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java.lang.Object org.apache.lucene.analysis.Analyzer org.apache.lucene.analysis.ar.ArabicAnalyzer
public final class ArabicAnalyzer
Analyzer
for Arabic.
This analyzer implements light-stemming as specified by: Light Stemming for Arabic Information Retrieval http://www.mtholyoke.edu/~lballest/Pubs/arab_stem05.pdf
The analysis package contains three primary components:
ArabicNormalizationFilter
: Arabic orthographic normalization.
ArabicStemFilter
: Arabic light stemming
Field Summary | |
---|---|
static String |
DEFAULT_STOPWORD_FILE
File containing default Arabic stopwords. |
static String |
STOPWORDS_COMMENT
Deprecated. use WordlistLoader.getWordSet(File, String) directly |
Fields inherited from class org.apache.lucene.analysis.Analyzer |
---|
overridesTokenStreamMethod |
Constructor Summary | |
---|---|
ArabicAnalyzer(org.apache.lucene.util.Version matchVersion)
Builds an analyzer with the default stop words: DEFAULT_STOPWORD_FILE . |
|
ArabicAnalyzer(org.apache.lucene.util.Version matchVersion,
File stopwords)
Deprecated. use ArabicAnalyzer(Version, Set) instead |
|
ArabicAnalyzer(org.apache.lucene.util.Version matchVersion,
Hashtable<?,?> stopwords)
Deprecated. use ArabicAnalyzer(Version, Set) instead |
|
ArabicAnalyzer(org.apache.lucene.util.Version matchVersion,
Set<?> stopwords)
Builds an analyzer with the given stop words |
|
ArabicAnalyzer(org.apache.lucene.util.Version matchVersion,
String... stopwords)
Deprecated. use ArabicAnalyzer(Version, Set) instead |
Method Summary | |
---|---|
static Set<String> |
getDefaultStopSet()
Returns an unmodifiable instance of the default stop-words set. |
org.apache.lucene.analysis.TokenStream |
reusableTokenStream(String fieldName,
Reader reader)
Returns a (possibly reused) TokenStream which tokenizes all the text
in the provided Reader . |
org.apache.lucene.analysis.TokenStream |
tokenStream(String fieldName,
Reader reader)
Creates a TokenStream which tokenizes all the text in the provided Reader . |
Methods inherited from class org.apache.lucene.analysis.Analyzer |
---|
close, getOffsetGap, getPositionIncrementGap, getPreviousTokenStream, setOverridesTokenStreamMethod, 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
WordlistLoader.getWordSet(File, String)
directly
Constructor Detail |
---|
public ArabicAnalyzer(org.apache.lucene.util.Version matchVersion)
DEFAULT_STOPWORD_FILE
.
public ArabicAnalyzer(org.apache.lucene.util.Version matchVersion, Set<?> stopwords)
matchVersion
- lucene compatibility versionstopwords
- a stopword setpublic ArabicAnalyzer(org.apache.lucene.util.Version matchVersion, String... stopwords)
ArabicAnalyzer(Version, Set)
instead
public ArabicAnalyzer(org.apache.lucene.util.Version matchVersion, Hashtable<?,?> stopwords)
ArabicAnalyzer(Version, Set)
instead
public ArabicAnalyzer(org.apache.lucene.util.Version matchVersion, File stopwords) throws IOException
ArabicAnalyzer(Version, Set)
instead
STOPWORDS_COMMENT
IOException
Method Detail |
---|
public static Set<String> getDefaultStopSet()
public final org.apache.lucene.analysis.TokenStream tokenStream(String fieldName, Reader reader)
TokenStream
which tokenizes all the text in the provided Reader
.
tokenStream
in class org.apache.lucene.analysis.Analyzer
TokenStream
built from an ArabicLetterTokenizer
filtered with
LowerCaseFilter
, StopFilter
, ArabicNormalizationFilter
and ArabicStemFilter
.public org.apache.lucene.analysis.TokenStream reusableTokenStream(String fieldName, Reader reader) throws IOException
TokenStream
which tokenizes all the text
in the provided Reader
.
reusableTokenStream
in class org.apache.lucene.analysis.Analyzer
TokenStream
built from an ArabicLetterTokenizer
filtered with
LowerCaseFilter
, StopFilter
, ArabicNormalizationFilter
and ArabicStemFilter
.
IOException
|
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