public final class PersianAnalyzer
extends org.apache.lucene.analysis.StopwordAnalyzerBase
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.
Modifier and Type | Field and Description |
---|---|
static java.lang.String |
DEFAULT_STOPWORD_FILE
File containing default Persian stopwords.
|
static java.lang.String |
STOPWORDS_COMMENT
The comment character in the stopwords file.
|
Constructor and Description |
---|
PersianAnalyzer(org.apache.lucene.util.Version matchVersion)
Builds an analyzer with the default stop words:
DEFAULT_STOPWORD_FILE . |
PersianAnalyzer(org.apache.lucene.util.Version matchVersion,
java.io.File stopwords)
Deprecated.
use
PersianAnalyzer(Version, Set) instead |
PersianAnalyzer(org.apache.lucene.util.Version matchVersion,
java.util.Hashtable<?,?> stopwords)
Deprecated.
use
PersianAnalyzer(Version, Set) instead |
PersianAnalyzer(org.apache.lucene.util.Version matchVersion,
java.util.Set<?> stopwords)
Builds an analyzer with the given stop words
|
PersianAnalyzer(org.apache.lucene.util.Version matchVersion,
java.lang.String... stopwords)
Deprecated.
use
PersianAnalyzer(Version, Set) instead |
Modifier and Type | Method and Description |
---|---|
protected org.apache.lucene.analysis.ReusableAnalyzerBase.TokenStreamComponents |
createComponents(java.lang.String fieldName,
java.io.Reader reader)
Creates
ReusableAnalyzerBase.TokenStreamComponents
used to tokenize all the text in the provided Reader . |
static java.util.Set<?> |
getDefaultStopSet()
Returns an unmodifiable instance of the default stop-words set.
|
protected java.io.Reader |
initReader(java.io.Reader reader)
Wraps the Reader with
PersianCharFilter |
getStopwordSet, loadStopwordSet, loadStopwordSet, loadStopwordSet
reusableTokenStream, tokenStream
public static final java.lang.String DEFAULT_STOPWORD_FILE
public static final java.lang.String STOPWORDS_COMMENT
public PersianAnalyzer(org.apache.lucene.util.Version matchVersion)
DEFAULT_STOPWORD_FILE
.public PersianAnalyzer(org.apache.lucene.util.Version matchVersion, java.util.Set<?> stopwords)
matchVersion
- lucene compatibility versionstopwords
- a stopword set@Deprecated public PersianAnalyzer(org.apache.lucene.util.Version matchVersion, java.lang.String... stopwords)
PersianAnalyzer(Version, Set)
instead@Deprecated public PersianAnalyzer(org.apache.lucene.util.Version matchVersion, java.util.Hashtable<?,?> stopwords)
PersianAnalyzer(Version, Set)
instead@Deprecated public PersianAnalyzer(org.apache.lucene.util.Version matchVersion, java.io.File stopwords) throws java.io.IOException
PersianAnalyzer(Version, Set)
insteadSTOPWORDS_COMMENT
java.io.IOException
public static java.util.Set<?> getDefaultStopSet()
protected org.apache.lucene.analysis.ReusableAnalyzerBase.TokenStreamComponents createComponents(java.lang.String fieldName, java.io.Reader reader)
ReusableAnalyzerBase.TokenStreamComponents
used to tokenize all the text in the provided Reader
.createComponents
in class org.apache.lucene.analysis.ReusableAnalyzerBase
ReusableAnalyzerBase.TokenStreamComponents
built from a StandardTokenizer
filtered with
LowerCaseFilter
, ArabicNormalizationFilter
,
PersianNormalizationFilter
and Persian Stop wordsprotected java.io.Reader initReader(java.io.Reader reader)
PersianCharFilter
initReader
in class org.apache.lucene.analysis.ReusableAnalyzerBase