net.christopherschultz.evaluator.function
Class MathFunction

java.lang.Object
  net.christopherschultz.evaluator.StandardFunction
      net.christopherschultz.evaluator.function.MathFunction

All Implemented Interfaces:

Function

Direct Known Subclasses:

BinaryOperator, Difference, MathFunction.DoubleFunction, MathFunction.heaviside, Summation

public abstract class MathFunction
extends StandardFunction

Implementations of standard mathematical functions.

Version:

$Revision: 1.10 $ $Date: 2008-06-20 22:58:48 $

Author:

Chris Schultz

Nested Class Summary

static class	MathFunction.abs
static class	MathFunction.acos
static class	MathFunction.asin
static class	MathFunction.atan
static class	MathFunction.ceil
static class	MathFunction.cos
static class	MathFunction.DoubleFunction
static class	MathFunction.exp
static class	MathFunction.floor
static class	MathFunction.heaviside Implements a heaviside function which takes a numeric or boolean argument.
static class	MathFunction.log
static class	MathFunction.max This class respects the value of the ALLOW_NULL_COMPARISON property.
static class	MathFunction.min This class respects the value of the ALLOW_NULL_COMPARISON property.
static class	MathFunction.pow
static class	MathFunction.random
static class	MathFunction.rint
static class	MathFunction.sin
static class	MathFunction.sqrt
static class	MathFunction.tan
static class	MathFunction.toDegrees
static class	MathFunction.toRadians

Field Summary

static String	ALLOW_NULL_COMPARISON This Boolean evaluation property will change the way that comparison functions work.
static String	NULL_RETURNS_NULL This Boolean evaluation property will change the way that mathematical functions work.

Constructor Summary

MathFunction()

Method Summary

Methods inherited from class net.christopherschultz.evaluator.StandardFunction

call, call, getExpressionValue, getExpressionValueArray, toString

Methods inherited from class java.lang.Object

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

Field Detail

NULL_RETURNS_NULL

public static final String NULL_RETURNS_NULL

This Boolean evaluation property will change the way that mathematical functions work. If set to TRUE, then when a null is found as any operand, it will cause the function to return null immediately.

If set to FALSE, then functions called with null parameters will do the best they can or throw an exception.

The default is TRUE.

ALLOW_NULL_COMPARISON

public static final String ALLOW_NULL_COMPARISON

This Boolean evaluation property will change the way that comparison functions work. If set to TRUE, then when a null is found as an operand, it will be compared to the other operand. If the two are both null, then equals will return TRUE. Otherwise, it will return FALSE.

If set to FALSE, then any comparison involving a null operand will return null.

The default is FALSE.

Constructor Detail

MathFunction

public MathFunction()