/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2004-2008, Open Source Geospatial Foundation (OSGeo)
*
* 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;
* version 2.1 of the License.
*
* 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.
*/
package org.geotools.validation.spatial;
import java.util.Map;
import org.geotools.data.collection.ListFeatureCollection;
import org.geotools.data.simple.SimpleFeatureCollection;
import org.geotools.data.simple.SimpleFeatureIterator;
import org.geotools.data.simple.SimpleFeatureSource;
import org.geotools.validation.ValidationResults;
import org.opengis.feature.simple.SimpleFeature;
import com.vividsolutions.jts.geom.Envelope;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.LineString;
import com.vividsolutions.jts.geom.Polygon;
/**
* PointCoveredByLineValidation purpose.
*
* <p>
* Checks to ensure the Line is covered by the Polygon Boundary.
* </p>
*
* @author dzwiers, Refractions Research, Inc.
* @author $Author: dmzwiers $ (last modification)
*
*
* @source $URL$
* @version $Id$
*/
public class LineCoveredByPolygonBoundaryValidation
extends LinePolygonAbstractValidation {
/**
* PointCoveredByLineValidation constructor.
*
* <p>
* Super
* </p>
*/
public LineCoveredByPolygonBoundaryValidation() {
super();
}
/**
* Ensure Line is covered by the Polygon Boundary.
*
* <p></p>
*
* @param layers a HashMap of key="TypeName" value="FeatureSource"
* @param envelope The bounding box of modified features
* @param results Storage for the error and warning messages
*
* @return True if no features intersect. If they do then the validation
* failed.
*
* @throws Exception DOCUMENT ME!
*
* @see org.geotools.validation.IntegrityValidation#validate(java.util.Map,
* com.vividsolutions.jts.geom.Envelope,
* org.geotools.validation.ValidationResults)
*/
public boolean validate(Map layers, Envelope envelope,
ValidationResults results) throws Exception {
boolean r = true;
SimpleFeatureSource fsLine = (SimpleFeatureSource) layers.get(getLineTypeRef());
SimpleFeatureCollection fcLine = fsLine.getFeatures();
SimpleFeatureIterator fLine = fcLine.features();
SimpleFeatureSource fsPoly = (SimpleFeatureSource) layers.get(getRestrictedPolygonTypeRef());
ListFeatureCollection fcPoly = new ListFeatureCollection( fsPoly.getFeatures() );
while(fLine.hasNext()){
SimpleFeature line = fLine.next();
SimpleFeatureIterator fPoly = fcPoly.features();
Geometry lineGeom = (Geometry) line.getDefaultGeometry();
if(envelope.contains(lineGeom.getEnvelopeInternal())){
// check for valid comparison
if(LineString.class.isAssignableFrom(lineGeom.getClass())){
while(fPoly.hasNext()){
SimpleFeature poly = fPoly.next();
Geometry polyGeom = (Geometry) poly.getDefaultGeometry();
if(envelope.contains(polyGeom.getEnvelopeInternal())){
if(Polygon.class.isAssignableFrom(polyGeom.getClass())){
Geometry polyGeomBoundary = polyGeom.getBoundary();
if(!polyGeomBoundary.contains(lineGeom)){
results.error(poly,"Boundary does not contain the specified Line.");
r = false;
}
// do next.
}else{
fcPoly.remove(poly);
results.warning(poly,"Invalid type: this feature is not a derivative of a Polygon");
}
}else{
fcPoly.remove(poly);
}
}
}else{
results.warning(line,"Invalid type: this feature is not a derivative of a LineString");
}
}
}
return r;
}
/**
* The priority level used to schedule this Validation.
*
* @return PRORITY_SIMPLE
*
* @see org.geotools.validation.Validation#getPriority()
*/
public int getPriority() {
return PRIORITY_SIMPLE;
}
}