/**
* Copyright 2006 Webmedia Group Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
package org.araneaframework.uilib.list;
import java.util.Iterator;
import java.util.Map;
import java.util.TreeMap;
import org.apache.log4j.Logger;
public class MultiOrderHelper {
private static final Logger log = Logger.getLogger(MultiOrderHelper.class);
public static OrderInfo getOrderInfo(Map orderInfoMap) {
Map fieldOrders = new TreeMap();
for (Iterator i = orderInfoMap.keySet().iterator(); i.hasNext();) {
String column = (String) i.next();
long value = Long.parseLong(orderInfoMap.get(column).toString());
if (value != 0) {
boolean ascending = value > 0;
Long priority = new Long(Math.abs(value));
if (log.isDebugEnabled()) {
log.debug("Ordered column \"" + column + "\", priority: "
+ priority + ", " + (ascending ? "asc" : "desc"));
}
OrderInfoField orderInfoField = new OrderInfoField(column,
ascending);
fieldOrders.put(priority, orderInfoField);
}
}
OrderInfo orderInfo = new OrderInfo();
for (Iterator i = fieldOrders.values().iterator(); i.hasNext();) {
OrderInfoField orderInfoField = (OrderInfoField) i.next();
if (log.isDebugEnabled()) {
log.debug("Column order \"" + orderInfoField.getId() + "\", "
+ (orderInfoField.isAscending() ? "asc" : "desc"));
}
orderInfo.addField(orderInfoField);
}
return orderInfo;
}
}