gpsys.primitives
Class And

java.lang.Object
  |
  +--gpsys.Primitive
        |
        +--gpsys.Function
              |
              +--gpsys.primitives.And

public class And

extends Function

	BOOLEAN and(BOOLEAN b1, BOOLEAN b2)
 

And is a boolean function that returns the logical "and" of both arguments. Note that And is NOT lazy, so that both arguments are still evaluated even if the first argument is False.

Version:

$Revision: 1.1 $, $Date: 2000/07/05 16:24:33 $

Author:

Adil Qureshi

Department of Computer Science,

University College London,

Gower St,

London WC1E 6BT,

UK.

See Also:

Type, Primitive, Function, Serialized Form

Fields inherited from class gpsys.Function

argTypes

Fields inherited from class gpsys.Primitive

type

Constructor Summary

And()
Construct an instance of the And Function.

Method Summary

boolean	evaluateBoolean(Individual i, Gene[] arguments) Perform the logical And of both arguments and return the result.
Primitive	instance() Creates an instance of this And Function.
java.lang.String	toString() Returns a String representation of this Function.

Methods inherited from class gpsys.Function

evaluateByte, evaluateChar, evaluateDouble, evaluateFloat, evaluateInt, evaluateLong, evaluateObject, evaluateShort

Methods inherited from class java.lang.Object

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

Constructor Detail

And

public And()

Construct an instance of the And Function. The And Function is of BOOLEAN Type and is hence typed accordingly.

Method Detail

evaluateBoolean

public final boolean evaluateBoolean(Individual i,
                                     Gene[] arguments)
                              throws EvaluationException

Perform the logical And of both arguments and return the result.

Parameters:

i - The individual being evaluated.

arguments - The Gene trees representing the arguments to be Anded.

Returns:

A boolean representing the logical and of the arguments.

Throws:

EvaluationException - If there is an evaluation failure.

Overrides:

evaluateBoolean in class Function

instance

public final Primitive instance()

Creates an instance of this And Function.

Returns:

A reference to this object.

Overrides:

instance in class Primitive

toString

public java.lang.String toString()

Returns a String representation of this Function.

Returns:

A String containing the name of the Function.

Overrides:

toString in class Primitive