ptolemy.data

Class AbsentToken

java.lang.Object

ptolemy.data.Token

ptolemy.data.AbsentToken

public class AbsentToken
extends Token

A placeholder token that represents the absence of a token.

Since:

Ptolemy II 8.0

Version:

$Id$

Author:

Paul Whitaker

Pt.AcceptedRating:

Red (pwhitake)

Pt.ProposedRating:

Red (pwhitake)

Field Summary

Fields

Modifier and Type	Field and Description
static AbsentToken	ABSENT An instance of an absent token.

Fields inherited from class ptolemy.data.Token

NIL

Constructor Summary

Constructors

Constructor and Description
AbsentToken() Construct a token with value false.

Method Summary

Methods inherited from class ptolemy.data.Token

add, addReverse, divide, divideReverse, getType, isCloseTo, isCloseTo, isEqualTo, isNil, modulo, moduloReverse, multiply, multiplyReverse, notSupportedConversionMessage, notSupportedIncomparableConversionMessage, notSupportedIncomparableMessage, notSupportedMessage, notSupportedNullNilStringMessage, one, pow, subtract, subtractReverse, toString, zero, zeroReturnType

Methods inherited from class java.lang.Object

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

Field Detail

ABSENT

public static final AbsentToken ABSENT

An instance of an absent token.

Constructor Detail

AbsentToken

public AbsentToken()

Construct a token with value false.