/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2005-2008, 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.filter.visitor;
import junit.framework.TestCase;
import org.geotools.factory.CommonFactoryFinder;
import org.geotools.factory.GeoTools;
import org.geotools.filter.IllegalFilterException;
import org.opengis.filter.And;
import org.opengis.filter.Filter;
import org.opengis.filter.Not;
import org.opengis.filter.PropertyIsGreaterThan;
import org.opengis.filter.PropertyIsLessThan;
import org.opengis.filter.PropertyIsLike;
import org.opengis.filter.expression.Add;
import org.opengis.filter.expression.Expression;
import org.opengis.filter.expression.Literal;
import org.opengis.filter.expression.PropertyName;
import org.opengis.filter.spatial.BBOX;
import org.xml.sax.helpers.NamespaceSupport;
/**
* Unit test for DuplicatorFilterVisitor.
*
* @author Cory Horner, Refractions Research Inc.
*
*
* @source $URL$
*/
public class DuplicateFilterVisitorTest extends TestCase {
private org.opengis.filter.FilterFactory2 fac;
public DuplicateFilterVisitorTest(String testName) {
super(testName);
}
protected void setUp() throws Exception {
fac = CommonFactoryFinder.getFilterFactory2(GeoTools.getDefaultHints());
}
public void testLogicFilterDuplication() throws IllegalFilterException {
//create a filter
PropertyIsGreaterThan greater = fac.greater(fac.literal(2), fac.literal(1));
PropertyIsLessThan less = fac.less(fac.literal(3), fac.literal(4));
And and = fac.and(greater, less);
//duplicate it
DuplicatingFilterVisitor visitor = new DuplicatingFilterVisitor();
Filter newFilter = (Filter) and.accept(visitor, fac);
//compare it
assertNotNull(newFilter);
assertEquals( and, newFilter );
}
public void testOptimizationExample(){
Expression add = fac.add(fac.literal(1), fac.literal(2));
class Optimization extends DuplicatingFilterVisitor {
public Object visit( Add expression, Object extraData ) {
Expression expr1 = expression.getExpression1();
Expression expr2 = expression.getExpression2();
if( expr1 instanceof Literal && expr2 instanceof Literal){
Double number1 = (Double) expr1.evaluate(null,Double.class);
Double number2 = (Double) expr2.evaluate(null,Double.class);
return ff.literal( number1.doubleValue() + number2.doubleValue() );
}
return super.visit(expression, extraData);
}
};
Expression modified = (Expression) add.accept( new Optimization(), null );
assertTrue( modified instanceof Literal );
}
public void testNotFilter() {
// set GEOT-1566
PropertyIsLike like = fac.like(fac.property("stringProperty"), "ab*");
Not not = fac.not(like);
DuplicatingFilterVisitor visitor = new DuplicatingFilterVisitor(fac);
Not clone = (Not) not.accept(visitor, null);
assertEquals(not, clone);
assertNotSame(not, clone);
assertNotSame(like, clone.getFilter());
}
public void testPreservedNamespaceContext() {
// set GEOT-3756
NamespaceSupport nsContext = new NamespaceSupport();
nsContext.declarePrefix("f", "http://feature.example.org");
Expression geometry = fac.property("f:name", nsContext);
BBOX bbox = fac.bbox(geometry, 0, 0, 1, 1, "EPSG:4326");
DuplicatingFilterVisitor visitor = new DuplicatingFilterVisitor(fac);
BBOX clone = (BBOX) bbox.accept(visitor, null);
assertEquals(bbox, clone);
assertNotSame(bbox, clone);
assertSame(nsContext, ((PropertyName) clone.getExpression1()).getNamespaceContext());
}
}