EmptyCharacterClass

java.lang.Object

net.sf.saxon.regex.charclass.EmptyCharacterClass

All Implemented Interfaces:: IntPredicate, CharacterClass, IntPredicateProxy

public class EmptyCharacterClass extends Object implements CharacterClass

A character class represents a set of characters for regex matching purposes. The empty character class matches no characters

Method Summary

Modifier and Type

Method

Description

static CharacterClass

getComplement()

static EmptyCharacterClass

getInstance()

IntSet

getIntSet()

Get the set of matching characters if available.

boolean

isDisjoint(CharacterClass other)

Ask whether this character class is known to be disjoint with another character class (that is, the two classes have no characters in common).

boolean

test(int value)

Test whether a particular codepoint is a member of the character class

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.function.IntPredicate
and, negate, or

Methods inherited from interface net.sf.saxon.z.IntPredicateProxy
union

Method Details
- getInstance
  
  public static EmptyCharacterClass getInstance()
- getComplement
  
  public static CharacterClass getComplement()
- test
  
  public boolean test(int value)
  
  Description copied from interface: CharacterClass
  
  Test whether a particular codepoint is a member of the character class
  
  Specified by:
  
  test in interface CharacterClass
  
  Specified by:
  
  test in interface IntPredicate
  
  Specified by:
  
  test in interface IntPredicateProxy
  
  Parameters:
  
  value - the codepoint to be tested
  
  Returns:
  
  true if it matches
- isDisjoint
  
  public boolean isDisjoint(CharacterClass other)
  
  Description copied from interface: CharacterClass
  
  Ask whether this character class is known to be disjoint with another character class (that is, the two classes have no characters in common). If in doubt, return false.
  
  Specified by:
  
  isDisjoint in interface CharacterClass
  
  Parameters:
  
  other - the other character class
  
  Returns:
  
  true if the character classes are known to be disjoint; false if there may be characters in common between the two classes
- getIntSet
  
  public IntSet getIntSet()
  
  Description copied from interface: CharacterClass
  
  Get the set of matching characters if available. If not available, return null
  
  Specified by:
  
  getIntSet in interface CharacterClass