

                        throw new EvaluatorException(e);

                }

        }

        public String getName() {

                return "disjoint with geometry";

        }

        public String getSQL() {

                if (geometryWKT == null) {

                        try {

                                geometryWKT = geometry.convertToWKT();

                        } catch (GeometryOperationNotSupportedException e) {

                                throw new DataEvaluatorRuntimeException(e);

                        } catch (GeometryOperationException e) {

                                throw new DataEvaluatorRuntimeException(e);

                        }

                }

                return " ST_disjoint(ST_GeomFromText('" + geometryWKT + "', " + "'"

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

        }

}