package cn.edu.buaa.ieguam.logmanage;

import java.util.Iterator;
import cn.edu.buaa.ieguam.logmanage.MBean;

/**
 * 依據(jù)MBean的設(shè)置，在系統(tǒng)的MBeanTree基礎(chǔ)樹中，構(gòu)造符合日志查詢操作的子樹。
 * 在MBeanTree中MBean的權(quán)限依照MBean.degree的級別“debug”-“work”-“sleep”，權(quán)限有高到低。
 * @author tongxiaodong
 * Creation time:Apr 23, 2007 10:17:25 PM
 */

public class NewSelectTreeDef implements ReadTreeMBean {
	
	private MBean father = null;
	private MBean child = null;
	private String side = null;

	
	public void readMBean(Object fatherMBean, Object childMBean, String side) 
	{
        //TODO Auto-generated method stub
		this.father = (MBean) fatherMBean;
		this.child = (MBean) childMBean;
		this.side = side;
				
		
		if(child.getDegree().equals("sleep"))//若child節(jié)點狀態(tài)為“sleep”
		{			
			if(child.hasLeftChild()==false && child.hasRightChild()==false)//若child為葉節(jié)點（即無子節(jié)點）
			{			
				if(father != null)//若存在父節(jié)點
				{			
					if(father.hasRightChild(child) != null)//child若為father的右子節(jié)點
					{			
						if(father.removeRightChild(child) == true)//刪除該字節(jié)點
						{
							father.decreRightNum();//由于去除了一個右子節(jié)點，father的rightNum自減1
						}
						child.setFather(null);//將father從child的父結(jié)點中去除
						
					}
					else//child若為father的左子節(jié)點
					{
						if(father.getDegree().equals("sleep") == false)//若父節(jié)點狀態(tài)不是“sleep”
						{
							child.setDegree("work");//狀態(tài)設(shè)置為"work"
						}			
					}		
				}
			
			}
			else//若child非葉節(jié)點（即含有子節(jié)點）
			{		
				if(this.allSleepingChild(child) == true)//若child的子節(jié)點狀態(tài)全為“sleep”
				{		
					if(father == null)//若父節(jié)點為空
					{
						if(child.hasLeftChild()==true)
						{
							child.getLeftChildList().clear();//清空左子節(jié)點
						}
						if(child.hasRightChild()==true)
						{
							child.getRightChildList().clear();//清空右子節(jié)點
						}				
					}
					else//若父節(jié)點非空
					{
						if(father.getDegree().equals("sleep")==false && father.hasRightChild(child)==null)
						{
							//若father狀態(tài)為“sleep”，且child不是father的右節(jié)點
							child.setDegree("work");
						}
						else
						{	
							if(father.removeRightChild(child) == true)//刪除該字節(jié)點
							{
								father.decreRightNum();//由于去除了一個右子節(jié)點，father的rightNum自減1
							}
							child.setFather(null);//將father從child的父結(jié)點中去除
							if(child.hasLeftChild()==true)
							{
								child.getLeftChildList().clear();//清空左子節(jié)點
							}
							if(child.hasRightChild()==true)
							{
								child.getRightChildList().clear();//清空右子節(jié)點
							}							
						}
					}
				}
				else
				{
					child.setDegree("work");
				}
			}
		}
	}
	
	
	/**
	 * 判斷MBean 的子節(jié)點狀態(tài)是否全為“sleep”。
	 * @return 若沒有子節(jié)點或全為“sleep”，則返回true；若有的節(jié)點狀態(tài)非“sleep”，則返回false
	 */
	private boolean allSleepingChild(MBean mBean)
	{
		boolean flag = true;
		MBean childMBean = null;
		Iterator iter = null;
		
		if(mBean.hasLeftChild()==true)//若存在左子節(jié)點
		{
			iter = mBean.getLeftChildList().iterator();
			while(iter.hasNext())
			{
				childMBean = (MBean) iter.next();
				if(childMBean.getDegree().equals("sleep") == false)
				{
					flag = false;
					return flag;
				}
			}
		}
		if(mBean.hasRightChild()==true)//若存在右子節(jié)點
		{
			iter = mBean.getRightChildList().iterator();
			while(iter.hasNext())
			{
				childMBean = (MBean) iter.next();
				if(childMBean.getDegree().equals("sleep") == false)
				{
					flag = false;
					return flag;
				}
			}
		}	
		return flag;
	}

}