/*
 *    GeoTools - The Open Source Java GIS Tookit
 *    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.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.Filter;
import org.opengis.filter.Not;

/**
 * Test boolean value expressions.
 * <p>
 * 
 * <pre>
 *  <boolean value expression > ::=
 *          <boolean term >
 *      |   <boolean value expression > OR  <boolean term >
 *  <boolean term > ::=
 *          <boolean factor >
 *      |   <boolean term > AND  <boolean factor>
 * </pre>
 * 
 * </p>
 * 
 * @author Mauricio Pazos (Axios Engineering)
 * @since 2.6
 *
 *
 * @source $URL$
 */
public class CQLBooleanValueExpressionTest {
    protected final org.geotools.filter.text.commons.Language language;

    public CQLBooleanValueExpressionTest(){
        
        this(Language.CQL);
    }

    public CQLBooleanValueExpressionTest(final Language language){
        
        assert language != null: "language cannot be null value";
        
        this.language = language;
    }

    /**
     * Sample: ATTR1 < 10 AND ATTR2 < 2
     * @throws CQLException 
     */
    @Test 
    public void and() throws CQLException{
        Filter result = CompilerUtil.parseFilter(this.language,FilterCQLSample.FILTER_AND);

        Assert.assertNotNull("filter expected", result);

        Filter expected = FilterCQLSample.getSample(FilterCQLSample.FILTER_AND);

        Assert.assertEquals("ATTR1 < 10 AND ATTR2 < 2 was expected", expected, result);
        
    }

    /**
     * Sample: "ATTR1 > 10 OR ATTR2 < 2"
     * @throws CQLException 
     */
    @Test
    public void or() throws CQLException{
        // "ATTR1 > 10 OR ATTR2 < 2"
        Filter result = CompilerUtil.parseFilter(this.language,FilterCQLSample.FILTER_OR);

        Assert.assertNotNull("filter expected", result);

        Filter expected = FilterCQLSample.getSample(FilterCQLSample.FILTER_OR);

        Assert.assertEquals("ATTR1 > 10 OR ATTR2 < 2 was expected", expected, result);
        
    }

    /**
     * Sample 1: ATTR1 < 10 AND ATTR2 < 2 OR ATTR3 > 10
     * Sample 2: ATTR3 < 4 AND (ATT1 > 10 OR ATT2 < 2)
     * @throws CQLException 
     */
    @Test
    public void andOr() throws CQLException{
        Filter result;
        Filter expected;
        // ATTR1 < 10 AND ATTR2 < 2 OR ATTR3 > 10
        result = CompilerUtil.parseFilter(language, FilterCQLSample.FILTER_OR_AND);

        Assert.assertNotNull("filter expected", result);

        expected = FilterCQLSample.getSample(FilterCQLSample.FILTER_OR_AND);

        Assert.assertEquals("a bad filter was expected", expected, result);

        // ATTR3 < 4 AND (ATT1 > 10 OR ATT2 < 2)
        result = CompilerUtil.parseFilter(language, FilterCQLSample.FILTER_OR_AND_PARENTHESIS);

        Assert.assertNotNull("filter expected", result);

        expected = FilterCQLSample.getSample(FilterCQLSample.FILTER_OR_AND_PARENTHESIS);

        Assert.assertEquals("a bad filter was expected", expected, result);
        
    }

    /**
     * Sample: NOT  ATTR1 < 10
     * @throws Exception
     */
    @Test 
    public void not() throws Exception {

        final String stmt = "NOT " + FilterCQLSample.LESS_FILTER_SAMPLE;
        Filter result = CompilerUtil.parseFilter(language, stmt);

        Assert.assertNotNull("filter expected", result);

        Assert.assertTrue( result instanceof Not);

        Not notFilter = (Not)result;
        
        Filter actual = notFilter.getFilter();
        
        Filter expected = FilterCQLSample.getSample(FilterCQLSample.LESS_FILTER_SAMPLE);

        Assert.assertEquals(FilterCQLSample.LESS_FILTER_SAMPLE + "was expected", expected, actual);
    }
    
    /**
     * <pre>
     * Sample: 
     * ATTR3 < 4 AND (NOT( ATTR1 < 10 AND ATTR2 < 2))
     * ATTR1 < 1 AND (NOT (ATTR2 < 2)) AND ATTR3 < 3
     * </pre>
     * @throws Exception
     */
    @Test
    public void andNot() throws Exception {
        Filter result;
        Filter expected;

        // ATTR3 < 4 AND (NOT( ATTR1 < 10 AND ATTR2 < 2))
        result = CompilerUtil.parseFilter(language,
                FilterCQLSample.FILTER_AND_NOT_AND);

        Assert.assertNotNull("filter expected", result);

        expected = FilterCQLSample
                .getSample(FilterCQLSample.FILTER_AND_NOT_AND);

        Assert.assertEquals("a bad filter was produced", expected, result);

        // "ATTR1 < 1 AND (NOT (ATTR2 < 2)) AND ATTR3 < 3"
        result = CompilerUtil.parseFilter(language,
                FilterCQLSample.FILTER_AND_NOT_COMPARASION);

        Assert.assertNotNull("filter expected", result);

        expected = FilterCQLSample
                .getSample(FilterCQLSample.FILTER_AND_NOT_COMPARASION);

        Assert.assertEquals("a bad filter was produced", expected, result);
    }
     


}