001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/model/spatialschema/LineStringImpl.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 org.deegree.framework.log.ILogger;
039 import org.deegree.framework.log.LoggerFactory;
040 import org.deegree.framework.util.GeometryUtils;
041 import org.deegree.model.crs.CoordinateSystem;
042
043 /**
044 * default implementation of the LineString interface of package deegree.model.spatialschema.
045 *
046 *
047 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
048 * @author last edited by: $Author: mschneider $
049 *
050 * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
051 */
052 public class LineStringImpl extends CurveSegmentImpl implements LineString {
053 /** Use serialVersionUID for interoperability. */
054 private final static long serialVersionUID = 8093549521711824076L;
055
056 private static final ILogger LOG = LoggerFactory.getLogger( LineStringImpl.class );
057
058 private double length = -1;
059
060 /**
061 * Creates a new LineStringImpl object.
062 *
063 * @param gmps
064 * @param cs
065 *
066 * @throws GeometryException
067 */
068 protected LineStringImpl( Position[] gmps, CoordinateSystem cs ) throws GeometryException {
069 super( gmps, cs );
070 }
071
072 @Override
073 public Object clone() {
074 CurveSegment cs = null;
075
076 Position[] tmp = new Position[points.length];
077 for ( int i = 0; i < tmp.length; i++ ) {
078 tmp[i] = new PositionImpl( points[i].getX(), points[i].getY(), points[i].getZ() );
079 }
080
081 try {
082 cs = new LineStringImpl( tmp, getCoordinateSystem() );
083 } catch ( Exception ex ) {
084 LOG.logError( "LineString_Impl.clone: ", ex );
085 }
086
087 return cs;
088 }
089
090 private void calcLength() {
091 double d = 0;
092 for ( int i = 0; i < points.length - 1; i++ ) {
093 d += GeometryUtils.distance( points[i], points[i + 1] );
094 }
095 length = d;
096 }
097
098 /**
099 * @return length of the curve in units of the related spatial reference system
100 */
101 public double getLength() {
102 if ( length < 0 ) {
103 calcLength();
104 }
105 return length;
106 }
107
108 /**
109 * returns a reference to itself
110 */
111 public LineString getAsLineString()
112 throws GeometryException {
113 return this;
114 }
115
116 /**
117 * The Boolean valued operation "intersects" shall return TRUE if this Geometry intersects another Geometry. Within
118 * a Complex, the Primitives do not intersect one another. In general, topologically structured data uses shared
119 * geometric objects to capture intersection information.
120 */
121 public boolean intersects( Geometry gmo ) {
122 boolean inter = false;
123
124 try {
125 if ( gmo instanceof Point ) {
126 double tolerance = ( (Point) gmo ).getTolerance();
127 inter = LinearIntersects.intersects( ( (Point) gmo ).getPosition(), this, tolerance );
128 } else if ( gmo instanceof Curve ) {
129 CurveSegment[] cs = new CurveSegment[] { this };
130 inter = LinearIntersects.intersects( (Curve) gmo, new CurveImpl( cs ) );
131 } else if ( gmo instanceof Surface ) {
132 CurveSegment[] cs = new CurveSegment[] { this };
133 inter = LinearIntersects.intersects( new CurveImpl( cs ), (Surface) gmo );
134 } else if ( gmo instanceof MultiPrimitive ) {
135 inter = intersectsMultiPrimitive( (MultiPrimitive) gmo );
136 }
137 } catch ( Exception e ) {
138 LOG.logError( "", e );
139 }
140
141 return inter;
142 }
143
144 /**
145 * the operations returns true if the submitted multi primitive intersects with the curve segment
146 */
147 private boolean intersectsMultiPrimitive( MultiPrimitive mprim )
148 throws Exception {
149 boolean inter = false;
150
151 int cnt = mprim.getSize();
152
153 for ( int i = 0; i < cnt; i++ ) {
154 if ( intersects( mprim.getPrimitiveAt( i ) ) ) {
155 inter = true;
156 break;
157 }
158 }
159
160 return inter;
161 }
162
163 @Override
164 public boolean contains( Geometry gmo ) {
165 return false;
166 }
167 }