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.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.fmap.geom.primitive.Envelope;

import org.gvsig.tools.evaluator.AbstractEvaluator;

import org.gvsig.tools.evaluator.EvaluatorData;

import org.gvsig.tools.evaluator.EvaluatorException;

public class IntersectsEnvelopeEvaluator extends AbstractEvaluator {

        private Envelope envelope;

        private String geomName;

        private String envelopeWKT = null;

        private Envelope envelopeTrans;

        private boolean isDefault;

        private String srs;

        public IntersectsEnvelopeEvaluator(Envelope envelope,

                        IProjection envelopeProjection, FeatureType featureType,

                        String geomName) {

                FeatureAttributeDescriptor fad = (FeatureAttributeDescriptor) featureType

                                .get(geomName);

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

                                geomName);

                this.envelope = envelope;

                // this.srs = envelopeProjection.getAbrev();

                // this.projection=CRSFactory.getCRS(fad.getSRS());

                // this.envelopeProjection=envelopeProjection;

//                ICoordTrans ct = null;

//                if (!this.srs.equals(fad.getSRS())) { // FIXME comparaci?n

//                        ct = envelopeProjection.getCT(fad.getSRS());

//                }

//                if (ct != null) {

//                        this.envelopeTrans = envelope.convert(ct);

//                } else {

                        this.envelopeTrans = envelope;

//                }

                this.geomName = geomName;

                this.srs = envelopeProjection.getAbrev();

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

        }

        public Object evaluate(EvaluatorData data) throws EvaluatorException {

                Envelope featureEnvelope;

                if (isDefault) {

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

                                        .getDefaultEnvelope();

                } else {

                        featureEnvelope = ((Geometry) data.getDataValue(geomName)).getEnvelope();

                }

                return new Boolean(envelopeTrans.intersects(featureEnvelope));

        }

        public String getName() {

                return "intersects envelope";

        }

        public String getSQL() {

                if (envelopeWKT == null) {

                        try {

                                envelopeWKT = (String) envelope.getGeometry().convertToWKT();

                        } catch (GeometryOperationNotSupportedException e) {

                                throw new DataEvaluatorRuntimeException(e);

                        } catch (GeometryOperationException e) {

                                throw new DataEvaluatorRuntimeException(e);

                        }

                }

                return " ST_intersects(ST_GeomFromText('" + envelopeWKT + "', '" + srs

                                + "'), ST_envelope(" + geomName + ")) ";

        }

}