001    //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/model/spatialschema/MultiPointImpl.java $
002    /*----------------------------------------------------------------------------
003     This file is part of deegree, http://deegree.org/
004     Copyright (C) 2001-2009 by:
005       Department of Geography, University of Bonn
006     and
007       lat/lon GmbH
008    
009     This library is free software; you can redistribute it and/or modify it under
010     the terms of the GNU Lesser General Public License as published by the Free
011     Software Foundation; either version 2.1 of the License, or (at your option)
012     any later version.
013     This library is distributed in the hope that it will be useful, but WITHOUT
014     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015     FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016     details.
017     You should have received a copy of the GNU Lesser General Public License
018     along with this library; if not, write to the Free Software Foundation, Inc.,
019     59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020    
021     Contact information:
022    
023     lat/lon GmbH
024     Aennchenstr. 19, 53177 Bonn
025     Germany
026     http://lat-lon.de/
027    
028     Department of Geography, University of Bonn
029     Prof. Dr. Klaus Greve
030     Postfach 1147, 53001 Bonn
031     Germany
032     http://www.geographie.uni-bonn.de/deegree/
033    
034     e-mail: info@deegree.org
035    ----------------------------------------------------------------------------*/
036    package org.deegree.model.spatialschema;
037    
038    import java.io.Serializable;
039    
040    import org.deegree.framework.log.ILogger;
041    import org.deegree.framework.log.LoggerFactory;
042    import org.deegree.model.crs.CoordinateSystem;
043    
044    /**
045     * default implementation of the MultiPoint interface of package deegree.model.spatialschema.
046     *
047     * <p>
048     * ------------------------------------------------------------
049     * </p>
050     *
051     * @version 12.6.2001
052     * @author Andreas Poth href="mailto:poth@lat-lon.de"
053     *         <p>
054     */
055    public class MultiPointImpl extends MultiPrimitiveImpl implements MultiPoint, Serializable {
056        /** Use serialVersionUID for interoperability. */
057        private final static long serialVersionUID = -1105623021535230655L;
058    
059        private static final ILogger LOG = LoggerFactory.getLogger( MultiPointImpl.class );
060    
061        /**
062         * Creates a new MultiPointImpl object.
063         *
064         * @param crs
065         */
066        protected MultiPointImpl( CoordinateSystem crs ) {
067            super( crs );
068        }
069    
070        /**
071         * Creates a new MultiPointImpl object.
072         *
073         * @param gmp
074         */
075        protected MultiPointImpl( Point[] gmp ) {
076            super( gmp[0].getCoordinateSystem() );
077    
078            for ( int i = 0; i < gmp.length; i++ ) {
079                aggregate.add( gmp[i] );
080            }
081    
082        }
083    
084        /**
085         * Creates a new MultiPointImpl object.
086         *
087         * @param gmp
088         * @param crs
089         */
090        protected MultiPointImpl( Point[] gmp, CoordinateSystem crs ) {
091            super( crs );
092    
093            for ( int i = 0; i < gmp.length; i++ ) {
094                aggregate.add( gmp[i] );
095            }
096    
097        }
098    
099        /**
100         * adds a Point to the aggregation
101         */
102        public void addPoint( Point gmp ) {
103            super.add( gmp );
104        }
105    
106        /**
107         * inserts a Point into the aggregation. all elements with an index equal or larger index will be moved. if index is
108         * larger then getSize() - 1 or smaller then 0 or gmp equals null an exception will be thrown.
109         *
110         * @param gmp
111         *            Point to insert.
112         * @param index
113         *            position where to insert the new Point
114         */
115        public void insertPointAt( Point gmp, int index )
116                                throws GeometryException {
117            super.insertObjectAt( gmp, index );
118        }
119    
120        /**
121         * sets the submitted Point at the submitted index. the element at the position <code>index</code> will be
122         * removed. if index is larger then getSize() - 1 or smaller then 0 or gmp equals null an exception will be thrown.
123         *
124         * @param gmp
125         *            Point to set.
126         * @param index
127         *            position where to set the new Point
128         */
129        public void setPointAt( Point gmp, int index )
130                                throws GeometryException {
131            setObjectAt( gmp, index );
132        }
133    
134        /**
135         * removes the submitted Point from the aggregation
136         *
137         * @return the removed Point
138         */
139        public Point removePoint( Point gmp ) {
140            return (Point) super.removeObject( gmp );
141        }
142    
143        /**
144         * removes the Point at the submitted index from the aggregation. if index is larger then getSize() - 1 or smaller
145         * then 0 an exception will be thrown.
146         *
147         * @return the removed Point
148         */
149        public Point removePointAt( int index )
150                                throws GeometryException {
151            return (Point) super.removeObjectAt( index );
152        }
153    
154        /**
155         * returns the Point at the submitted index.
156         */
157        public Point getPointAt( int index ) {
158            return (Point) super.getPrimitiveAt( index );
159        }
160    
161        /**
162         * returns all Points as array
163         */
164        public Point[] getAllPoints() {
165            return aggregate.toArray( new Point[getSize()] );
166        }
167    
168        /**
169         * updates the bounding box of the aggregation
170         */
171        private void calculateEnvelope() {
172            Point gmp = getPointAt( 0 );
173    
174            double[] min = gmp.getAsArray().clone();
175            double[] max = min.clone();
176    
177            for ( int i = 1; i < getSize(); i++ ) {
178                double[] pos = getPointAt( i ).getAsArray();
179    
180                for ( int j = 0; j < pos.length; j++ ) {
181                    if ( pos[j] < min[j] ) {
182                        min[j] = pos[j];
183                    } else if ( pos[j] > max[j] ) {
184                        max[j] = pos[j];
185                    }
186                }
187            }
188    
189            envelope = new EnvelopeImpl( new PositionImpl( min ), new PositionImpl( max ), this.crs );
190        }
191    
192        /**
193         * calculates the centroid of the surface
194         */
195        private void calculateCentroid() {
196            try {
197                Point gmp = getPointAt( 0 );
198    
199                double[] cen = new double[gmp.getAsArray().length];
200    
201                for ( int i = 0; i < getSize(); i++ ) {
202                    double[] pos = getPointAt( i ).getAsArray();
203    
204                    for ( int j = 0; j < pos.length; j++ ) {
205                        cen[j] += ( pos[j] / getSize() );
206                    }
207                }
208    
209                centroid = new PointImpl( new PositionImpl( cen ), null );
210            } catch ( Exception ex ) {
211                LOG.logError( "", ex );
212            }
213        }
214    
215        /**
216         * calculates the centroid and envelope of the aggregation
217         */
218        @Override
219        protected void calculateParam() {
220            calculateCentroid();
221            calculateEnvelope();
222            setValid( true );
223        }
224    
225        @Override
226        public int getDimension() {
227            return 0;
228        }
229    
230        @Override
231        public int getCoordinateDimension() {
232            return getPointAt( 0 ).getCoordinateDimension();
233        }
234    
235        @Override
236        public Object clone() {
237            MultiPoint mp = null;
238    
239            try {
240                mp = new MultiPointImpl( getCoordinateSystem() );
241    
242                for ( int i = 0; i < this.getSize(); i++ ) {
243                    PointImpl pi = (PointImpl) getPointAt( i );
244                    mp.add( (Point) pi.clone() );
245                }
246            } catch ( Exception ex ) {
247                LOG.logError( "MultiPoint_Impl.clone: ", ex );
248            }
249    
250            return mp;
251        }
252    }