Application: gvSIG desktop

package org.gvsig.data.datastores.vectorial.file.shp_inst;

import java.util.ArrayList;

import java.util.Iterator;

import org.apache.log4j.Logger;

import org.gvsig.data.CloseException;

import org.gvsig.data.DataCollection;

import org.gvsig.data.DataStoreParameters;

import org.gvsig.data.InitializeException;

import org.gvsig.data.OpenException;

import org.gvsig.data.ReadException;

import org.gvsig.data.datastores.vectorial.file.shp.SHPStore;

import org.gvsig.data.vectorial.Feature;

import org.gvsig.data.vectorial.FeatureType;

/**

 * This data store creates an array of fully instantiated features when it is opened. Should be by far the fastest

 * and the most memory-consuming

 *  

 * @author jldominguez

 *

 */

public class InstSHPStore extends SHPStore {

        private static Logger logger = Logger.getLogger(InstSHPStore.class);

        public static String DATASTORE_NAME = "InstSHPStore";

        static {

                InstSHPRegister.selfRegister();

        }

        private Feature[] features;

        private int theSize = 0;

        public void init(DataStoreParameters p) throws InitializeException {

                super.init(p);

                theSize = dbf.getRecordCount();

        }

        public void doOpen() throws OpenException {

                super.doOpen();

                // ----------------- get all features: ----------------------

                features = new Feature[theSize];

                try {

                        for (int i=0; i<theSize; i++)

                                features[i] = super.getFeatureByPosition(featureType, (long) i);         

                } catch (ReadException ex) {

                        logger.error("While getting all features: " + ex.getMessage());

                }

                logger.debug("Created array in memory with: " + theSize + " features.");

                // ------------------------

                try {

                        super.doClose();

                } catch (CloseException e) {

                        logger.error("While closing after loading: " + e.getMessage());

                        throw new OpenException("hile closing after loading.", e);

                }

        }

        protected Feature getFeatureByPosition(FeatureType featureType,

                        long position) throws ReadException {

                return features[(int) position];

        }

        protected long getFeatureCount() {

                return theSize;

        }

}