EDU.ksu.cis.calculator.javamodel
Class Power

java.lang.Object
  |
  +--EDU.ksu.cis.calculator.javamodel.Power

All Implemented Interfaces:

EncodedOperation, Operation

public class Power

extends Object

implements EncodedOperation

The general exponentiation operation.

Author:

Rod Howell (howell@cis.ksu.edu)

Constructor Summary

Power()

Method Summary

Object	doOperation(Object[] operands) Returns the result of raising operand[0] to the power of operand[1].
int	numOperands() Returns 2.

Methods inherited from class java.lang.Object

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

Constructor Detail

Power

public Power()

Method Detail

numOperands

public int numOperands()

Returns 2.

Specified by:

numOperands in interface Operation

doOperation

public Object doOperation(Object[] operands)
                   throws ArrayIndexOutOfBoundsException,
                          ClassCastException,
                          ArithmeticException

Returns the result of raising operand[0] to the power of operand[1].

Specified by:

doOperation in interface EncodedOperation

Parameters:

operands - The operands for the operation. The length of this array should match the value returned by Operation.numOperands().

Returns:

The result of the operation.

Throws:

ArrayIndexOutOfBoundsException - If operands is not of length at least 2.

ClassCastException - If the elements of operands are not both BigIntegers.

ArithmeticException - If operand[1] is negative.