/*---------------- FILE HEADER ------------------------------------------
This file is part of deegree.
Copyright (C) 2001-2006 by:
EXSE, Department of Geography, University of Bonn
http://www.giub.uni-bonn.de/deegree/
lat/lon GmbH
http://www.lat-lon.de
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Contact:
Andreas Poth
lat/lon GmbH
Aennchenstr. 19
53115 Bonn
Germany
E-Mail: poth@lat-lon.de
Prof. Dr. Klaus Greve
Department of Geography
University of Bonn
Meckenheimer Allee 166
53115 Bonn
Germany
E-Mail: greve@giub.uni-bonn.de
---------------------------------------------------------------------------*/
package org.deegree.model.spatialschema;
import java.io.Serializable;
import org.deegree.framework.log.ILogger;
import org.deegree.framework.log.LoggerFactory;
import org.deegree.model.crs.CoordinateSystem;
/**
* default implementation of the LineString interface of
* package jago.model.
*
* ------------------------------------------------------------
* @version 10.6.2001
* @author Andreas Poth
*/
class LineStringImpl extends CurveSegmentImpl implements LineString, Serializable {
/** Use serialVersionUID for interoperability. */
private final static long serialVersionUID = 8093549521711824076L;
private static final ILogger LOG = LoggerFactory.getLogger( LineStringImpl.class );
/**
* Creates a new LineStringImpl object.
*
* @param gmps
* @param cs
*
* @throws GeometryException
*/
public LineStringImpl( Position[] gmps, CoordinateSystem cs )
throws GeometryException {
super( gmps, cs );
}
/**
* returns a shallow copy of the geometry
*/
public Object clone() {
CurveSegment cs = null;
try {
cs = new LineStringImpl( getPositions(), getCoordinateSystem() );
} catch ( Exception ex ) {
LOG.logError( "LineString_Impl.clone: ", ex );
}
return cs;
}
/**
* returns the length of the curve in units of the
* related spatial reference system
*/
public double getLength() {
return -1;
}
/**
* returns a reference to itself
*/
public LineString getAsLineString() throws GeometryException {
return this;
}
/**
* The Boolean valued operation "intersects" shall return TRUE if this Geometry
* intersects another Geometry. Within a Complex, the Primitives do not
* intersect one another. In general, topologically structured data uses shared
* geometric objects to capture intersection information.
*/
public boolean intersects( Geometry gmo ) {
boolean inter = false;
try {
if ( gmo instanceof Point ) {
inter = LinearIntersects.intersects( ( (Point)gmo ).getPosition(), this );
} else if ( gmo instanceof Curve ) {
CurveSegment[] cs = new CurveSegment[] { this };
inter = LinearIntersects.intersects( (Curve)gmo, new CurveImpl( cs ) );
} else if ( gmo instanceof Surface ) {
CurveSegment[] cs = new CurveSegment[] { this };
inter = LinearIntersects.intersects( new CurveImpl( cs ), (Surface)gmo );
} else if ( gmo instanceof MultiPrimitive ) {
inter = intersectsMultiPrimitive( (MultiPrimitive)gmo );
}
} catch ( Exception e ) {
LOG.logError( "", e );
}
return inter;
}
/**
* the operations returns true if the submitted multi primitive intersects
* with the curve segment
*/
private boolean intersectsMultiPrimitive( MultiPrimitive mprim ) throws Exception {
boolean inter = false;
int cnt = mprim.getSize();
for ( int i = 0; i < cnt; i++ ) {
if ( intersects( mprim.getPrimitiveAt( i ) ) ) {
inter = true;
break;
}
}
return inter;
}
/**
* The Boolean valued operation "contains" shall return TRUE if this Geometry
* contains another Geometry.
*/
public boolean contains( Geometry gmo ) {
return false;
}
} /* ********************************************************************
Changes to this class. What the people have been up to:
$Log: LineStringImpl.java,v $
Revision 1.8 2006/07/12 14:46:15 poth
comment footer added
********************************************************************** */