/*
* GeoTools - The Open Source Java GIS Toolkit
* 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.
*
* Created on 07 December 2004, 16:29
*/
package org.geotools.filter;
import org.opengis.filter.expression.ExpressionVisitor;
import org.opengis.filter.expression.Literal;
/**
* This class is actualy a place holder. It resolves to 1.0 but should actualy be substituted for
* a literal that actualy contains the current map scale before use.
* @author James
*
* @source $URL$
*
*/
public class MapScaleDenominatorImpl extends DefaultExpression implements MapScaleDenominator, Literal {
/** Creates a new instance of MapScaleDenominatorImpl */
public MapScaleDenominatorImpl() {
}
public Object evaluate(Object f){
return getValue();
}
public Object getValue() {
return new Double(1);
}
public void setValue(Object constant) {
throw new UnsupportedOperationException();
}
public Object accept(ExpressionVisitor visitor, Object extraData) {
return visitor.visit(this,extraData);
}
public String toString(){
return MapScaleDenominator.EV_NAME;
}
}