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

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

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

import org.gvsig.tools.dispose.DisposeUtils;

import org.gvsig.tools.exception.BaseException;

public class FastDefaultIterator extends DefaultIterator {

        DefaultFeature myFeature;

        public FastDefaultIterator(DefaultFeatureSet featureSet, long index, long elements)

                        throws DataException {

                super(featureSet);

                try{

                    this.initializeFeature();

                    if (index > 0 || elements>0 ) {

                            if (featureSet.provider.canIterateFromIndex()) {

                                    try {

                                            this.iterator = featureSet.provider.fastIterator(index,elements);

                                    } catch (UnsupportedOperationException e) {

                                            this.iterator = featureSet.provider.fastIterator();

                                            skypto(index);

                                    }

                            } else {

                                    this.iterator = featureSet.provider.fastIterator();

                                    skypto(index);

                            }

                    } else {

                            this.iterator = featureSet.provider.fastIterator();

                    }

                } catch (Throwable t) {

                    DisposeUtils.dispose(this.fset);

                    DisposeUtils.dispose(this);

                    throw t;

                }

        }

        protected DefaultFeature createFeature(FeatureProvider fData)

                        throws DataException {

                fData.setNew(false);

                this.myFeature.setData(fData);

                if (this.fset.transform.isEmpty()) {

                        return myFeature;

                } else {

                        return (DefaultFeature) this.fset.transform.applyTransform(

                                        myFeature, fset

                                                        .getDefaultFeatureType());

                }

        }

        protected void initializeFeature() {

                myFeature = new DefaultFeature(fset.store);

        }

        public void remove() {

                super.remove();

                this.initializeFeature();

        }

        protected void doDispose() throws BaseException {

                super.doDispose();

                myFeature = null;

        }

}