hlt.language.util

Class RegExpSymbol

java.lang.Object

hlt.language.util.RegExp

hlt.language.util.RegExpSymbol

public class RegExpSymbol
extends RegExp

This class is a concrete implementation of the abstract class RegExp. It is meant to represent an alphabet symbol. It is simply a wrapper for an object to be used as an alphabet symbol in a RE. Alphabet symbols are uniquely represented. So this also provides a factory to return a unique symbol from a specified object (using equals on the objects). Hence, it has no public constructor.

Version:

Last modified on Thu Oct 18 22:48:18 2012 by hak

Author:

Hassan Aït-Kaci

Copyright:

© Hassan Aït-Kaci

Field Summary

Fields inherited from class hlt.language.util.RegExp

BINARY_EXP, CHOICE_EXP, CONCAT_EXP, EMPTY, EMPTY_EXP, OPTION_EXP, PLUS_EXP, POWER_EXP, RANGE_EXP, STAR_EXP, SYMBOL_EXP, UNARY_EXP

Method Summary

Methods

Modifier and Type	Method and Description
RegExp	deepCopy() This returns a deep copy of this RegExp.
boolean	equals(java.lang.Object other) Returns true iff the specified object is a RegExpSymbol that has the same name as this.
static RegExpSymbol	get(java.lang.Object object) This is the public factory method for creating RegExpSymbol objects.
java.lang.String	name() Returns this RegExpSymbol's name as a unique id.
RegExp	normalize() Returns this RegExpSymbol as its own normal form.
java.lang.Object	object() Returns this RegExpSymbol's object.
void	setName(java.lang.String name) Sets the name of this RegExpSymbol to the specified string.
RegExp	shallowCopy() This returns a shallow copy of this RegExp.
java.lang.String	toString() Returns a printable form for this RegExpSymbol.
int	type() This returns the specific type identifying this RegExp.

Methods inherited from class hlt.language.util.RegExp

cleanup, isBinary, isChoice, isConcat, isEmpty, isLexLess, isOption, isPlus, isPower, isRange, isStar, isSymbol, isUnary, normEquals, noTrace, tag, toggleTrace, toNormalString, trace, tracing

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

shallowCopy

public final RegExp shallowCopy()

Description copied from class: RegExp

This returns a shallow copy of this RegExp.

Specified by:

shallowCopy in class RegExp

deepCopy

public final RegExp deepCopy()

Description copied from class: RegExp

This returns a deep copy of this RegExp.

Specified by:

deepCopy in class RegExp

type

public final int type()

Description copied from class: RegExp

This returns the specific type identifying this RegExp.

Specified by:

type in class RegExp

object

public final java.lang.Object object()

Returns this RegExpSymbol's object.

setName

public final void setName(java.lang.String name)

Sets the name of this RegExpSymbol to the specified string.

name

public final java.lang.String name()

Returns this RegExpSymbol's name as a unique id.

get

public static RegExpSymbol get(java.lang.Object object)

This is the public factory method for creating RegExpSymbol objects. It returns a canonical RegExpSymbol wrapper for the specified object. If the argument is null, this returns the canonical EMPTY RegExpSymbol. Otherwise, it will return the same RegExpSymbol for equals objects.

normalize

public final RegExp normalize()

Returns this RegExpSymbol as its own normal form.

Specified by:

normalize in class RegExp

equals

public final boolean equals(java.lang.Object other)

Returns true iff the specified object is a RegExpSymbol that has the same name as this.

Overrides:

equals in class java.lang.Object

toString

public final java.lang.String toString()

Returns a printable form for this RegExpSymbol.

Overrides:

toString in class java.lang.Object