
wicket.extensions.markup.html.repeater.util.EmptyDataProvider Maven / Gradle / Ivy
/*
* $Id: EmptyDataProvider.java 458264 2005-12-08 07:50:37Z ivaynberg $
* $Revision: 458264 $
* $Date: 2005-12-08 08:50:37 +0100 (Thu, 08 Dec 2005) $
*
* ====================================================================
* 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.util;
import java.util.Collections;
import java.util.Iterator;
import wicket.extensions.markup.html.repeater.data.IDataProvider;
import wicket.model.IModel;
/**
* A convienience class to represent an empty data provider.
*
* @author Phil Kulak
*/
public class EmptyDataProvider implements IDataProvider
{
private static final long serialVersionUID = 1L;
private static EmptyDataProvider INSTANCE = new EmptyDataProvider();
/**
* @return the singleton instance of this class
*/
public static EmptyDataProvider getInstance()
{
return INSTANCE;
}
/**
* @see wicket.extensions.markup.html.repeater.data.IDataProvider#iterator(int,
* int)
*/
public Iterator iterator(int first, int count)
{
return Collections.EMPTY_LIST.iterator();
}
/**
* @see wicket.extensions.markup.html.repeater.data.IDataProvider#size()
*/
public int size()
{
return 0;
}
/**
* @see wicket.extensions.markup.html.repeater.data.IDataProvider#model(java.lang.Object)
*/
public IModel model(Object object)
{
return null;
}
}
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