| gvSIG desktop 1

/* 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 {gvSIG}  {{Task}}

 */

package org.gvsig.rastertools.roi;

import java.util.ArrayList;

import java.util.Collections;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Iterator;

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

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

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

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

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.mapcontext.layers.vectorial.GraphicLayer;

import org.gvsig.fmap.mapcontext.rendering.symbols.ISymbol;

import org.gvsig.raster.grid.roi.ROI;

/**

 * Manages a table of ROI with its related list of Features.

 * 

 * @author <a href="mailto:cordinyana@gvsig.org">C?sar Ordi?ana</a>

 */

public class ROIFeatureManager {

        private Map<String, List<FeatureReference>> roiNameToFeatureList = Collections

                        .synchronizedMap(new HashMap<String, List<FeatureReference>>());

        private final Object lock = new Object();

        private final String layerId;

        public ROIFeatureManager(String layerId) {

                this.layerId = layerId;

        }

        /**

         * Returns a read-only {@link Map} of ROI names to {@link FeatureReference}

         * {@link List} objects.

         * 

         * @return the roiNameToFeatureList the table of {@link FeatureReference}

         *         objects per {@link ROI}.

         */

        public Map<String, List<FeatureReference>> getRoiNameToFeatureList() {

                return Collections.unmodifiableMap(roiNameToFeatureList);

        }

        public EditableFeature addROIFeature(ROI roi, GraphicLayer graphicLayer,

                        Geometry geometry, ISymbol symbol) throws DataException {

                int symbolPos = graphicLayer.addSymbol(symbol);

                EditableFeature feature = createEditableFeature(graphicLayer

                                .getFeatureStore(), roi, geometry, symbolPos);

                addROIFeature(roi, feature.getReference());

                return feature;

        }

        public void addROIFeature(ROI roi, FeatureReference feature) {

                List<FeatureReference> featureList = roiNameToFeatureList.get(roi

                                .getName());

                synchronized (lock) {

                        if (featureList == null) {

                                featureList = new ArrayList<FeatureReference>();

                                roiNameToFeatureList.put(roi.getName(), featureList);

                        }

                }

                featureList.add(feature);

        }

        public boolean clear(GraphicLayer layer) {

                return clear(layer, false);

        }

        public void clearFeaturesFromGraphicLayer(GraphicLayer layer) {

                clear(layer, true);

        }

        private boolean clear(GraphicLayer layer, boolean onlyRemoveFromLayer) {

                boolean anythingCleared = false;

                for (Iterator<String> iterator = roiNameToFeatureList.keySet()

                                .iterator(); iterator.hasNext();) {

                        String roiName = iterator.next();

                        anythingCleared = anythingCleared

                                        || removeROI(roiName, layer, onlyRemoveFromLayer);

                }

                return anythingCleared;

        }

        public boolean removeROI(String roiName, GraphicLayer layer) {

                return removeROI(roiName, layer, false);

        }

        private boolean removeROI(String roiName, GraphicLayer layer,

                        boolean onlyRemoveFromLayer) {

                String roiId = getROIId(roiName);

                layer.removeGraphics(roiId);

                return onlyRemoveFromLayer ? true : roiNameToFeatureList

                                .remove(roiName) != null;

        }

        public String getROIId(String roiName) {

                return layerId.concat("-").concat(roiName);

        }

        public void changeROIName(String oldName, String newName, GraphicLayer layer)

                        throws DataException {

                List<FeatureReference> featureList = roiNameToFeatureList

                                .remove(oldName);

                if (featureList != null) {

                        roiNameToFeatureList.put(newName, featureList);

                        String newroiid = getROIId(newName);

                        FeatureStore store = layer.getFeatureStore();

                        store.edit();

                        for (int i = 0; i < featureList.size(); i++) {

                                FeatureReference ref = featureList.get(i);

                                EditableFeature editable = ref.getFeature().getEditable();

                                editable.set(GraphicLayer.FEATURE_ATTR_ID, newroiid);

                                store.update(editable);

                        }

                        store.finishEditing();

                }

        }

        public List<FeatureReference> getROIFeatures(String roiName) {

                return Collections.unmodifiableList(roiNameToFeatureList.get(roiName));

        }

        private EditableFeature createEditableFeature(FeatureStore store, ROI roi,

                        Geometry geometry, int symbolPos) throws DataException {

                EditableFeature feature = store.createNewFeature();

                feature.set(GraphicLayer.FEATURE_ATTR_ID, getROIId(roi.getName()));

                feature.setGeometry(GraphicLayer.FEATURE_ATTR_GEOMETRY, geometry);

                feature.setInt(GraphicLayer.FEATURE_ATTR_IDSYMBOL, symbolPos);

                return feature;

        }

}