/*---------------- FILE HEADER ------------------------------------------
This file is part of deegree.
Copyright (C) 2001-2006 by:
EXSE, Department of Geography, University of Bonn
http://www.giub.uni-bonn.de/deegree/
lat/lon GmbH
http://www.lat-lon.de
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; either
version 2.1 of the License, or (at your option) any later version.
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.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Contact:
Andreas Poth
lat/lon GmbH
Aennchenstr. 19
53115 Bonn
Germany
E-Mail: poth@lat-lon.de
Prof. Dr. Klaus Greve
Department of Geography
University of Bonn
Meckenheimer Allee 166
53115 Bonn
Germany
E-Mail: greve@giub.uni-bonn.de
---------------------------------------------------------------------------*/
package org.deegree.model.filterencoding;
import org.deegree.model.feature.Feature;
/**
* Abstract superclass representing <Filter> elements (as defined in the Filter DTD).
* A <Filter> element either consists of (one or more) FeatureId-elements or
* one operation-element. This is reflected in the two implementations FeatureFilter
* and ComplexFilter.
* <p>
* @author Markus Schneider
* @version $Revision: 1.5 $
*/
public class FalseFilter implements Filter {
/**
* Calculates the <tt>Filter</tt>'s logical value (false).
* <p>
* @param feature (in this special case irrelevant)
* @return false (always)
*/
public boolean evaluate (Feature feature) {
return false;
}
/** Produces an indented XML representation of this object. */
public StringBuffer toXML () {
StringBuffer sb = new StringBuffer ();
sb.append ("<ogc:Filter xmlns:ogc='http://www.opengis.net/ogc'>");
sb.append ("<False/>");
sb.append ("</ogc:Filter>\n");
return sb;
}
}
/* ********************************************************************
Changes to this class. What the people have been up to:
$Log: FalseFilter.java,v $
Revision 1.5 2006/07/12 14:46:14 poth
comment footer added
********************************************************************** */