gpsys.primitives
Class EQ

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

public class EQ

extends Function

	BOOLEAN EQ(<typeX> a, <typeX> b)
 

EQ is a generic function that tests the equality of its two arguments. EQ needs to be Type instantiated during construction to work with particular argument Types. The supported argument Types include BYTE, SHORT, INT, LONG, FLOAT, DOUBLE, CHAR and BOOLEAN.

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

EQ(Type argTypes)
Constructs an EQ Function that works with the specified Type.

Method Summary

boolean	evaluateBoolean(Individual i, Gene[] arguments) Used to test arguments of any of the supported Types for equality.
Primitive	instance() Creates an instance of this EQ object.
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

EQ

public EQ(Type argTypes)

Constructs an EQ Function that works with the specified Type. The supported Types include BYTE, SHORT, INT, LONG, FLOAT, DOUBLE, CHAR and BOOLEAN.

Parameters:

type - The Type of this EQ Function.

Method Detail

evaluateBoolean

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

Used to test arguments of any of the supported Types for equality.

Parameters:

i - The individual being evaluated.

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

Returns:

A boolean whose value is true if they are equal and false otherwise.

Throws:

EvaluationException - If there is an evaluation failure.

Overrides:

evaluateBoolean in class Function

instance

public final Primitive instance()

Creates an instance of this EQ object. The Type instantiation is preserved so that if an INT EQ is being cloned, the clone will also be INT instantiated.

Returns:

A reference to this Object (yes the same object, since the type information is to be the same, there are therefore no instance variables to be modified.

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