org.nutz.el.opt.arithmetic

Class NegativeOpt

java.lang.Object

org.nutz.el.opt.AbstractOpt

org.nutz.el.opt.arithmetic.NegativeOpt

All Implemented Interfaces:

Operator

public class NegativeOpt
extends AbstractOpt

负号:'-'

Author:

juqkai(juqkai@gmail.com)

Constructor Summary

Constructors

Constructor and Description
NegativeOpt()

Method Summary

Modifier and Type	Method and Description
Object	calculate() 计算
int	fetchPriority() 优先级
String	fetchSelf() 操作符对象自身的符号
static boolean	isNegetive(Object prev)
void	wrap(Queue<Object> operand) 打包数据.

Methods inherited from class org.nutz.el.opt.AbstractOpt

calculateItem, equals, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

NegativeOpt

public NegativeOpt()

Method Detail

fetchPriority

public int fetchPriority()

Description copied from interface: Operator

优先级

wrap

public void wrap(Queue<Object> operand)

Description copied from interface: Operator

打包数据. 每个操作符都有相应的操作数,这个方法目的在于,根据操作符自身的需求,从operand中读取相应的操作数

Parameters:

operand - 操作数

calculate

public Object calculate()

Description copied from interface: Operator

计算

fetchSelf

public String fetchSelf()

Description copied from class: AbstractOpt

操作符对象自身的符号

Specified by:

fetchSelf in class AbstractOpt

isNegetive

public static boolean isNegetive(Object prev)