jxl.biff.formula
Class Operator

java.lang.Object
  |
  +--jxl.biff.formula.ParseItem
        |
        +--jxl.biff.formula.Operator

Direct Known Subclasses:

Attribute, BinaryOperator, BuiltInFunction, Parenthesis, StringOperator, UnaryOperator, VariableArgFunction

abstract class Operator

extends ParseItem

An operator is a node in a parse tree. Its children can be other operators or operands Arithmetic operators and functions are all considered operators

Field Summary

private ParseItem[]

operands The items which this operator manipulates.

Fields inherited from class jxl.biff.formula.ParseItem

parent

Constructor Summary

Operator()
Constructor

Method Summary

protected void	add(ParseItem n) Adds operands to this item
protected ParseItem[]	getOperands() Gets the operands ie.
abstract void	getOperands(java.util.Stack s) Gets the operands for this operator from the stack
(package private) abstract int	getPrecedence() Gets the precedence for this operator.

Methods inherited from class jxl.biff.formula.ParseItem

getBytes, getString, setParent

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait

Field Detail

operands

private ParseItem[] operands

The items which this operator manipulates. There will be at most two

Constructor Detail

Operator

public Operator()

Constructor

Method Detail

add

protected void add(ParseItem n)

Adds operands to this item

getOperands

public abstract void getOperands(java.util.Stack s)

Gets the operands for this operator from the stack

getOperands

protected ParseItem[] getOperands()

Gets the operands ie. the children of the node

getPrecedence

abstract int getPrecedence()

Gets the precedence for this operator. Operator precedents run from 1 to 5, one being the highest, 5 being the lowest

Returns:

the operator precedence