/*
* Copyright (C) 2010 Teleal GmbH, Switzerland
*
* This program 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 3 of
* the License, or (at your option) any later version.
*
* This program 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 program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.teleal.cling.support.model;
import java.util.ArrayList;
import java.util.List;
/**
* @author Christian Bauer
*/
public class SortCriterion {
final protected boolean ascending;
final protected String propertyName;
public SortCriterion(boolean ascending, String propertyName) {
this.ascending = ascending;
this.propertyName = propertyName;
}
public SortCriterion(String criterion) {
this(criterion.startsWith("+"), criterion.substring(1));
if (!(criterion.startsWith("-") || criterion.startsWith("+")))
throw new IllegalArgumentException("Missing sort prefix +/- on criterion: " + criterion);
}
public boolean isAscending() {
return ascending;
}
public String getPropertyName() {
return propertyName;
}
public static SortCriterion[] valueOf(String s) {
if (s == null || s.length() == 0) return new SortCriterion[0];
List<SortCriterion> list = new ArrayList();
String[] criteria = s.split(",");
for (String criterion : criteria) {
list.add(new SortCriterion(criterion.trim()));
}
return list.toArray(new SortCriterion[list.size()]);
}
public static String toString(SortCriterion[] criteria) {
if (criteria == null) return "";
StringBuilder sb = new StringBuilder();
for (SortCriterion sortCriterion : criteria) {
sb.append(sortCriterion.toString()).append(",");
}
if (sb.toString().endsWith(",")) sb.deleteCharAt(sb.length()-1);
return sb.toString();
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(ascending ? "+" : "-");
sb.append(propertyName);
return sb.toString();
}
}