| gvSIG desktop 1

/*

 *    GeoTools - OpenSource mapping toolkit

 *    http://geotools.org

 *    (C) 2006, GeoTools Project Managment Committee (PMC)

 *        

 *    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.gvsig.data.vectorial.filter;

import org.opengis.filter.FilterFactory;

import org.opengis.filter.FilterVisitor;

import org.opengis.filter.PropertyIsNotEqualTo;

import org.opengis.filter.expression.Expression;

public class IsNotEqualToImpl extends BinaryComparisonAbstract

        implements PropertyIsNotEqualTo {

        protected IsNotEqualToImpl(Expression e1, Expression e2) {

                this(e1, e2, true );

        }

        protected IsNotEqualToImpl(Expression expression1, Expression expression2, boolean matchCase ) {

                super(expression1, expression2, matchCase);

        }

        //@Override

        public boolean evaluate(Object feature) {

//                Object[] values = eval( feature );

//                Object value1 = values[ 0 ];

//                Object value2 = values[ 1 ];

                final Object value1 = eval(expression1, feature);

        final Object value2 = eval(expression2, feature);

                boolean notEqual = (value1 == null && value2 != null) ||

                        (value1 != null && value2 == null) ||

                    (value1 != null && !value1.equals( value2 ));

                if ( !notEqual ) {

                        return false;

                }

                //not equal, case insensitive?

                if ( !isMatchingCase() && value1 != null && value2 != null ) {

                        //fall back to string and check the case insensitive flag

                        String s1 = (String)value1;

                        String s2 = (String)value2;

                        return !s1.equalsIgnoreCase( s2 );

                }

                return true;

        }

        public Object accept(FilterVisitor visitor, Object extraData) {

                return visitor.visit( this, extraData );

        }

}