org.jiemamy.utils.collection.IterableNodeList.java Source code

Introduction

Here is the source code for org.jiemamy.utils.collection.IterableNodeList.java

Source

/*
 * Copyright 2007-2012 Jiemamy Project and the Others.
 * Created on 2009/01/28
 *
 * This file is part of Jiemamy.
 *
 * 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.jiemamy.utils.collection;

import java.util.Iterator;
import java.util.NoSuchElementException;

import org.apache.commons.lang.Validate;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/**
 * {@link NodeList}?{@link Iterable}
 * 
 * @version $Id$
 * @author daisuke
 */
public class IterableNodeList implements Iterable<Node> {

    private final NodeList nodeList;

    /**
     * ??
     * 
     * @param nodeList 
     */
    public IterableNodeList(NodeList nodeList) {
        Validate.notNull(nodeList);
        this.nodeList = nodeList;
    }

    public Iterator<Node> iterator() {
        return new NodeListIterator();
    }

    /**
     * {@link NodeList}?{@link Iterator}
     * 
     * @author daisuke
     */
    public class NodeListIterator implements Iterator<Node> {

        private int index;

        public boolean hasNext() {
            return nodeList.getLength() > index;
        }

        public Node next() {
            Node item = nodeList.item(index++);
            if (item == null) {
                throw new NoSuchElementException();
            }
            return item;
        }

        public void remove() {
            throw new UnsupportedOperationException("remove");
        }

    }

}