calc
Class BaseCalc

java.lang.Object
  |
  +--calc.BaseCalc

Direct Known Subclasses:

AddCalc, CosCalc, DivCalc, ExpCalc, ImCalc, MultiplyCalc, NumeralCalc, PowerCalc, RealCalc, SinCalc, SubtractCalc, VariableCalc, ZetaCalc

public abstract class BaseCalc

extends java.lang.Object

This class is the base for all kind of calculations. It's subclasses represent the nodes in the Operational Tree constructed by ExprParser

Field Summary

protected boolean	calculated
protected BaseCalc[]	children
protected Complex	result

Constructor Summary

BaseCalc()

Method Summary

void	calculate() Wrapper for doCalculate.
void	clear() remove the calculated-flag
protected abstract void	doCalculate() implemented by subclasses, does the real calculation by recursively calling it's children
abstract int	getArgsNr() overridden by inheriting class, needed for consistency-checks
abstract java.lang.String	getArithmeticSymbol() must be implemented for debugging purposes: returns "+" for AddCalc, etc.
BaseCalc[]	getChildren() returns an array with the child-nodes
void	insertChildren(BaseCalc[] children) connects the Object to another BaseCalc and uses it's output as input
static void	main(java.lang.String[] args) for testing purposes
Complex	result() return the result calculated by calculate()
java.lang.String	toString() returns a string representing the arithmetic operation

Methods inherited from class java.lang.Object

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

Field Detail

result

protected Complex result

children

protected BaseCalc[] children

calculated

protected boolean calculated

Constructor Detail

BaseCalc

public BaseCalc()

Method Detail

getArgsNr

public abstract int getArgsNr()

overridden by inheriting class, needed for consistency-checks

insertChildren

public void insertChildren(BaseCalc[] children)
                    throws calc.IllegalArgException

connects the Object to another BaseCalc and uses it's output as input

getChildren

public BaseCalc[] getChildren()

returns an array with the child-nodes

calculate

public void calculate()

Wrapper for doCalculate. Keeps track of the state

doCalculate

protected abstract void doCalculate()

implemented by subclasses, does the real calculation by recursively calling it's children

result

public Complex result()

return the result calculated by calculate()

clear

public void clear()

remove the calculated-flag

toString

public java.lang.String toString()

returns a string representing the arithmetic operation

Overrides:

toString in class java.lang.Object

getArithmeticSymbol

public abstract java.lang.String getArithmeticSymbol()

must be implemented for debugging purposes: returns "+" for AddCalc, etc.

main

public static void main(java.lang.String[] args)

for testing purposes