wicket.extensions.markup.html.repeater.refreshing.Item Maven / Gradle / Ivy
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Wicket Extensions is a rich component library for the Wicket framework.
/*
* $Id: Item.java 462569 2006-10-10 21:15:40Z dashorst $
* $Revision: 462569 $
* $Date: 2006-10-10 23:15:40 +0200 (Tue, 10 Oct 2006) $
*
* ====================================================================
* 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 wicket.extensions.markup.html.repeater.refreshing;
import java.util.Comparator;
import wicket.markup.html.WebMarkupContainer;
import wicket.model.IModel;
import wicket.version.undo.Change;
/**
* Container that holds components in a RefreshingView. One Item represents one
* entire row of the view. Users should add all containing components to the
* Item instead of the view, this is accomplished by implementing
* refreshingView.populateItem(Item item).
*
* @see RefreshingView
*
* @author Igor Vaynberg (ivaynberg)
*/
public class Item extends WebMarkupContainer
{
private static final long serialVersionUID = 1L;
/** relative index of this item */
private int index;
/**
* @param id
* component id
* @param index
* relative index of this item in the pageable view
* @param model
* model for this item
*/
public Item(final String id, int index, final IModel model)
{
super(id, model);
this.index = index;
}
/**
* Sets the index of this item
*
* @param index
* new index
*/
public void setIndex(int index)
{
if (this.index != index)
{
if (isVersioned())
{
addStateChange(new Change()
{
final int oldIndex = Item.this.index;
private static final long serialVersionUID = 1L;
public void undo()
{
Item.this.index = oldIndex;
}
public String toString()
{
return "IndexChange[component: " + getPath() + ", index: " + oldIndex + "]";
}
});
}
this.index = index;
}
}
/**
* @return the index assigned to this item
*/
public int getIndex()
{
return index;
}
/**
* @return the primary key assigned to this item
*/
public String getPrimaryKey()
{
return getId();
}
/**
* Comparator that compares Items by their index property
*
* @author Igor Vaynberg (ivaynberg)
*
*/
public static class IndexComparator implements Comparator
{
private static final Comparator instance = new IndexComparator();
/**
* @return static instance of the comparator
*/
public static final Comparator getInstance()
{
return instance;
}
/**
* @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
*/
public int compare(Object o1, Object o2)
{
Item lhs = (Item)o1;
Item rhs = (Item)o2;
return lhs.getIndex() - rhs.getIndex();
}
};
}
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