Package net.sf.saxon.regex.charclass
Class EmptyCharacterClass
- java.lang.Object
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- net.sf.saxon.regex.charclass.EmptyCharacterClass
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- All Implemented Interfaces:
java.util.function.IntPredicate,CharacterClass
public class EmptyCharacterClass extends java.lang.Object implements CharacterClass
A character class represents a set of characters for regex matching purposes. The empty character class matches no characters
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static CharacterClassgetComplement()static EmptyCharacterClassgetInstance()IntSetgetIntSet()Get the set of matching characters if available.booleanisDisjoint(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).booleantest(int value)
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Method Detail
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getInstance
public static EmptyCharacterClass getInstance()
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getComplement
public static CharacterClass getComplement()
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test
public boolean test(int value)
- Specified by:
testin interfacejava.util.function.IntPredicate
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isDisjoint
public boolean isDisjoint(CharacterClass other)
Description copied from interface:CharacterClassAsk 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:
isDisjointin interfaceCharacterClass- 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
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getIntSet
public IntSet getIntSet()
Description copied from interface:CharacterClassGet the set of matching characters if available. If not available, return null- Specified by:
getIntSetin interfaceCharacterClass
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