01: //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/trunk/src/org/deegree/model/filterencoding/FalseFilter.java $
02: /*---------------- FILE HEADER ------------------------------------------
03:
04: This file is part of deegree.
05: Copyright (C) 2001-2008 by:
06: EXSE, Department of Geography, University of Bonn
07: http://www.giub.uni-bonn.de/deegree/
08: lat/lon GmbH
09: http://www.lat-lon.de
10:
11: This library is free software; you can redistribute it and/or
12: modify it under the terms of the GNU Lesser General Public
13: License as published by the Free Software Foundation; either
14: version 2.1 of the License, or (at your option) any later version.
15:
16: This library is distributed in the hope that it will be useful,
17: but WITHOUT ANY WARRANTY; without even the implied warranty of
18: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19: Lesser General Public License for more details.
20:
21: You should have received a copy of the GNU Lesser General Public
22: License along with this library; if not, write to the Free Software
23: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24:
25: Contact:
26:
27: Andreas Poth
28: lat/lon GmbH
29: Aennchenstr. 19
30: 53115 Bonn
31: Germany
32: E-Mail: poth@lat-lon.de
33:
34: Prof. Dr. Klaus Greve
35: Department of Geography
36: University of Bonn
37: Meckenheimer Allee 166
38: 53115 Bonn
39: Germany
40: E-Mail: greve@giub.uni-bonn.de
41:
42:
43: ---------------------------------------------------------------------------*/
44: package org.deegree.model.filterencoding;
45:
46: import org.deegree.model.feature.Feature;
47:
48: /**
49: * Abstract superclass representing <Filter> elements (as defined in the Filter DTD). A <Filter>
50: * element either consists of (one or more) FeatureId-elements or one operation-element. This is
51: * reflected in the two implementations FeatureFilter and ComplexFilter.
52: * <p>
53: *
54: * @author Markus Schneider
55: * @version $Revision: 9343 $
56: */
57: public class FalseFilter implements Filter {
58:
59: /**
60: * Calculates the <tt>Filter</tt>'s logical value (false).
61: * <p>
62: *
63: * @param feature
64: * (in this special case irrelevant)
65: * @return false (always)
66: */
67: public boolean evaluate(Feature feature) {
68: return false;
69: }
70:
71: /** Produces an indented XML representation of this object. */
72: public StringBuffer toXML() {
73: StringBuffer sb = new StringBuffer();
74: sb
75: .append("<ogc:Filter xmlns:ogc='http://www.opengis.net/ogc'>");
76: sb.append("<False/>");
77: sb.append("</ogc:Filter>\n");
78: return sb;
79: }
80: }
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