Source Code Cross Referenced for EditGeom.java in  » GIS » udig-1.1 » net » refractions » udig » tools » edit » support » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » udig 1.1 » net.refractions.udig.tools.edit.support 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* uDig - User Friendly Desktop Internet GIS client
002:         * http://udig.refractions.net
003:         * (C) 2004, Refractions Research Inc.
004:         *
005:         * This library is free software; you can redistribute it and/or
006:         * modify it under the terms of the GNU Lesser General Public
007:         * License as published by the Free Software Foundation;
008:         * version 2.1 of the License.
009:         *
010:         * This library is distributed in the hope that it will be useful,
011:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
012:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013:         * Lesser General Public License for more details.
014:         */
015:        package net.refractions.udig.tools.edit.support;
016:
017:        import java.util.ArrayList;
018:        import java.util.Collections;
019:        import java.util.Iterator;
020:        import java.util.List;
021:        import java.util.concurrent.atomic.AtomicReference;
022:
023:        import com.vividsolutions.jts.geom.Envelope;
024:
025:        import net.refractions.udig.tools.edit.EditPlugin;
026:
027:        /**
028:         * Models a geometry as required by the PixelCoordMap.
029:         * 
030:         * @author jones
031:         * @since 1.1.0
032:         */
033:        public class EditGeom implements  Iterable<PrimitiveShape> {
034:
035:            private final PrimitiveShape shell;
036:            private final List<PrimitiveShape> holes = Collections
037:                    .synchronizedList(new ArrayList<PrimitiveShape>());
038:            EditBlackboard owner;
039:            private final AtomicReference<ShapeType> shapeType = new AtomicReference<ShapeType>();
040:            {
041:                shapeType.set(ShapeType.UNKNOWN);
042:            }
043:            private final AtomicReference<String> featureID = new AtomicReference<String>();
044:            private AtomicReference<Boolean> changed = new AtomicReference<Boolean>();
045:            boolean initializing;
046:
047:            /**
048:             * The latest up-to-date bounds of the feature in datastore.
049:             */
050:            private Envelope featureBBox = null;
051:
052:            /**
053:             * It is recommended to use constructor with bounds.
054:             * 
055:             * @param owner
056:             * @param featureId2
057:             */
058:            public EditGeom(EditBlackboard owner, String featureId2) {
059:                this .owner = owner;
060:                shell = new PrimitiveShape(this );
061:                this .featureID.set(featureId2);
062:                changed.set(false);
063:            }
064:
065:            /**
066:             * 
067:             * 
068:             * @param owner
069:             * @param featureId
070:             * @param featureBounds
071:             */
072:            public EditGeom(EditBlackboard owner, String featureId,
073:                    Envelope featureBounds) {
074:                this .owner = owner;
075:                shell = new PrimitiveShape(this );
076:                this .featureID.set(featureId);
077:                changed.set(false);
078:                this .featureBBox = featureBounds;
079:            }
080:
081:            public EditGeom(EditGeom geom) {
082:                shell = new PrimitiveShape(geom.getShell());
083:                for (PrimitiveShape hole : geom.getHoles()) {
084:                    holes.add(new PrimitiveShape(hole));
085:                }
086:                owner = geom.owner;
087:            }
088:
089:            public PrimitiveShape getShell() {
090:                return shell;
091:            }
092:
093:            /**
094:             * User is expected to add holes as needed.
095:             * 
096:             * @return
097:             */
098:            public List<PrimitiveShape> getHoles() {
099:                return holes;
100:            }
101:
102:            @Override
103:            public String toString() {
104:                StringBuffer buffer = new StringBuffer();
105:                buffer.append(featureID.get());
106:                buffer.append(" "); //$NON-NLS-1$
107:                buffer.append(shapeType);
108:                buffer.append(" "); //$NON-NLS-1$
109:                buffer.append(shell.toString());
110:                buffer.append("{"); //$NON-NLS-1$        
111:                for (int i = 0, numHoles = this .holes.size(); i < numHoles; i++) {
112:                    buffer.append(holes.get(i).toString());
113:                }
114:                buffer.append("}"); //$NON-NLS-1$
115:                return buffer.toString();
116:            }
117:
118:            public PrimitiveShape newHole() {
119:                PrimitiveShape hole = new PrimitiveShape(this );
120:                holes.add(hole);
121:                return hole;
122:            }
123:
124:            /**
125:             * @return Returns the featureID.
126:             */
127:            public AtomicReference<String> getFeatureIDRef() {
128:                return featureID;
129:            }
130:
131:            /**
132:             * @return Returns the shape type.
133:             */
134:            public ShapeType getShapeType() {
135:                return shapeType.get();
136:            }
137:
138:            /**
139:             * This is a thread-safe method
140:             * 
141:             * @param type The new shape type.
142:             */
143:            public void setShapeType(ShapeType shapeType) {
144:                this .shapeType.set(shapeType);
145:            }
146:
147:            public Iterator<PrimitiveShape> iterator() {
148:                return new Iterator<PrimitiveShape>() {
149:
150:                    boolean shellAccessed = false;
151:                    Iterator<PrimitiveShape> holeIter = holes.iterator();
152:
153:                    public boolean hasNext() {
154:                        return !shellAccessed || holeIter.hasNext();
155:                    }
156:
157:                    public PrimitiveShape next() {
158:                        if (!shellAccessed) {
159:                            shellAccessed = true;
160:                            return shell;
161:                        }
162:
163:                        return holeIter.next();
164:                    }
165:
166:                    public void remove() {
167:                        throw new UnsupportedOperationException(
168:                                "Remove not allowed"); //$NON-NLS-1$
169:                    }
170:
171:                };
172:            }
173:
174:            /**
175:             * @return Returns the owner.
176:             */
177:            public EditBlackboard getEditBlackboard() {
178:                return owner;
179:            }
180:
181:            /**
182:             * Returns an old bounding box of the feature whose geometry is wrapped by EditGeom
183:             * before any editing.
184:             * 
185:             * @return 
186:             *      Returns an old bounding box of the feature
187:             */
188:            public Envelope getFeatureEnvelope() {
189:                return featureBBox;
190:            }
191:
192:            /**
193:             * Indicates that this geometry has been modified since it has been in the blackboard.
194:             * 
195:             * @return true if the geometry has been modified while on the blackboard.
196:             */
197:            public boolean isChanged() {
198:                return changed.get();
199:            }
200:
201:            /**
202:             * This method signals the in-memory state of EditGeom with respect to the actual
203:             * feature in datastore.
204:             * <p>
205:             *  <li><code>true</code> value means that the geometry is changed but not up-to-date
206:             *  with datastore's feature geometry.
207:             *  <li><code>false</code> value means that the geometry is up-to-date
208:             *  with datastore's feature geometry.
209:             * 
210:             * 
211:             * 
212:             * @param changed
213:             */
214:            public void setChanged(boolean changed) {
215:                if (this .changed.get() && !changed) {
216:                    synchronized (owner) {
217:                        Envelope envelope = new Envelope();
218:                        for (int i = 0; i < shell.getNumCoords(); i++) {
219:                            envelope.expandToInclude(shell.getCoord(i));
220:                        }
221:                        featureBBox = envelope;
222:                    }
223:                }
224:
225:                this .changed.set(changed);
226:
227:            }
228:
229:            public Selection createSelection() {
230:                return new EditGeomSelection(this );
231:            }
232:
233:            public void assertValid() {
234:                if (!EditPlugin.isDebugging(EditPlugin.RUN_ASSERTIONS))
235:                    return;
236:                for (PrimitiveShape shape : this ) {
237:                    shape.assertValid();
238:                }
239:            }
240:
241:            public boolean hasVertex(Point point) {
242:                if (shapeType.get() == ShapeType.POLYGON) {
243:                    for (PrimitiveShape shape : this ) {
244:                        if (shape.hasVertex(point))
245:                            return true;
246:                    }
247:                    return false;
248:                } else {
249:                    return shell.hasVertex(point);
250:                }
251:            }
252:
253:            /**
254:             * gets the closest edge in the geometry to the point.  
255:             *
256:             * @param point reference point
257:             * @param treatUnknownAsPolygon declares whether to treat geometries of type UNKNOWN as a polygon 
258:             * @return
259:             */
260:            public ClosestEdge getClosestEdge(Point point,
261:                    boolean treatUnknownAsPolygon) {
262:                assert shapeType.get() != ShapeType.POINT;
263:                ClosestEdge closest = shell.getClosestEdge(point,
264:                        treatUnknownAsPolygon);
265:                if (shapeType.get() == ShapeType.POLYGON
266:                        || (shapeType.get() == ShapeType.UNKNOWN && treatUnknownAsPolygon)) {
267:
268:                    if (shell.contains(point, treatUnknownAsPolygon)) {
269:                        for (PrimitiveShape shape : holes) {
270:                            ClosestEdge current = shape.getClosestEdge(point,
271:                                    treatUnknownAsPolygon);
272:                            if (closest == null)
273:                                closest = current;
274:                            else if (current != null
275:                                    && current.distanceToEdge < closest.distanceToEdge)
276:                                closest = current;
277:                        }
278:                    }
279:                }
280:                return closest;
281:            }
282:
283:            public Point overVertex(Point point, int radius) {
284:                for (PrimitiveShape shape : this ) {
285:                    Point p = shape.overVertex(point, radius);
286:                    if (p != null)
287:                        return p;
288:                }
289:                return null;
290:            }
291:
292:        }
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