Application: gvSIG desktop

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 */

/*

* AUTHORS (In addition to CIT):

* 2009 IVER T.I. S.A.   {{Task}}

*/

/**

 *

 */

package org.gvsig.fmap.dal.feature.testmulithread;

import java.util.ArrayList;

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.EditableFeature;

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

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

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

import org.gvsig.fmap.dal.feature.exception.ConcurrentDataModificationException;

import org.gvsig.tools.evaluator.Evaluator;

import org.gvsig.tools.evaluator.EvaluatorData;

import org.gvsig.tools.evaluator.EvaluatorException;

/**

 * @author jmvivo

 *

 */

public class UpdateFeature extends StoreTask {

        private List updateList = new ArrayList();

        public static final int UPDATE_ALL_FEATURES = -2;

        public static final int UPDATE_LAST_FEATURE = -1;

        /**

         * @param store

         * @param timeToWait

         */

        public UpdateFeature(String id, FeatureStore store) {

                super(id, store);

        }

        /**

         * @param store

         * @param timeToWait

         */

        public UpdateFeature(String id, FeatureStore store, int timeToWait) {

                super(id, store, timeToWait);

        }

        public void addUpdate(int featureToUpdate, String attName, Object newValue) {

                UpdateItem item = new UpdateItem();

                item.featureToUpdate = featureToUpdate;

                item.attributeName = attName;

                item.newValue = newValue;

                item.evaluator = null;

                this.updateList.add(item);

        }

        public void addUpdate(int featureToUpdate, String attName,

                        Evaluator evaluator) {

                UpdateItem item = new UpdateItem();

                item.featureToUpdate = featureToUpdate;

                item.attributeName = attName;

                item.newValue = null;

                item.evaluator = evaluator;

                this.updateList.add(item);

        }

        public Iterator getUpdateList() {

                return this.updateList.iterator();

        }

        public UpdateItem getUpdate(int index) {

                return (UpdateItem) this.updateList.get(index);

        }

        public int getUpdateListSize() {

                return this.updateList.size();

        }

        public EditableFeature applyUpdateList(Feature feature, long index,

                        long lastIndex)

                        throws DataException, EvaluatorException {

                Iterator iter = this.getUpdateList();

                EditableFeature editable = feature.getEditable();

                boolean hasChanges = false;

                while (iter.hasNext()) {

                        UpdateItem update = (UpdateItem) iter.next();

                        if (index == update.featureToUpdate

                                        || update.featureToUpdate == UPDATE_ALL_FEATURES

                                        || (update.featureToUpdate == UPDATE_LAST_FEATURE && (index == lastIndex))) {

                                if (update.evaluator != null) {

                                        editable.set(update.attributeName, update.evaluator

                                                        .evaluate((EvaluatorData) feature));

                                } else {

                                        editable.set(update.attributeName, update.newValue);

                                }

                                hasChanges = true;

                        }

                }

                if (hasChanges) {

                        return editable;

                }

                return null;

        }

        public void run() {

                if (!this.startProcess()) {

                        return;

                }

                if (this.updateList.size() == 0) {

                        finishedNoOk();

                        return;

                }

                FeatureSet set;

                DisposableIterator iter = null;

                try {

                        set = this.store.getFeatureSet();

                } catch (DataException e) {

                        finishedError(e);

                        return;

                }

                try {

                        long size = set.getSize();

                        EditableFeature newFeature = this.store.createNewFeature(true);

                        long i = 0;

                        try {

                                iter = set.iterator();

                                while (iter.hasNext()) {

                                        Feature feature = (Feature) iter.next();

                                        EditableFeature result = this.applyUpdateList(feature,

                                                        i, size - 1);

                                        if (result != null) {

                                                set.update(result);

                                        }

                                        i++;

                                }

                        } catch (ConcurrentDataModificationException e) {

                                finishedConcurrentError(e);

                                return;

                        } catch (DataException e) {

                                finishedError(e);

                                return;

                        }

                        if ((size == set.getSize()) && (set.getSize() == i)) {

                                finishedOk();

                        } else {

                                finishedNoOk();

                        }

                } catch (Throwable e) {

                        finishedError(e);

                        return;

                } finally {

                        iter.dispose();

                        set.dispose();

                }

        }

        public class UpdateItem{

                public long featureToUpdate = UPDATE_ALL_FEATURES;

                public String attributeName = null;

                public Evaluator evaluator = null;

                public Object newValue = null;

        }

}