001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/tags/2.1/src/org/deegree/ogcbase/IndexStep.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2007 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/deegree/
008 lat/lon GmbH
009 http://www.lat-lon.de
010
011 This library is free software; you can redistribute it and/or
012 modify it under the terms of the GNU Lesser General Public
013 License as published by the Free Software Foundation; either
014 version 2.1 of the License, or (at your option) any later version.
015
016 This library is distributed in the hope that it will be useful,
017 but WITHOUT ANY WARRANTY; without even the implied warranty of
018 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
019 Lesser General Public License for more details.
020
021 You should have received a copy of the GNU Lesser General Public
022 License along with this library; if not, write to the Free Software
023 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024
025 Contact:
026
027 Andreas Poth
028 lat/lon GmbH
029 Aennchenstraße 19
030 53177 Bonn
031 Germany
032 E-Mail: poth@lat-lon.de
033
034 Prof. Dr. Klaus Greve
035 Department of Geography
036 University of Bonn
037 Meckenheimer Allee 166
038 53115 Bonn
039 Germany
040 E-Mail: greve@giub.uni-bonn.de
041
042 ---------------------------------------------------------------------------*/
043 package org.deegree.ogcbase;
044
045 import org.deegree.datatypes.QualifiedName;
046
047 /**
048 * {@link PropertyPathStep} implementation that selects a specified occurence of an element (using
049 * the element name as property name).
050 *
051 * @author <a href="mailto:schneider@lat-lon.de">Markus Schneider </a>
052 * @author last edited by: $Author: apoth $
053 *
054 * @version $Revision: 6834 $, $Date: 2007-05-05 11:01:02 +0200 (Sa, 05 Mai 2007) $
055 *
056 * @see PropertyPathStep
057 */
058 public class IndexStep extends PropertyPathStep {
059
060 private int selectedIndex;
061
062 /**
063 * Creates a new instance of <code>IndexStep</code> that selects the specified occurence of
064 * the element with the given name.
065 *
066 * @param elementName
067 * @param selectedIndex
068 */
069 IndexStep( QualifiedName elementName, int selectedIndex ) {
070 super( elementName );
071 this.selectedIndex = selectedIndex;
072 }
073
074 /**
075 * Returns the index of the selected element.
076 *
077 * @return the index of the selected element
078 */
079 public int getSelectedIndex() {
080 return this.selectedIndex;
081 }
082
083 @Override
084 public int hashCode() {
085 return this.selectedIndex + this.propertyName.hashCode();
086 }
087
088 @Override
089 public boolean equals( Object obj ) {
090 if ( !( obj instanceof IndexStep ) ) {
091 return false;
092 }
093 IndexStep that = (IndexStep) obj;
094 return this.getSelectedIndex() == that.getSelectedIndex() && this.propertyName.equals( that.propertyName );
095 }
096
097 @Override
098 public String toString() {
099 return this.propertyName.getPrefixedName() + "[" + this.selectedIndex + "]";
100 }
101 }