/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2006-2008, 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.text.cql2;
import org.geotools.filter.text.commons.CompilerUtil;
import org.geotools.filter.text.commons.Language;
import org.junit.Assert;
import org.junit.Test;
import org.opengis.filter.And;
import org.opengis.filter.Filter;
import org.opengis.filter.Or;
import org.opengis.filter.PropertyIsEqualTo;
import org.opengis.filter.PropertyIsLessThan;
import org.opengis.filter.expression.Expression;
import org.opengis.filter.expression.Literal;
import org.opengis.filter.expression.PropertyName;
/**
* Unit Test for Comparison Predicate
* <p>
* By default test executes the test parsing Comparison Predicate using
* the CQL compiler.
* </p>
* <p>
* The subclass could use this as default and add more test cases with different language.
* </p>
*
* @author Mauricio Pazos (Axios Engineering)
* @since 2.5
*
*
* @source $URL$
*/
public class CQLComparisonPredicateTest {
protected final Language language;
public CQLComparisonPredicateTest(){
this(Language.CQL);
}
public CQLComparisonPredicateTest(final Language language){
assert language != null: "language cannot be null value";
this.language = language;
}
/**
* Test Comparison Predicate
* <p>
*
* <pre>
* <comparison predicate > ::=
* <attribute name > <comp op > <literal >
* </pre>
*
* </p>
*/
@Test
public void comparisonOperators() throws Exception {
Filter expected;
Filter actual;
// attr1 < 5
expected = FilterCQLSample.getSample(FilterCQLSample.LESS_FILTER_SAMPLE);
actual = CompilerUtil.parseFilter(this.language, FilterCQLSample.LESS_FILTER_SAMPLE);
Assert.assertNotNull("expects filter not null", actual);
Assert.assertEquals("less than compare filter error", expected, actual);
// attr1 <= 5
expected = FilterCQLSample.getSample(FilterCQLSample.LESS_EQ_FILTER_SAMPLE);
actual = CompilerUtil.parseFilter(this.language, FilterCQLSample.LESS_EQ_FILTER_SAMPLE);
Assert.assertNotNull("expects filter not null", actual);
Assert.assertEquals("less or equal compare filter error", expected, actual);
// attr <> 5
expected = FilterCQLSample.getSample(FilterCQLSample.NOT_EQ_FILTER);
actual = CompilerUtil.parseFilter(this.language, FilterCQLSample.NOT_EQ_FILTER);
Assert.assertNotNull("expects filter not null", actual);
Assert.assertEquals("not equal compare filter error", expected, actual);
}
/**
* Tests attribute names in comparison predicate
* <pre>
* Sample: gmd:aa:bb.gmd:cc.gmd:dd
* </pre>
*
*
* @throws Exception
*/
@Test
public void attributeName()throws Exception{
// "gmd:aa:bb.gmd:cc.gmd:dd"
final String prop = "gmd:aa:bb.gmd:cc.gmd:dd";
final String propExpected = "gmd:aa:bb/gmd:cc/gmd:dd";
Filter actual = CompilerUtil.parseFilter(this.language, prop + " < 100");
Assert.assertTrue("PropertyIsLessThan filter was expected", actual instanceof PropertyIsLessThan);
PropertyIsLessThan lessFilter = (PropertyIsLessThan) actual;
Expression property = lessFilter.getExpression1();
Assert.assertEquals(propExpected, property.toString());
}
/**
* Test comparison Predicate.
* <p>
*
* <pre>
* <comparison predicate > ::=
* <attrsibute name > <comp op > <literal >
* </pre>
*
* </p>
*/
@Test
public void propertyComparisonSimpleExpressions()
throws Exception {
Filter expected;
Filter actual;
expected = FilterCQLSample.getSample(FilterCQLSample.FILTER_SIMPLE_EXPR);
actual = CompilerUtil.parseFilter(this.language, FilterCQLSample.FILTER_SIMPLE_EXPR);
Assert.assertNotNull("expects filter not null", actual);
Assert.assertEquals("not equal compare filter error", expected, actual);
}
/**
* Comparison with boolean values
* @throws Exception
*/
@Test
public void booleanLiteral() throws Exception {
Filter filter;
PropertyIsEqualTo eqFilter;
//test true value
filter = CompilerUtil.parseFilter(this.language, "attr = true");
Assert.assertNotNull(filter);
Assert.assertTrue(filter instanceof PropertyIsEqualTo);
eqFilter = (PropertyIsEqualTo) filter;
Assert.assertEquals("attr", ((PropertyName) eqFilter.getExpression1()).getPropertyName());
Assert.assertEquals(Boolean.TRUE, ((Literal) eqFilter.getExpression2()).getValue());
//test false value
filter = CompilerUtil.parseFilter(this.language, "attr = false");
Assert.assertNotNull(filter);
Assert.assertTrue(filter instanceof PropertyIsEqualTo);
eqFilter = (PropertyIsEqualTo) filter;
Assert.assertEquals("attr", ((PropertyName) eqFilter.getExpression1()).getPropertyName());
Assert.assertEquals(Boolean.FALSE, ((Literal) eqFilter.getExpression2()).getValue());
}
@Test
public void LongLiteral() throws Exception {
Filter filter;
PropertyIsEqualTo eqFilter;
//test true value
final String expectedValue = Long.toString(Long.MAX_VALUE);
filter = CompilerUtil.parseFilter(this.language, "attr = " + expectedValue );
Assert.assertNotNull(filter);
Assert.assertTrue(filter instanceof PropertyIsEqualTo);
eqFilter = (PropertyIsEqualTo) filter;
Assert.assertEquals("attr", ((PropertyName) eqFilter.getExpression1()).getPropertyName());
Assert.assertEquals(Long.parseLong(expectedValue), ((Literal) eqFilter.getExpression2()).getValue());
}
@Test
public void parenRoundtripExpression() throws Exception {
// ATTR1 > ((1 + 2) / 3)
testEqualsExpressions(FilterCQLSample.FILTER_WITH_PAREN_ROUNDTRIP_EXPR);
// "ATTR1 < (1 + ((2 / 3) * 4))"
testEqualsExpressions(FilterCQLSample.FILTER_WITH_NESTED_PAREN_EXPR);
}
@Test
public void bracketRoundtripFilter() throws Exception {
testEqualsExpressions(FilterCQLSample.FILTER_WITH_BRACKET_ROUNDTRIP_EXPR);
Filter f1 = CompilerUtil.parseFilter(this.language,"[[[ X < 4 ] AND NOT [ Y < 4 ]] AND [ Z < 4 ]]");
Assert.assertTrue(f1 instanceof And);
Filter f2 = CompilerUtil.parseFilter(this.language, "[X<4 AND Y<4 ] OR Z<4");
Or orf2 = (Or) f2;
Filter leftf2 = orf2.getChildren().get(0);
Assert.assertTrue(leftf2 instanceof And);
Filter rightf2 = orf2.getChildren().get(1);
Assert.assertTrue(rightf2 instanceof PropertyIsLessThan);
Filter f3 = CompilerUtil.parseFilter(this.language,"[([ X < 4 ] AND NOT [ Y < 4 ]) AND [ Z < 4 ]]");
Assert.assertTrue(f3 instanceof And);
}
/**
* General test for cql expressions
*
* @param cqlSample
* @throws Exception
*/
private void testEqualsExpressions(final String cqlSample)
throws Exception {
Filter expected = FilterCQLSample.getSample(cqlSample);
Filter actual = CompilerUtil.parseFilter(language, cqlSample);
Assert.assertNotNull("expects filter not null", actual);
Assert.assertEquals("this is not the filter expected", expected, actual);
}
}