Class CharClasses
- Version:
- JFlex 1.7.0
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate List
<IntCharSet> the char classesprivate static final boolean
debug flag (for char classes only)static final int
the largest character that can be used in char classesprivate int
the largest character actually used in a specification -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
check()
Check consistency of the stored classes [debug].void
dump()
Dumps charclasses to the dump output stream.int
getClassCode
(int codePoint) Returns the code of the character class the specified character belongs to.int[]
getClassCodes
(List<Interval> intervalList) Returns an array that contains the character class codes of all characters in the specified set of input characters.private int[]
getClassCodes
(IntCharSet set, boolean negate) Returns an array that contains the character class codes of all characters in the specified set of input characters.Returns an array of all CharClassIntervals in this char class collection.int
Returns the greatest Unicode value of the current input character set.int[]
getNotClassCodes
(List<Interval> intervalList) Returns an array that contains the character class codes of all characters that are not in the specified set of input characters.int
Returns the current number of character classes.void
Provides space for classes of characters from 0 to maxCharCode.void
makeClass
(int singleChar, boolean caseless) Creates a new character class for the single charactersingleChar
.void
Creates a new character class for each character of the specified String.void
Updates the current partition, so that the specified set of characters gets a new character class.void
makeClass
(IntCharSet set, boolean caseless) Updates the current partition, so that the specified set of characters gets a new character class.void
makeClassNot
(List<Interval> l, boolean caseless) Updates the current partition, so that the set of all characters not contained in the specified set of characters gets a new character class.void
setMaxCharCode
(int maxCharCode) Sets the largest Unicode value of the current input character set.toString()
Returns a string representation of the char classes stored in this class.toString
(int theClass) Returns a string representation of one char class
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Field Details
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DEBUG
private static final boolean DEBUGdebug flag (for char classes only)- See Also:
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maxChar
public static final int maxCharthe largest character that can be used in char classes- See Also:
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classes
the char classes -
maxCharUsed
private int maxCharUsedthe largest character actually used in a specification -
scanner
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Constructor Details
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CharClasses
public CharClasses()Constructs a new CharClasses object.CharClasses.init() is delayed until UnicodeProperties.init() has been called, since the max char code won't be known until then.
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Method Details
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init
Provides space for classes of characters from 0 to maxCharCode.Initially all characters are in class 0.
- Parameters:
maxCharCode
- the last character code to be considered. (127 for 7bit Lexers, 255 for 8bit Lexers and UnicodeProperties.getMaximumCodePoint() for Unicode Lexers).scanner
- the scanner containing the UnicodeProperties instance from which caseless partitions are obtained.
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getMaxCharCode
public int getMaxCharCode()Returns the greatest Unicode value of the current input character set.- Returns:
- unicode value.
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setMaxCharCode
public void setMaxCharCode(int maxCharCode) Sets the largest Unicode value of the current input character set.- Parameters:
maxCharCode
- the largest character code, used for the scanner (i.e. %7bit, %8bit, %16bit etc.)
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getNumClasses
public int getNumClasses()Returns the current number of character classes.- Returns:
- number of character classes.
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makeClass
Updates the current partition, so that the specified set of characters gets a new character class.Characters that are elements of
set
are not in the same equivalence class with characters that are not elements ofset
.- Parameters:
set
- the set of characters to distinguish from the restcaseless
- if true upper/lower/title case are considered equivalent
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getClassCode
public int getClassCode(int codePoint) Returns the code of the character class the specified character belongs to.- Parameters:
codePoint
- code point.- Returns:
- code of the character class.
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dump
public void dump()Dumps charclasses to the dump output stream. -
toString
Returns a string representation of one char class- Parameters:
theClass
- the index of the class to- Returns:
- a
String
object.
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toString
Returns a string representation of the char classes stored in this class.Enumerates the classes by index.
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makeClass
public void makeClass(int singleChar, boolean caseless) Creates a new character class for the single charactersingleChar
.- Parameters:
singleChar
- character.caseless
- if true upper/lower/title case are considered equivalent
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makeClass
Creates a new character class for each character of the specified String.- Parameters:
str
- set of characters.caseless
- if true upper/lower/title case are considered equivalent
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makeClass
Updates the current partition, so that the specified set of characters gets a new character class.Characters that are elements of the set
l
are not in the same equivalence class with characters that are not elements of the setl
.- Parameters:
l
- a List of Interval objects. This List represents a set of characters. The set of characters is the union of all intervals in the List.caseless
- if true upper/lower/title case are considered equivalent
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makeClassNot
Updates the current partition, so that the set of all characters not contained in the specified set of characters gets a new character class.Characters that are elements of the set
v
are not in the same equivalence class with characters that are not elements of the setv
.This method is equivalent to
makeClass(v)
- Parameters:
l
- a List of Interval objects. This List represents a set of characters. The set of characters is the union of all intervals in the List.caseless
- if true upper/lower/title case are considered equivalent
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getClassCodes
Returns an array that contains the character class codes of all characters in the specified set of input characters. -
getClassCodes
Returns an array that contains the character class codes of all characters in the specified set of input characters.- Parameters:
intervalList
- a List of Intervals, the set of characters to get the class codes for- Returns:
- an array with the class codes for intervalList
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getNotClassCodes
Returns an array that contains the character class codes of all characters that are not in the specified set of input characters.- Parameters:
intervalList
- a List of Intervals, the complement of the set of characters to get the class codes for- Returns:
- an array with the class codes for the complement of intervalList
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check
public void check()Check consistency of the stored classes [debug].all classes must be disjoint, checks if all characters have a class assigned.
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getIntervals
Returns an array of all CharClassIntervals in this char class collection.The array is ordered by char code, i.e.
result[i+1].start = result[i].end+1
Each CharClassInterval contains the number of the char class it belongs to.- Returns:
- an array of all
CharClassInterval
in this char class collection.
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