rp.expn
Class NegateExpn

java.lang.Object
  |
  +--java.util.Observable
        |
        +--rp.expn.Expn
              |
              +--rp.expn.OperatorExpn
                    |
                    +--rp.expn.UnaryOperatorExpn
                          |
                          +--rp.expn.NegateExpn

All Implemented Interfaces:

java.util.Observer

public class NegateExpn

extends UnaryOperatorExpn

A unary operation in an expression tree.

Version:

$Revision: 1.2 $, $Date: 2001/05/23 19:47:04 $

Field Summary

Fields inherited from class rp.expn.OperatorExpn

operands

Constructor Summary

NegateExpn(Expn operand)
Construct a new negation operator with the given operand.

Method Summary

double

getScalarMean() Return a (possibly computed) scalar mean for this node in the expression tree.

Methods inherited from class rp.expn.UnaryOperatorExpn

getUnaryOperand, setUnaryOperand

Methods inherited from class rp.expn.OperatorExpn

getNumOperands, getOperand, getOperand, setNumOperands, setOperand, setOperand, update

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

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

Constructor Detail

NegateExpn

public NegateExpn(Expn operand)

Construct a new negation operator with the given operand.

Parameters:

operand - the unary operand

Method Detail

getScalarMean

public double getScalarMean()

Description copied from class: Expn

Return a (possibly computed) scalar mean for this node in the expression tree. Returns the most straight-forward, easily-computed mean value.

Specified by:

getScalarMean in class Expn