gi
Class Lexicon.PosixClass

java.lang.Object
  gi.Lexicon.Expression
      gi.Lexicon.Alphabet
          gi.Lexicon.PosixClass

All Implemented Interfaces:

Cloneable

Enclosing class:

Lexicon

protected static class Lexicon.PosixClass
extends Lexicon.Alphabet

This class implements an Alphabet containing the characters in a POSIX character class.

Version:

1.3

Author:

© 1999-2009 Craig A. Rich <carich@csupomona.edu>

Field Summary

private int

posixClass The bit mask representing this PosixClass.

Fields inherited from class gi.Lexicon.Expression

f, i

Constructor Summary

private

Lexicon.PosixClass(int posixClass) Constructs an Alphabet containing the characters in a POSIX character class, and builds the NFA constructed from this Expression.

Method Summary

static Lexicon.PosixClass	alnum() Creates an Alphabet containing the alphanumeric characters.
static Lexicon.PosixClass	alpha() Creates an Alphabet containing the alphabetic characters.
static Lexicon.PosixClass	blank() Creates an Alphabet containing the blank characters.
Object	clone() Creates a clone of this Alphabet, and replicates the NFA constructed from this Expression.
static Lexicon.PosixClass	cntrl() Creates an Alphabet containing the control characters.
(package private) boolean	contains(char a) Indicates whether a character occurs in this Alphabet.
static Lexicon.PosixClass	digit() Creates an Alphabet containing the decimal digit characters.
static Lexicon.PosixClass	graph() Creates an Alphabet containing the graphical characters.
static Lexicon.PosixClass	lower() Creates an Alphabet containing the lowercase alphabetic characters.
static Lexicon.PosixClass	print() Creates an Alphabet containing the printable characters.
static Lexicon.PosixClass	punct() Creates an Alphabet containing the punctuation characters.
static Lexicon.PosixClass	space() Creates an Alphabet containing the space characters.
static Lexicon.PosixClass	upper() Creates an Alphabet containing the uppercase alphabetic characters.
static Lexicon.PosixClass	xdigit() Creates an Alphabet containing the hexadecimal digit characters.

Methods inherited from class java.lang.Object

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

Field Detail

posixClass

private final int posixClass

The bit mask representing this PosixClass.

Constructor Detail

Lexicon.PosixClass

private Lexicon.PosixClass(int posixClass)

Constructs an Alphabet containing the characters in a POSIX character class, and builds the NFA constructed from this Expression.

Parameters:

posixClass - the bit mask representing this PosixClass.

Method Detail

upper

public static Lexicon.PosixClass upper()

Creates an Alphabet containing the uppercase alphabetic characters.

Returns:

an Alphabet containing the uppercase alphabetic characters.

lower

public static Lexicon.PosixClass lower()

Creates an Alphabet containing the lowercase alphabetic characters.

Returns:

an Alphabet containing the lowercase alphabetic characters.

alpha

public static Lexicon.PosixClass alpha()

Creates an Alphabet containing the alphabetic characters.

Returns:

an Alphabet containing the alphabetic characters.

digit

public static Lexicon.PosixClass digit()

Creates an Alphabet containing the decimal digit characters.

Returns:

an Alphabet containing the decimal digit characters.

xdigit

public static Lexicon.PosixClass xdigit()

Creates an Alphabet containing the hexadecimal digit characters.

Returns:

an Alphabet containing the hexadecimal digit characters.

alnum

public static Lexicon.PosixClass alnum()

Creates an Alphabet containing the alphanumeric characters.

Returns:

an Alphabet containing the alphanumeric characters.

punct

public static Lexicon.PosixClass punct()

Creates an Alphabet containing the punctuation characters.

Returns:

an Alphabet containing the punctuation characters.

graph

public static Lexicon.PosixClass graph()

Creates an Alphabet containing the graphical characters.

Returns:

an Alphabet containing the graphical characters.

print

public static Lexicon.PosixClass print()

Creates an Alphabet containing the printable characters.

Returns:

an Alphabet containing the printable characters.

blank

public static Lexicon.PosixClass blank()

Creates an Alphabet containing the blank characters.

Returns:

an Alphabet containing the blank characters.

space

public static Lexicon.PosixClass space()

Creates an Alphabet containing the space characters.

Returns:

an Alphabet containing the space characters.

cntrl

public static Lexicon.PosixClass cntrl()

Creates an Alphabet containing the control characters.

Returns:

an Alphabet containing the control characters.

contains

boolean contains(char a)

Indicates whether a character occurs in this Alphabet.

Specified by:

contains in class Lexicon.Alphabet

Parameters:

a - the character whose status is requested.

Returns:

true if a occurs in this Alphabet; false otherwise.

clone

public Object clone()

Creates a clone of this Alphabet, and replicates the NFA constructed from this Expression.

Specified by:

clone in class Lexicon.Expression

Returns:

a clone of this Alphabet.