org.apache.wicket.markup.repeater.DefaultItemReuseStrategy.java Source code

Introduction

Here is the source code for org.apache.wicket.markup.repeater.DefaultItemReuseStrategy.java

Source

/*
 * 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.markup.repeater;

import java.util.Iterator;

import org.apache.wicket.model.IModel;

/**
 * Implementation of <code>IItemReuseStrategy</code> that returns new items every time.
 * 
 * @see org.apache.wicket.markup.repeater.IItemReuseStrategy
 * 
 * @author Igor Vaynberg (ivaynberg)
 * 
 */
public class DefaultItemReuseStrategy implements IItemReuseStrategy {
    private static final long serialVersionUID = 1L;

    private static final IItemReuseStrategy instance = new DefaultItemReuseStrategy();

    /**
     * @return static instance of this strategy
     */
    public static IItemReuseStrategy getInstance() {
        return instance;
    }

    /**
     * 
     * @see org.apache.wicket.markup.repeater.IItemReuseStrategy#getItems(org.apache.wicket.markup.repeater.IItemFactory,
     *      java.util.Iterator, java.util.Iterator)
     */
    @Override
    public <T> Iterator<Item<T>> getItems(final IItemFactory<T> factory, final Iterator<IModel<T>> newModels,
            Iterator<Item<T>> existingItems) {
        return new Iterator<Item<T>>() {
            private int index = 0;

            @Override
            public void remove() {
                throw new UnsupportedOperationException();
            }

            @Override
            public boolean hasNext() {
                return newModels.hasNext();
            }

            @Override
            public Item<T> next() {
                IModel<T> model = newModels.next();
                Item<T> item = factory.newItem(index, model);
                index++;
                return item;
            }

        };
    }

}