/*
* The Unified Mapping Platform (JUMP) is an extensible, interactive GUI
* for visualizing and manipulating spatial features with geometry and attributes.
*
* Copyright (C) 2003 Vivid Solutions
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* For more information, contact:
*
* Vivid Solutions
* Suite #1A
* 2328 Government Street
* Victoria BC V8T 5G5
* Canada
*
* (250)385-6040
* www.vividsolutions.com
*/
package com.vividsolutions.jump.workbench.ui.plugin;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryCollection;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.LineString;
import com.vividsolutions.jts.geom.MultiLineString;
import com.vividsolutions.jts.geom.MultiPoint;
import com.vividsolutions.jts.geom.MultiPolygon;
import com.vividsolutions.jts.geom.Point;
import com.vividsolutions.jts.geom.Polygon;
import com.vividsolutions.jump.feature.Feature;
import com.vividsolutions.jump.feature.FeatureUtil;
import com.vividsolutions.jump.workbench.WorkbenchContext;
import com.vividsolutions.jump.workbench.model.Layer;
import com.vividsolutions.jump.workbench.model.UndoableCommand;
import com.vividsolutions.jump.workbench.plugin.AbstractPlugIn;
import com.vividsolutions.jump.workbench.plugin.EnableCheckFactory;
import com.vividsolutions.jump.workbench.plugin.MultiEnableCheck;
import com.vividsolutions.jump.workbench.plugin.PlugInContext;
public class CombineSelectedFeaturesPlugIn extends AbstractPlugIn {
public boolean execute(final PlugInContext context) throws Exception {
final ArrayList originalFeatures =
new ArrayList(
context.getLayerViewPanel().getSelectionManager().getFeaturesWithSelectedItems());
final Feature combinedFeature = combine(originalFeatures);
final Layer layer =
(Layer) context
.getLayerViewPanel()
.getSelectionManager()
.getLayersWithSelectedItems()
.iterator()
.next();
execute(new UndoableCommand(getName()) {
public void execute() {
layer.getFeatureCollectionWrapper().removeAll(originalFeatures);
layer.getFeatureCollectionWrapper().add(combinedFeature);
}
public void unexecute() {
layer.getFeatureCollectionWrapper().remove(combinedFeature);
layer.getFeatureCollectionWrapper().addAll(originalFeatures);
}
}, context);
//Select outside #execute so it's not done on a redo. [Jon Aquino]
context.getLayerViewPanel().getSelectionManager().getFeatureSelection().selectItems(
layer,
combinedFeature);
return true;
}
private Feature combine(Collection originalFeatures) {
GeometryFactory factory = new GeometryFactory();
Feature feature = (Feature) ((Feature) originalFeatures.iterator().next()).clone();
Class narrowestCollectionClass = narrowestCollectionClass(originalFeatures);
if (narrowestCollectionClass == MultiPoint.class) {
feature.setGeometry(
factory.createMultiPoint(
(Point[]) FeatureUtil.toGeometries(originalFeatures).toArray(
new Point[originalFeatures.size()])));
} else if (narrowestCollectionClass == MultiLineString.class) {
feature.setGeometry(
factory.createMultiLineString(
(LineString[]) FeatureUtil.toGeometries(originalFeatures).toArray(
new LineString[originalFeatures.size()])));
} else if (narrowestCollectionClass == MultiPolygon.class) {
feature.setGeometry(
factory.createMultiPolygon(
(Polygon[]) FeatureUtil.toGeometries(originalFeatures).toArray(
new Polygon[originalFeatures.size()])));
} else {
feature.setGeometry(
factory.createGeometryCollection(
(Geometry[]) FeatureUtil.toGeometries(originalFeatures).toArray(
new Geometry[originalFeatures.size()])));
}
return feature;
}
public MultiEnableCheck createEnableCheck(WorkbenchContext workbenchContext) {
EnableCheckFactory checkFactory = new EnableCheckFactory(workbenchContext);
return new MultiEnableCheck()
.add(checkFactory.createWindowWithLayerViewPanelMustBeActiveCheck())
.add(checkFactory.createExactlyNLayersMustHaveSelectedItemsCheck(1))
.add(checkFactory.createAtLeastNFeaturesMustHaveSelectedItemsCheck(2))
.add(checkFactory.createSelectedItemsLayersMustBeEditableCheck());
}
private Class narrowestCollectionClass(Collection features) {
boolean hasPoints = false;
boolean hasLineStrings = false;
boolean hasPolygons = false;
for (Iterator i = features.iterator(); i.hasNext();) {
Feature feature = (Feature) i.next();
if (feature.getGeometry() instanceof Point) {
hasPoints = true;
} else if (feature.getGeometry() instanceof LineString) {
hasLineStrings = true;
} else if (feature.getGeometry() instanceof Polygon) {
hasPolygons = true;
} else {
return GeometryCollection.class;
}
}
if (hasPoints && !hasLineStrings && !hasPolygons) {
return MultiPoint.class;
}
if (!hasPoints && hasLineStrings && !hasPolygons) {
return MultiLineString.class;
}
if (!hasPoints && !hasLineStrings && hasPolygons) {
return MultiPolygon.class;
}
return GeometryCollection.class;
}
}