/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)
*
* 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.
*
* For further information about Alkacon Software GmbH, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* 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
*/
package org.opencms.workplace.list;
import java.text.Collator;
import java.util.Comparator;
import java.util.Locale;
/**
* Default comparator for case sensitive column sorting with string localization.<p>
*
* If both list items column values are Strings then a localized collector is used for sorting;
* if not, the <code>{@link Comparable}</code> interface is used.<p>
*
* @since 6.0.0
*
* @see org.opencms.workplace.list.CmsListColumnDefinition
*/
public class CmsListItemNumericalComparator implements I_CmsListItemComparator {
/**
* Default Constructor.<p>
*/
public CmsListItemNumericalComparator() {
// no-op
}
/**
* @see org.opencms.workplace.list.I_CmsListItemComparator#getComparator(java.lang.String, java.util.Locale)
*/
public Comparator getComparator(final String columnId, final Locale locale) {
final Collator collator = Collator.getInstance(locale);
return new Comparator() {
/**
* @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
*/
public int compare(Object o1, Object o2) {
Comparable c1 = (Comparable)((CmsListItem)o1).get(columnId);
Comparable c2 = (Comparable)((CmsListItem)o2).get(columnId);
if ((c1 instanceof String) && (c2 instanceof String)) {
return collator.compare(c1, c2);
} else if (c1 != null) {
if (c2 == null) {
return 1;
}
return c1.compareTo(c2);
} else if (c2 != null) {
return -1;
}
return 0;
}
};
}
}