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.dal.feature.impl.featureset;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Iterator;

import java.util.List;

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

import org.gvsig.tools.dispose.DisposableIterator;

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

import org.gvsig.fmap.dal.feature.impl.DefaultFeature;

import org.gvsig.fmap.dal.feature.spi.FeatureProvider;

import org.gvsig.tools.exception.BaseException;

public class FastOrderedIterator extends DefaultIterator {

        DefaultFeature myFeature;

        protected Feature lastFeature = null;

        FastOrderedIterator(DefaultFeatureSet featureSet, Iterator iterator, long index) {

                super(featureSet);

                try {

                        this.initializeFeature();

                        if (featureSet.orderedData == null) {

                                // FIXME QUE PASA CON SIZE > Integer.MAX_VALUE ?????

                                List data = new ArrayList();

                                Object item;

                                while (iterator.hasNext()) {

                                        item = iterator.next();

                                        if (item instanceof DefaultFeature){

                                                data.add(((DefaultFeature) item).getData().getCopy());

                                        } else {

                                                data.add(((FeatureProvider)item).getCopy());

                                        }

                                }

                                Collections.sort(data, new FeatureProviderComparator(featureSet.store,

                                                featureSet.query.getOrder()));

                                featureSet.orderedData = data;

                        }

                        if (index < Integer.MAX_VALUE) {

                                this.iterator = featureSet.orderedData.listIterator((int) index);

                        } else {

                                this.iterator = featureSet.orderedData.iterator();

                                this.skypto(index);

                        }

                }

                finally {                        

                        if (iterator instanceof DisposableIterator) {

                                ((DisposableIterator) iterator).dispose();

                        }

                }

        }

        public FastOrderedIterator(DefaultFeatureSet featureSet, long index) {

                super(featureSet);

                this.initializeFeature();

                if (index < Integer.MAX_VALUE) {

                        this.iterator = featureSet.orderedData.listIterator((int) index);

                } else {

                        this.iterator = featureSet.orderedData.iterator();

                        this.skypto(index);

                }

        }

        protected DefaultFeature createFeature(FeatureProvider fData) {

                fData.setNew(false);

                this.myFeature.setData(fData);

                return this.myFeature;

        }

        protected void initializeFeature() {

                myFeature = new DefaultFeature(fset.store);

        }

        public Object next() {

                lastFeature = null;

                lastFeature = (Feature) super.next();

                return lastFeature;

        }

        public void remove() {

                if (!fset.store.isEditing()) {

                        throw new UnsupportedOperationException();

                }

                if (this.lastFeature == null) {

                        throw new IllegalStateException();

                }

                try {

                        fset.store.delete(this.lastFeature);

                } catch (DataException e) {

                        // FIXME Cambiar excepcion a una Runtime de DAL

                        throw new RuntimeException(e);

                }

                this.iterator.remove();

                this.initializeFeature();

        }

        protected void doDispose() throws BaseException {

                super.doDispose();

                myFeature = null;

                lastFeature = null;

        }

}