rationals.expr

Class Letter

java.lang.Object

rationals.expr.RationalExpr

rationals.expr.Letter

All Implemented Interfaces:

SemiRing

public class Letter
extends RationalExpr

A letter expression is simply a wrapper over any object. Note that the semantics of equals and hashcode must be properly implemented by the wrapped object as this may be used in Collections, for example as keys in hashtables.

Version:

$Id: Letter.java 2 2006-08-24 14:41:48Z oqube $

Author:

nono

Constructor Summary

Constructors

Constructor and Description
Letter(Object o) Construct a new letter expression.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
int	hashCode()
String	toString()

Methods inherited from class rationals.expr.RationalExpr

mult, one, plus, zero

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Letter

public Letter(Object o)

Construct a new letter expression.

Parameters:

o - label of the letter. May not be null. (use epsilon constant).

Method Detail

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object