/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.wicket.extensions.markup.html.repeater.util;
import org.apache.wicket.extensions.markup.html.repeater.data.sort.ISortState;
import org.apache.wicket.extensions.markup.html.repeater.data.sort.SortOrder;
import org.apache.wicket.util.io.IClusterable;
import org.apache.wicket.util.lang.Args;
/**
* Implementation of ISortState that can keep track of sort information for a single property.
*
* @author Igor Vaynberg (ivaynberg)
* @param <T>
* the type of the sort property
*
*/
public class SingleSortState<T> implements ISortState<T>, IClusterable
{
private static final long serialVersionUID = 1L;
SortParam<T> param;
@Override
public void setPropertySortOrder(final T property, final SortOrder order)
{
Args.notNull(property, "property");
Args.notNull(order, "order");
if (order == SortOrder.NONE)
{
if ((param != null) && property.equals(param.getProperty()))
{
param = null;
}
}
else
{
param = new SortParam<>(property, order == SortOrder.ASCENDING);
}
}
@Override
public SortOrder getPropertySortOrder(final T property)
{
Args.notNull(property, "property");
if ((param == null) || (param.getProperty().equals(property) == false))
{
return SortOrder.NONE;
}
return param.isAscending() ? SortOrder.ASCENDING : SortOrder.DESCENDING;
}
/**
* @return current sort state
*/
public SortParam<T> getSort()
{
return param;
}
/**
* Sets the current sort state
*
* @param param
* parameter containing new sorting information
*/
public void setSort(final SortParam<T> param)
{
this.param = param;
}
@Override
public String toString()
{
return "[SingleSortState sort=" + ((param == null) ? "null" : param.toString()) + ']';
}
}