mergeiteratorfilter.java

struts 2 核心包 的源码 有错误是难免的

// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 
// Source File Name:   MergeIteratorFilter.java

package org.apache.struts2.util;

import com.opensymphony.xwork2.Action;
import java.util.*;

// Referenced classes of package org.apache.struts2.util:
//			IteratorFilterSupport

public class MergeIteratorFilter extends IteratorFilterSupport
	implements Iterator, Action
{

	List iterators;
	List sources;
	int idx;

	public MergeIteratorFilter()
	{
		iterators = new ArrayList();
		sources = new ArrayList();
		idx = 0;
	}

	public void setSource(Object anIterator)
	{
		sources.add(anIterator);
	}

	public String execute()
	{
		for (int i = 0; i < sources.size(); i++)
		{
			Object source = sources.get(i);
			iterators.add(getIterator(source));
		}

		return "success";
	}

	public boolean hasNext()
	{
		do
		{
			if (iterators.size() <= 0)
				break;
			if (((Iterator)iterators.get(idx)).hasNext())
				return true;
			iterators.remove(idx);
			if (iterators.size() > 0)
				idx = idx % iterators.size();
		} while (true);
		return false;
	}

	public Object next()
	{
		Object obj = ((Iterator)iterators.get(idx)).next();
		idx = (idx + 1) % iterators.size();
		return obj;
		Exception exception;
		exception;
		idx = (idx + 1) % iterators.size();
		throw exception;
	}

	public void remove()
	{
		throw new UnsupportedOperationException("Remove is not supported in MergeIteratorFilter.");
	}
}