/*
* 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;
import org.geotools.util.Converters;
import org.opengis.filter.FilterVisitor;
import org.opengis.filter.PropertyIsNotEqualTo;
import org.opengis.filter.expression.Expression;
public class IsNotEqualToImpl extends CompareFilterImpl
implements PropertyIsNotEqualTo {
protected IsNotEqualToImpl(org.opengis.filter.FilterFactory factory) {
this(factory,null,null);
}
protected IsNotEqualToImpl(org.opengis.filter.FilterFactory factory, Expression e1, Expression e2) {
this( factory, e1, e2, true );
}
protected IsNotEqualToImpl(org.opengis.filter.FilterFactory factory, Expression expression1, Expression expression2, boolean matchCase ) {
super(factory, expression1, expression2, matchCase);
//backwards compat with old type system
this.filterType = COMPARE_NOT_EQUALS;
}
//@Override
public boolean evaluate(Object feature) {
Object[] values = eval( feature );
Object value1 = values[ 0 ];
Object value2 = values[ 1 ];
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 = Converters.convert(value1, String.class );
String s2 = Converters.convert(value2, String.class );
return !s1.equalsIgnoreCase( s2 );
}
return true;
}
public Object accept(FilterVisitor visitor, Object extraData) {
return visitor.visit( this, extraData );
}
}