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package panda.el.opt.object;

import java.util.Queue;

import panda.el.ELContext;
import panda.el.ELException;
import panda.el.opt.AbstractOpt;
import panda.el.opt.Operator;

/**
 * ']',数组封装. 本身没做什么操作,只是对'[' ArrayOpt 做了一个封装而已
 */
public class FetchArrayOpt extends AbstractOpt {
	private Object left;

	public int getPriority() {
		return 1;
	}

	public void wrap(Queue operand) {
		left = operand.poll();
	}

	public Object calculate(ELContext ec) {
		if (left instanceof Operator) {
			return ((Operator)left).calculate(ec);
		}
		throw new ELException("Invalid left operator: " + left);
	}

	public String operator() {
		return "]";
	}
}
    

    

    

            

    

            



    
    






    
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