edu.psu.geovista.app.spreadsheet.functions
Class FunctionSP

java.lang.Object
  edu.psu.geovista.app.spreadsheet.functions.Function
      edu.psu.geovista.app.spreadsheet.functions.FunctionSP

Direct Known Subclasses:

FunctionAbs, FunctionAcos, FunctionAsin, FunctionAtan, FunctionCos, FunctionE, FunctionInt, FunctionLog, FunctionPI, FunctionRound, FunctionSqrt, FunctionTan

public abstract class FunctionSP

extends Function

Field Summary

Fields inherited from class edu.psu.geovista.app.spreadsheet.functions.Function

owner

Constructor Summary

FunctionSP()

Method Summary

protected abstract java.lang.Number	doFun(Node node)
java.lang.Number	evaluate(Node node) This should be implemented in each function.
abstract java.lang.String	getDescription() Return the description of the function
abstract java.lang.String	getUsage() Return the usage of the function

Methods inherited from class edu.psu.geovista.app.spreadsheet.functions.Function

checkParamsExist, getFirst, getOwner, getRangeArea, getSingleParameter, getSupportFuntion, isRange, processColonNode, requireParams, setOwner

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionSP

public FunctionSP()

Method Detail

evaluate

public java.lang.Number evaluate(Node node)
                          throws ParserException,
                                 NoReferenceException

Description copied from class: Function

This should be implemented in each function.

Specified by:

evaluate in class Function

Parameters:

node - the function node starting with the funciton name with a chain of parameters

Throws:

ParserException

NoReferenceException

doFun

protected abstract java.lang.Number doFun(Node node)
                                   throws ParserException,
                                          NoReferenceException

Throws:

ParserException

NoReferenceException

getUsage

public abstract java.lang.String getUsage()

Description copied from class: Function

Return the usage of the function

Specified by:

getUsage in class Function

getDescription

public abstract java.lang.String getDescription()

Description copied from class: Function

Return the description of the function

Specified by:

getDescription in class Function