C# 클래스 Lucene.Net.Analysis.Compound.Hyphenation.HyphenationTree

This tree structure stores the hyphenation patterns in an efficient way for fast lookup. It provides the provides the method to hyphenate a word. This class has been taken from the Apache FOP project (http://xmlgraphics.apache.org/fop/). They have been slightly modified.

상속: TernaryTree, PatternConsumer

파일 보기 프로젝트 열기: apache/lucenenet 1 사용 예제들

보호된 프로퍼티들

프로퍼티	타입	설명
classmap	TernaryTree
stoplist	IList
vspace	Lucene.Net.Analysis.Compound.Hyphenation.ByteVector

공개 메소드들

메소드	설명
AddClass ( string chargroup ) : void	Add a character class to the tree. It is used by PatternParser PatternParser as callback to add character classes. Character classes define the valid word characters for hyphenation. If a word contains a character not defined in any of the classes, it is not hyphenated. It also defines a way to normalize the characters in order to compare them with the stored patterns. Usually pattern files use only lower case characters, in this case a class for letter 'a', for example, should be defined as "aA", the first character being the normalization char.
AddException ( string word, List	Add an exception to the tree. It is used by PatternParser PatternParser class as callback to store the hyphenation exceptions.
AddPattern ( string pattern, string ivalue ) : void	Add a pattern to the tree. Mainly, to be used by PatternParser PatternParser class as callback to add a pattern to the tree.
FindPattern ( string pat ) : string
Hyphenate ( char w, int offset, int len, int remainCharCount, int pushCharCount ) : Hyphenation	Hyphenate word and return an array of hyphenation points.
Hyphenate ( string word, int remainCharCount, int pushCharCount ) : Hyphenation	Hyphenate word and return a Hyphenation object.
HyphenationTree ( ) : Lucene.Net.Support
LoadPatterns ( FileInfo f ) : void	Read hyphenation patterns from an XML file.
LoadPatterns ( FileInfo f, Encoding encoding ) : void	Read hyphenation patterns from an XML file.
LoadPatterns ( System.Stream source ) : void	Read hyphenation patterns from an XML file.
LoadPatterns ( System.Stream source, Encoding encoding ) : void	Read hyphenation patterns from an XML file.
LoadPatterns ( XmlReader source ) : void
LoadPatterns ( string filename ) : void	Read hyphenation patterns from an XML file.
LoadPatterns ( string filename, Encoding encoding ) : void	Read hyphenation patterns from an XML file.

보호된 메소드들

메소드	설명
GetValues ( int k ) : sbyte[]
HStrCmp ( char s, int si, char t, int ti ) : int	String compare, returns 0 if equal or t is a substring of s
PackValues ( string values ) : int	Packs the values by storing them in 4 bits, two values into a byte Values range is from 0 to 9. We use zero as terminator, so we'll add 1 to the value.
SearchPatterns ( char word, int index, sbyte il ) : void	Search for all possible partial matches of word starting at index an update interletter values. In other words, it does something like: `for(i=0; i<patterns.length; i++) { if ( word.substring(index).startsWidth(patterns[i]) ) update_interletter_values(patterns[i]); }` But it is done in an efficient way since the patterns are stored in a ternary tree. In fact, this is the whole purpose of having the tree: doing this search without having to test every single pattern. The number of patterns for languages such as English range from 4000 to 10000. Thus, doing thousands of string comparisons for each word to hyphenate would be really slow without the tree. The tradeoff is memory, but using a ternary tree instead of a trie, almost halves the the memory used by Lout or TeX. It's also faster than using a hash table
UnpackValues ( int k ) : string

메소드 상세

AddClass() 공개 메소드

Add a character class to the tree. It is used by PatternParser PatternParser as callback to add character classes. Character classes define the valid word characters for hyphenation. If a word contains a character not defined in any of the classes, it is not hyphenated. It also defines a way to normalize the characters in order to compare them with the stored patterns. Usually pattern files use only lower case characters, in this case a class for letter 'a', for example, should be defined as "aA", the first character being the normalization char.

public AddClass ( string chargroup ) : void
chargroup	string
리턴	void

AddException() 공개 메소드

Add an exception to the tree. It is used by PatternParser PatternParser class as callback to store the hyphenation exceptions.

public AddException ( string word, List
word	string	normalized word
hyphenatedword	List	a vector of alternating strings and /// objects.
리턴	void

AddPattern() 공개 메소드

Add a pattern to the tree. Mainly, to be used by PatternParser PatternParser class as callback to add a pattern to the tree.

public AddPattern ( string pattern, string ivalue ) : void
pattern	string	the hyphenation pattern
ivalue	string	interletter weight values indicating the desirability and /// priority of hyphenating at a given point within the pattern. It /// should contain only digit characters. (i.e. '0' to '9').
리턴	void

FindPattern() 공개 메소드

public FindPattern ( string pat ) : string
pat	string
리턴	string

GetValues() 보호된 메소드

protected GetValues ( int k ) : sbyte[]
k	int
리턴	sbyte[]

HStrCmp() 보호된 메소드

String compare, returns 0 if equal or t is a substring of s

protected HStrCmp ( char s, int si, char t, int ti ) : int
s	char
si	int
t	char
ti	int
리턴	int

Hyphenate() 공개 메소드

Hyphenate word and return an array of hyphenation points.

public Hyphenate ( char w, int offset, int len, int remainCharCount, int pushCharCount ) : Hyphenation
w	char	char array that contains the word
offset	int	Offset to first character in word
len	int	Length of word
remainCharCount	int	Minimum number of characters allowed before the /// hyphenation point.
pushCharCount	int	Minimum number of characters allowed after the /// hyphenation point.
리턴	Hyphenation

Hyphenate() 공개 메소드

Hyphenate word and return a Hyphenation object.

public Hyphenate ( string word, int remainCharCount, int pushCharCount ) : Hyphenation
word	string	the word to be hyphenated
remainCharCount	int	Minimum number of characters allowed before the /// hyphenation point.
pushCharCount	int	Minimum number of characters allowed after the /// hyphenation point.
리턴	Hyphenation