and.java

RFID复杂事件处理系统的研究实验

package test2;


public class AND extends NonLeaf{
	
	public AND()
	{
		super("*");
	}
	public C_Event work(NonLeaf n,Node n1)//n父结点；n1子结点 chronic
	{
		C_Event ce=null;
		Node n2;
		if(n1==n.getlchild()){
			n2=n.getrchild();				
		}else n2=n.getlchild();
		
		NonLeaf p1,p2;
		Leaf q1,q2;
		
		if(n1.getisleaf() && n2.getisleaf())
		{
			q1=(Leaf)n1;
			q2=(Leaf)n2;
			//
			if(q2.getevents().size()==0) 
			{
				q1.getevents().removeLast();
				return ce;
			}
			else{				
				ce=new C_Event(q1.getevents().removeLast(),q2.getevents().removeFirst(),n);
			}
		}else{
			if(!n1.getisleaf() && n2.getisleaf())
			{
				p1=(NonLeaf)n1;
				q2=(Leaf)n2;
				
				if(q2.getevents().size()==0)
				{
					p1.getmid_result().removeLast();
					return ce;
				}
				else{					
						ce=new C_Event(q2.getevents().removeFirst(),p1.getmid_result().removeLast(),n);		
				}
			}else{
				if(n1.getisleaf() && !n2.getisleaf())
				{
					
					q1=(Leaf)n1;
					p2=(NonLeaf)n2;
					if(!p2.getoperator().equals("!")){
					if(p2.getmid_result().size()==0)
					{
						q1.getevents().removeLast();
						return ce;
					}
					else{						
					    ce=new C_Event(q1.getevents().removeLast(),p2.getmid_result().removeFirst(),n);										
					}}else{
						if(p2.getmid_result().size()==0) 
						{
							ce=new C_Event(q1.getevents().removeLast(),n);
						}
						else{							
								q1.getevents().removeLast();
								return ce;									
					    }
					}
				}else{
					
					p1=(NonLeaf)n1;
					p2=(NonLeaf)n2;		
					if(!p2.getoperator().equals("!")){
					if(p2.getmid_result().size()==0) 
					{
						p1.getmid_result().removeLast();
						return ce;
					}
					else{						
						ce=new C_Event(p1.getmid_result().removeLast(),p2.getmid_result().removeFirst(),n);																													
					}
				}
				else{
					if(p2.getmid_result().size()==0) 
					{
						ce=new C_Event(p1.getmid_result().removeLast(),n);						
					}
					else{
						
						p1.getmid_result().removeLast();
						return ce;
							
				    }
				}
				}
			}
		}
		return ce;
	}
	
}