|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object org.apache.lucene.analysis.Analyzer org.apache.lucene.analysis.ReusableAnalyzerBase org.apache.lucene.analysis.StopwordAnalyzerBase org.apache.lucene.analysis.fa.PersianAnalyzer
public final class PersianAnalyzer
Analyzer
for Persian.
This Analyzer uses ArabicLetterTokenizer
which implies tokenizing around
zero-width non-joiner in addition to whitespace. Some persian-specific variant forms (such as farsi
yeh and keheh) are standardized. "Stemming" is accomplished via stopwords.
Nested Class Summary |
---|
Nested classes/interfaces inherited from class org.apache.lucene.analysis.ReusableAnalyzerBase |
---|
ReusableAnalyzerBase.TokenStreamComponents |
Field Summary | |
---|---|
static String |
DEFAULT_STOPWORD_FILE
File containing default Persian stopwords. |
static String |
STOPWORDS_COMMENT
The comment character in the stopwords file. |
Fields inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase |
---|
matchVersion, stopwords |
Constructor Summary | |
---|---|
PersianAnalyzer(Version matchVersion)
Builds an analyzer with the default stop words: DEFAULT_STOPWORD_FILE . |
|
PersianAnalyzer(Version matchVersion,
File stopwords)
Deprecated. use PersianAnalyzer(Version, Set) instead |
|
PersianAnalyzer(Version matchVersion,
Hashtable<?,?> stopwords)
Deprecated. use PersianAnalyzer(Version, Set) instead |
|
PersianAnalyzer(Version matchVersion,
Set<?> stopwords)
Builds an analyzer with the given stop words |
|
PersianAnalyzer(Version matchVersion,
String... stopwords)
Deprecated. use PersianAnalyzer(Version, Set) instead |
Method Summary | |
---|---|
protected ReusableAnalyzerBase.TokenStreamComponents |
createComponents(String fieldName,
Reader reader)
Creates ReusableAnalyzerBase.TokenStreamComponents
used to tokenize all the text in the provided Reader . |
static Set<?> |
getDefaultStopSet()
Returns an unmodifiable instance of the default stop-words set. |
protected Reader |
initReader(Reader reader)
Wraps the Reader with PersianCharFilter |
Methods inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase |
---|
getStopwordSet, loadStopwordSet |
Methods inherited from class org.apache.lucene.analysis.ReusableAnalyzerBase |
---|
reusableTokenStream, tokenStream |
Methods inherited from class org.apache.lucene.analysis.Analyzer |
---|
close, getOffsetGap, getPositionIncrementGap, getPreviousTokenStream, setPreviousTokenStream |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
public static final String DEFAULT_STOPWORD_FILE
public static final String STOPWORDS_COMMENT
Constructor Detail |
---|
public PersianAnalyzer(Version matchVersion)
DEFAULT_STOPWORD_FILE
.
public PersianAnalyzer(Version matchVersion, Set<?> stopwords)
matchVersion
- lucene compatibility versionstopwords
- a stopword set@Deprecated public PersianAnalyzer(Version matchVersion, String... stopwords)
PersianAnalyzer(Version, Set)
instead
@Deprecated public PersianAnalyzer(Version matchVersion, Hashtable<?,?> stopwords)
PersianAnalyzer(Version, Set)
instead
@Deprecated public PersianAnalyzer(Version matchVersion, File stopwords) throws IOException
PersianAnalyzer(Version, Set)
instead
STOPWORDS_COMMENT
IOException
Method Detail |
---|
public static Set<?> getDefaultStopSet()
protected ReusableAnalyzerBase.TokenStreamComponents createComponents(String fieldName, Reader reader)
ReusableAnalyzerBase.TokenStreamComponents
used to tokenize all the text in the provided Reader
.
createComponents
in class ReusableAnalyzerBase
fieldName
- the name of the fields content passed to the
ReusableAnalyzerBase.TokenStreamComponents
sink as a readerreader
- the reader passed to the Tokenizer
constructor
ReusableAnalyzerBase.TokenStreamComponents
built from a StandardTokenizer
filtered with
LowerCaseFilter
, ArabicNormalizationFilter
,
PersianNormalizationFilter
and Persian Stop wordsprotected Reader initReader(Reader reader)
PersianCharFilter
initReader
in class ReusableAnalyzerBase
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |