Closeable
, AutoCloseable
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 | Description |
---|---|---|
static String |
DEFAULT_STOPWORD_FILE |
File containing default Persian stopwords.
|
static String |
STOPWORDS_COMMENT |
The comment character in the stopwords file.
|
Constructor | 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,
File stopwords) |
Deprecated.
use
PersianAnalyzer(Version, Set) instead |
PersianAnalyzer(org.apache.lucene.util.Version matchVersion,
String... stopwords) |
Deprecated.
use
PersianAnalyzer(Version, Set) instead |
PersianAnalyzer(org.apache.lucene.util.Version matchVersion,
Hashtable<?,?> stopwords) |
Deprecated.
use
PersianAnalyzer(Version, Set) instead |
PersianAnalyzer(org.apache.lucene.util.Version matchVersion,
Set<?> stopwords) |
Builds an analyzer with the given stop words
|
Modifier and Type | Method | Description |
---|---|---|
protected org.apache.lucene.analysis.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 |
close, getOffsetGap, getPositionIncrementGap, getPreviousTokenStream, setPreviousTokenStream
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
public static final String DEFAULT_STOPWORD_FILE
public static final String STOPWORDS_COMMENT
public PersianAnalyzer(org.apache.lucene.util.Version matchVersion)
DEFAULT_STOPWORD_FILE
.public PersianAnalyzer(org.apache.lucene.util.Version matchVersion, Set<?> stopwords)
matchVersion
- lucene compatibility versionstopwords
- a stopword set@Deprecated public PersianAnalyzer(org.apache.lucene.util.Version matchVersion, String... stopwords)
PersianAnalyzer(Version, Set)
instead@Deprecated public PersianAnalyzer(org.apache.lucene.util.Version matchVersion, Hashtable<?,?> stopwords)
PersianAnalyzer(Version, Set)
instead@Deprecated public PersianAnalyzer(org.apache.lucene.util.Version matchVersion, File stopwords) throws IOException
PersianAnalyzer(Version, Set)
insteadSTOPWORDS_COMMENT
IOException
public static Set<?> getDefaultStopSet()
protected org.apache.lucene.analysis.ReusableAnalyzerBase.TokenStreamComponents createComponents(String fieldName, 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 Reader initReader(Reader reader)
PersianCharFilter
initReader
in class org.apache.lucene.analysis.ReusableAnalyzerBase
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