jxl.biff.formula
Class VariableArgFunction

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

All Implemented Interfaces:

ParsedThing

class VariableArgFunction

extends Operator

implements ParsedThing

A built in function in a formula. These functions take a variable number of arguments, such as a range (eg. SUM etc)

Field Summary

private int	arguments The number of arguments
private Function	function The function
private boolean	readFromSheet Flag which indicates whether this was initialized from the client api or from an excel sheet

Fields inherited from class jxl.biff.formula.Operator

operands

Fields inherited from class jxl.biff.formula.ParseItem

parent

Constructor Summary

VariableArgFunction()
Constructor

VariableArgFunction(Function f, int a)
Constructor used when parsing a function from a string

Method Summary

(package private) byte[]	getBytes() Gets the token representation of this item in RPN
(package private) Function	getFunction() Gets the underlying function
void	getOperands(java.util.Stack s) Gets the operands for this operator from the stack
(package private) int	getPrecedence() Gets the precedence for this operator.
void	getString(java.lang.StringBuffer buf) Gets the string representation of this item
int	read(byte[] data, int pos) Reads the ptg data from the array starting at the specified position

Methods inherited from class jxl.biff.formula.Operator

add, getOperands

Methods inherited from class jxl.biff.formula.ParseItem

setParent

Methods inherited from class java.lang.Object

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

Field Detail

function

private Function function

The function

arguments

private int arguments

The number of arguments

readFromSheet

private boolean readFromSheet

Flag which indicates whether this was initialized from the client api or from an excel sheet

Constructor Detail

VariableArgFunction

public VariableArgFunction()

Constructor

VariableArgFunction

public VariableArgFunction(Function f,
                           int a)

Constructor used when parsing a function from a string

Parameters:

f - the function

a - the number of arguments

Method Detail

read

public int read(byte[] data,
                int pos)
         throws FormulaException

Reads the ptg data from the array starting at the specified position

Specified by:

read in interface ParsedThing

Parameters:

data - the RPN array

pos - the current position in the array, excluding the ptg identifier

Returns:

the number of bytes read

Throws:

FormulaException -

getOperands

public void getOperands(java.util.Stack s)

Gets the operands for this operator from the stack

Overrides:

getOperands in class Operator

getString

public void getString(java.lang.StringBuffer buf)

Description copied from class: ParseItem

Gets the string representation of this item

Overrides:

getString in class ParseItem

getFunction

Function getFunction()

Gets the underlying function

getBytes

byte[] getBytes()

Gets the token representation of this item in RPN

Overrides:

getBytes in class ParseItem

Returns:

the bytes applicable to this formula

getPrecedence

int getPrecedence()

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

Overrides:

getPrecedence in class Operator

Returns:

the operator precedence