001: /*
002: * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI
003: * for visualizing and manipulating spatial features with geometry and attributes.
004: *
005: * Copyright (C) 2003 Vivid Solutions
006: *
007: * This program is free software; you can redistribute it and/or
008: * modify it under the terms of the GNU General Public License
009: * as published by the Free Software Foundation; either version 2
010: * of the License, or (at your option) any later version.
011: *
012: * This program is distributed in the hope that it will be useful,
013: * but WITHOUT ANY WARRANTY; without even the implied warranty of
014: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
015: * GNU General Public License for more details.
016: *
017: * You should have received a copy of the GNU General Public License
018: * along with this program; if not, write to the Free Software
019: * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
020: *
021: * For more information, contact:
022: *
023: * Vivid Solutions
024: * Suite #1A
025: * 2328 Government Street
026: * Victoria BC V8T 5G5
027: * Canada
028: *
029: * (250)385-6040
030: * www.vividsolutions.com
031: */
032:
033: package com.vividsolutions.jump.workbench.ui.plugin;
034:
035: import java.util.ArrayList;
036: import java.util.Collection;
037: import java.util.Iterator;
038:
039: import com.vividsolutions.jts.geom.Geometry;
040: import com.vividsolutions.jts.geom.GeometryCollection;
041: import com.vividsolutions.jts.geom.GeometryFactory;
042: import com.vividsolutions.jts.geom.LineString;
043: import com.vividsolutions.jts.geom.MultiLineString;
044: import com.vividsolutions.jts.geom.MultiPoint;
045: import com.vividsolutions.jts.geom.MultiPolygon;
046: import com.vividsolutions.jts.geom.Point;
047: import com.vividsolutions.jts.geom.Polygon;
048: import com.vividsolutions.jump.feature.Feature;
049: import com.vividsolutions.jump.feature.FeatureUtil;
050: import com.vividsolutions.jump.workbench.WorkbenchContext;
051: import com.vividsolutions.jump.workbench.model.Layer;
052: import com.vividsolutions.jump.workbench.model.UndoableCommand;
053: import com.vividsolutions.jump.workbench.plugin.AbstractPlugIn;
054: import com.vividsolutions.jump.workbench.plugin.EnableCheckFactory;
055: import com.vividsolutions.jump.workbench.plugin.MultiEnableCheck;
056: import com.vividsolutions.jump.workbench.plugin.PlugInContext;
057:
058: public class CombineSelectedFeaturesPlugIn extends AbstractPlugIn {
059: public boolean execute(final PlugInContext context)
060: throws Exception {
061: final ArrayList originalFeatures = new ArrayList(context
062: .getLayerViewPanel().getSelectionManager()
063: .getFeaturesWithSelectedItems());
064: final Feature combinedFeature = combine(originalFeatures);
065: final Layer layer = (Layer) context.getLayerViewPanel()
066: .getSelectionManager().getLayersWithSelectedItems()
067: .iterator().next();
068: execute(new UndoableCommand(getName()) {
069: public void execute() {
070: layer.getFeatureCollectionWrapper().removeAll(
071: originalFeatures);
072: layer.getFeatureCollectionWrapper()
073: .add(combinedFeature);
074: }
075:
076: public void unexecute() {
077: layer.getFeatureCollectionWrapper().remove(
078: combinedFeature);
079: layer.getFeatureCollectionWrapper().addAll(
080: originalFeatures);
081: }
082: }, context);
083: //Select outside #execute so it's not done on a redo. [Jon Aquino]
084: context.getLayerViewPanel().getSelectionManager()
085: .getFeatureSelection().selectItems(layer,
086: combinedFeature);
087: return true;
088: }
089:
090: private Feature combine(Collection originalFeatures) {
091: GeometryFactory factory = new GeometryFactory();
092: Feature feature = (Feature) ((Feature) originalFeatures
093: .iterator().next()).clone();
094: Class narrowestCollectionClass = narrowestCollectionClass(originalFeatures);
095: if (narrowestCollectionClass == MultiPoint.class) {
096: feature
097: .setGeometry(factory
098: .createMultiPoint((Point[]) FeatureUtil
099: .toGeometries(originalFeatures)
100: .toArray(
101: new Point[originalFeatures
102: .size()])));
103: } else if (narrowestCollectionClass == MultiLineString.class) {
104: feature.setGeometry(factory
105: .createMultiLineString((LineString[]) FeatureUtil
106: .toGeometries(originalFeatures).toArray(
107: new LineString[originalFeatures
108: .size()])));
109: } else if (narrowestCollectionClass == MultiPolygon.class) {
110: feature
111: .setGeometry(factory
112: .createMultiPolygon((Polygon[]) FeatureUtil
113: .toGeometries(originalFeatures)
114: .toArray(
115: new Polygon[originalFeatures
116: .size()])));
117: } else {
118: feature.setGeometry(factory
119: .createGeometryCollection((Geometry[]) FeatureUtil
120: .toGeometries(originalFeatures).toArray(
121: new Geometry[originalFeatures
122: .size()])));
123: }
124: return feature;
125: }
126:
127: public MultiEnableCheck createEnableCheck(
128: WorkbenchContext workbenchContext) {
129: EnableCheckFactory checkFactory = new EnableCheckFactory(
130: workbenchContext);
131: return new MultiEnableCheck()
132: .add(
133: checkFactory
134: .createWindowWithLayerViewPanelMustBeActiveCheck())
135: .add(
136: checkFactory
137: .createExactlyNLayersMustHaveSelectedItemsCheck(1))
138: .add(
139: checkFactory
140: .createAtLeastNFeaturesMustHaveSelectedItemsCheck(2))
141: .add(
142: checkFactory
143: .createSelectedItemsLayersMustBeEditableCheck());
144: }
145:
146: private Class narrowestCollectionClass(Collection features) {
147: boolean hasPoints = false;
148: boolean hasLineStrings = false;
149: boolean hasPolygons = false;
150: for (Iterator i = features.iterator(); i.hasNext();) {
151: Feature feature = (Feature) i.next();
152: if (feature.getGeometry() instanceof Point) {
153: hasPoints = true;
154: } else if (feature.getGeometry() instanceof LineString) {
155: hasLineStrings = true;
156: } else if (feature.getGeometry() instanceof Polygon) {
157: hasPolygons = true;
158: } else {
159: return GeometryCollection.class;
160: }
161: }
162: if (hasPoints && !hasLineStrings && !hasPolygons) {
163: return MultiPoint.class;
164: }
165: if (!hasPoints && hasLineStrings && !hasPolygons) {
166: return MultiLineString.class;
167: }
168: if (!hasPoints && !hasLineStrings && hasPolygons) {
169: return MultiPolygon.class;
170: }
171: return GeometryCollection.class;
172: }
173: }
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