Package org.nutz.el.opt.logic

Source Code of org.nutz.el.opt.logic.AndOpt

package org.nutz.el.opt.logic;

import org.nutz.el.ElException;
import org.nutz.el.opt.TwoTernary;

/**
* and
* @author juqkai(juqkai@gmail.com)
*
*/
public class AndOpt extends TwoTernary {
  public int fetchPriority() {
    return 11;
  }
 
  public Object calculate() {
    Object lval = calculateItem(this.left);
    if(!(lval instanceof Boolean)){
      throw new ElException("操作数类型错误!");
    }
    if(!(Boolean)lval){
      return false;
    }
    Object rval = calculateItem(this.right);
    if(!(rval instanceof Boolean)){
      throw new ElException("操作数类型错误!");
    }
    if(!(Boolean)rval){
      return false;
    }
    return true;
  }

  public String fetchSelf() {
    return "&&";
  }

}
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