| gvSIG desktop 1

/*

 * Created on 10-abr-2006

 *

 * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * 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 2

 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

*

* $Id: 

* $Log: 

*/

package org.gvsig.fmap.core;

import java.util.ArrayList;

import java.util.List;

import com.hardcode.gdbms.driver.exceptions.ReadDriverException;

import com.iver.cit.gvsig.fmap.MapContext;

import com.iver.cit.gvsig.fmap.core.IFeature;

import com.iver.cit.gvsig.fmap.core.IGeometry;

import com.iver.cit.gvsig.fmap.drivers.IFeatureIterator;

import com.iver.cit.gvsig.fmap.layers.FLayer;

import com.iver.cit.gvsig.fmap.layers.FLyrVect;

import com.iver.cit.gvsig.fmap.layers.LayersIterator;

import com.iver.cit.gvsig.fmap.spatialindex.INearestNeighbourFinder;

import com.iver.cit.gvsig.fmap.spatialindex.ISpatialIndex;

import com.iver.cit.gvsig.fmap.spatialindex.RTreeJsi;

/**

 * Utility methods to work with FMap layers

 * @author Alvaro Zabala

 *

 */

public class FLyrUtil {

        /**

         * From a given FLyrVect it returns an INearestNeighbourFinder

         * spatial index.

         * 

         * @param lyr

         * @return

         */

        public static INearestNeighbourFinder getNearestNeighbourFinder(FLyrVect lyr) throws ReadDriverException{

                ISpatialIndex spatialIndex = lyr.getISpatialIndex();

                if( spatialIndex instanceof INearestNeighbourFinder){

                        return (INearestNeighbourFinder) spatialIndex;

                }

                RTreeJsi newSptIdx = new RTreeJsi();

                newSptIdx.create();

                IFeatureIterator iterator = lyr.getSource().getFeatureIterator();

                while(iterator.hasNext()){

                        IFeature feature = iterator.next();

                        IGeometry geometry = feature.getGeometry();

                        if(geometry != null)

                                newSptIdx.insert(geometry.getBounds2D(), Integer.parseInt(feature.getID()));

                }

                return newSptIdx;        

        }

        public static  List<FLyrVect> getActiveVectorialLyrs(MapContext mapContext){

                List<FLyrVect> activeVectorialLyrs = new ArrayList<FLyrVect>();

                LayersIterator it = new LayersIterator(mapContext.getLayers());

                while (it.hasNext())

                {

                        FLayer aux = (FLayer) it.next();

                        if (!aux.isActive())

                                continue;

                        if(aux instanceof FLyrVect)

                        {

                                activeVectorialLyrs.add((FLyrVect)aux);

                        }//if

                }//while

                return activeVectorialLyrs;

        }

        public static List<FLyrVect> getVectorialLayers(MapContext mapContext){

                List<FLyrVect> activeVectorialLyrs = new ArrayList<FLyrVect>();

                LayersIterator it = new LayersIterator(mapContext.getLayers());

                while (it.hasNext())

                {

                        FLayer aux = (FLayer) it.next();

                        if(aux instanceof FLyrVect)

                        {

                                activeVectorialLyrs.add((FLyrVect)aux);

                        }//if

                }//while

                return activeVectorialLyrs;

        }

        public static List<FLyrVect> getLayersOfType(MapContext mapContext, int shapeType){

                List<FLyrVect> activeVectorialLyrs = new ArrayList<FLyrVect>();

                LayersIterator it = new LayersIterator(mapContext.getLayers());

                while (it.hasNext())

                {

                        FLayer aux = (FLayer) it.next();

                        if(aux instanceof FLyrVect)

                        {

                                FLyrVect aux2 = (FLyrVect)aux;

                                try {

                                        if(aux2.getShapeType() == shapeType)

                                                activeVectorialLyrs.add((FLyrVect)aux);

                                } catch (ReadDriverException e) {

                                        continue;

                                }

                        }//if

                }//while

                return activeVectorialLyrs;

        }

}