Class ALabel.EmptyLabel

java.lang.Object

it.univr.di.labeledvalue.ALabel

it.univr.di.labeledvalue.ALabel.EmptyLabel

All Implemented Interfaces:

Serializable, Comparable<ALabel>, Iterable<ALabelAlphabet.ALetter>

Enclosing class:

ALabel

public static final class ALabel.EmptyLabel
extends ALabel

An unmodifiable empty label.

Version:

$Rev: 1153 $

Author:

posenato

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class ALabel

ALabel.EmptyLabel, ALabel.State

Modifier and Type	Class	Description
static final class	ALabel.EmptyLabel	An unmodifiable empty label.
static enum	ALabel.State	Possible state of a ALabelAlphabet.ALetter in an alphabetic label.

Field Summary

Fields inherited from class ALabel

ALABEL_RE, ALABEL_SEPARATOR, ALABEL_SEPARATORstring, emptyLabel, labelValidator, MAX_ALABELALPHABET_SIZE, modCount

Modifier and Type	Field	Description
static final String	ALABEL_RE	Regular expression representing an ALabel.
static final char	ALABEL_SEPARATOR	ALabel separator '∙'.
static final String	ALABEL_SEPARATORstring	ALabel separator '∙'.
static final ALabel	emptyLabel	A constant empty label to represent an empty label that cannot be modified.
static final org.netbeans.validation.api.Validator<String>	labelValidator	Validator for a graphical interface
static final byte	MAX_ALABELALPHABET_SIZE	Maximum size for the alphabet.
protected final int	modCount	The number of times this ALabel has been structurally modified.

Constructor Summary

Constructors

Constructor	Description
EmptyLabel()	default constructor

Method Summary

Modifier and Type	Method	Description
int	compareTo(ALabel l)	To speed up this method, and considering that the ALabelAlphabet order may not be the expected alphabetic one (the first letter in an ALabelAlphabet can be 'nodeZ' and the last one 'aNode'), the order of labels is given with respect to their indexes in their ALabelAlphabet.
boolean	conjoin(ALabelAlphabet.ALetter aLetter)	Conjoins ALetter to this.
ALabel	conjunction(ALabel label)	Conjoins ALabel to this and returns the result without modifying this.
boolean	contains(ALabel label)	L1 contains L2 if L1 contains all ALetters of L2.
boolean	contains(ALabelAlphabet.ALetter letter)
boolean	equals(Object o)
int	hashCode()
boolean	isEmpty()
Iterator<ALabelAlphabet.ALetter>	iterator()
void	remove(ALabelAlphabet.ALetter letter)	It removes the ALetter if it is present.
void	remove(ALabelAlphabet.ALetter[] letter)	It removes all ALetters in inputSet from the current label.
int	size()
String	toString()

Methods inherited from class ALabel

clear, clone, equals, getALetter, getAlphabet, getLetter, getState, intersect, parse, put, remove, remove, toLowerCase, toUpperCase

Modifier and Type	Method	Description
void	clear()	Makes the label empty.
static ALabel	clone(ALabel label)	To have a correct copy of an ALabel.
boolean	equals(ALabelAlphabet.ALetter name)	Compare the letter with an ALetter name.
final ALabelAlphabet.ALetter	getALetter()
final ALabelAlphabet	getAlphabet()
(package private) final ALabelAlphabet.ALetter	getLetter(byte letterIndex)
(package private) final ALabel.State	getState(byte letterIndex)
final ALabel	intersect(ALabel label)
static ALabel	parse(String s, ALabelAlphabet alphabet)	Parse a string representing an ALabel and return an equivalent ALabel object if no errors are found, or if it is null otherwise.
boolean	put(ALabelAlphabet.ALetter l)
(package private) final void	remove(byte index)
final void	remove(ALabel aLabel)	It removes all ALetters in ALabel from the current label.
final String	toLowerCase()
String	toUpperCase()

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface Iterable

forEach, spliterator

Constructor Details

EmptyLabel

public EmptyLabel()

default constructor

Method Details

compareTo

public int compareTo(ALabel l)

Description copied from class: ALabel

To speed up this method, and considering that the ALabelAlphabet order may not be the expected alphabetic one (the first letter in an ALabelAlphabet can be 'nodeZ' and the last one 'aNode'), the order of labels is given with respect to their indexes in their ALabelAlphabet.

Specified by:

compareTo in interface Comparable<ALabel>

Overrides:

compareTo in class ALabel

conjoin

public boolean conjoin(ALabelAlphabet.ALetter aLetter)

Description copied from class: ALabel

Conjoins ALetter to this.

Overrides:

conjoin in class ALabel

Parameters:

aLetter - the ALetter to conjoin.

Returns:

true if ALetter is added, false otherwise.

conjunction

public ALabel conjunction(ALabel label)

Description copied from class: ALabel

Conjoins ALabel to this and returns the result without modifying this.

Overrides:

conjunction in class ALabel

Parameters:

label - the label to conjoin

Returns:

a new label with the conjunction of 'this' and 'label'. Returns null if this cannot be combined with the given label.

contains

public boolean contains(ALabel label)

Description copied from class: ALabel

L₁ contains L₂ if L₁ contains all ALetters of L₂.

Overrides:

contains in class ALabel

Parameters:

label - the label to check

Returns:

true if this contains the label.

contains

public boolean contains(ALabelAlphabet.ALetter letter)

Overrides:

contains in class ALabel

Parameters:

letter - the proposition to check.

Returns:

true if this contains the proposition in any state: straight, negated, or unknown.

equals

public boolean equals(Object o)

Overrides:

equals in class ALabel

Parameters:

o - the input object

Returns:

true if o is an empty label, false otherwise

hashCode

public int hashCode()

Overrides:

hashCode in class ALabel

Returns:

0 as hascode

isEmpty

public boolean isEmpty()

Overrides:

isEmpty in class ALabel

Returns:

true if the label contains no literal.

iterator

@Nonnull
public Iterator<ALabelAlphabet.ALetter> iterator()

Specified by:

iterator in interface Iterable<ALabelAlphabet.ALetter>

Overrides:

iterator in class ALabel

remove

public void remove(ALabelAlphabet.ALetter letter)

Description copied from class: ALabel

It removes the ALetter if it is present. Otherwise, it does nothing.

Overrides:

remove in class ALabel

Parameters:

letter - the letter to remove.

remove

public void remove(ALabelAlphabet.ALetter[] letter)

Description copied from class: ALabel

It removes all ALetters in inputSet from the current label.

Overrides:

remove in class ALabel

Parameters:

letter - ALetter to remove.

size

public int size()

Overrides:

size in class ALabel

Returns:

Return the number of literals of the label

toString

public String toString()

Overrides:

toString in class ALabel