ptolemy.data
Class AbsentToken

java.lang.Object
  ptolemy.data.Token
      ptolemy.data.AbsentToken

All Implemented Interfaces:

java.io.Serializable

public class AbsentToken
extends Token

A placeholder token that represents the absence of a token.

Since:

Ptolemy II 8.0

Version:

$Id: AbsentToken.java 57044 2010-01-27 22:41:05Z cxh $

Author:

Paul Whitaker

See Also:

Serialized Form

Accepted Rating:

Red (pwhitake)

Proposed Rating:

Red (pwhitake)

Field Summary

static AbsentToken

ABSENT An instance of an absent token.

Fields inherited from class ptolemy.data.Token

NIL

Constructor Summary

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.