package org.codehaus.xfire.handler;import java.util.ArrayList;import java.util.Collection;public class HandlerOrderer{    private ArrayList handlers = new ArrayList();        public void insertHandler(Handler handler)    {        if (handlers.size() == 0)        {            handlers.add(handler);            return;        }                int begin = -1;        int end = handlers.size();                Collection before = handler.getBefore();        Collection after = handler.getAfter();        for (int i = 0; i < handlers.size(); i++)        {            Handler cmp = (Handler) handlers.get(i);            if (before.contains(cmp.getClass().getName()))            {                if (i < end) end = i;            }            if (cmp.getBefore().contains(handler.getClass().getName()))            {                if (i > begin) begin = i;                        }                        if (after.contains(cmp.getClass().getName()))            {                if (i > begin) begin = i;            }                        if (cmp.getAfter().contains(handler.getClass().getName()))            {                if (i < end) end = i;                            }        }        if (end < begin+1)            throw new IllegalStateException("Invalid ordering for handler " + handler.getClass().getName());                handlers.add(begin+1, handler);    }    public ArrayList getHandlers()    {        return handlers;    }}