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java.lang.Object org.apache.lucene.analysis.Analyzer org.apache.lucene.analysis.ReusableAnalyzerBase org.apache.lucene.analysis.StopwordAnalyzerBase 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
Nested Class Summary |
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Nested classes/interfaces inherited from class org.apache.lucene.analysis.ReusableAnalyzerBase |
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ReusableAnalyzerBase.TokenStreamComponents |
Field Summary | |
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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.StopwordAnalyzerBase |
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matchVersion, stopwords |
Constructor Summary | |
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ArabicAnalyzer(Version matchVersion)
Builds an analyzer with the default stop words: DEFAULT_STOPWORD_FILE . |
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ArabicAnalyzer(Version matchVersion,
File stopwords)
Deprecated. use ArabicAnalyzer(Version, Set) instead |
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ArabicAnalyzer(Version matchVersion,
Hashtable<?,?> stopwords)
Deprecated. use ArabicAnalyzer(Version, Set) instead |
|
ArabicAnalyzer(Version matchVersion,
Set<?> stopwords)
Builds an analyzer with the given stop words |
|
ArabicAnalyzer(Version matchVersion,
Set<?> stopwords,
Set<?> stemExclusionSet)
Builds an analyzer with the given stop word. |
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ArabicAnalyzer(Version matchVersion,
String... stopwords)
Deprecated. use ArabicAnalyzer(Version, Set) instead |
Method Summary | |
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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. |
Methods inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase |
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getStopwordSet, loadStopwordSet |
Methods inherited from class org.apache.lucene.analysis.ReusableAnalyzerBase |
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initReader, reusableTokenStream, tokenStream |
Methods inherited from class org.apache.lucene.analysis.Analyzer |
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close, getOffsetGap, getPositionIncrementGap, getPreviousTokenStream, setPreviousTokenStream |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final String DEFAULT_STOPWORD_FILE
@Deprecated public static final String STOPWORDS_COMMENT
WordlistLoader.getWordSet(File, String)
directly
Constructor Detail |
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public ArabicAnalyzer(Version matchVersion)
DEFAULT_STOPWORD_FILE
.
public ArabicAnalyzer(Version matchVersion, Set<?> stopwords)
matchVersion
- lucene compatibility versionstopwords
- a stopword setpublic ArabicAnalyzer(Version matchVersion, Set<?> stopwords, Set<?> stemExclusionSet)
KeywordMarkerFilter
before
ArabicStemFilter
.
matchVersion
- lucene compatibility versionstopwords
- a stopword setstemExclusionSet
- a set of terms not to be stemmed@Deprecated public ArabicAnalyzer(Version matchVersion, String... stopwords)
ArabicAnalyzer(Version, Set)
instead
@Deprecated public ArabicAnalyzer(Version matchVersion, Hashtable<?,?> stopwords)
ArabicAnalyzer(Version, Set)
instead
@Deprecated public ArabicAnalyzer(Version matchVersion, File stopwords) throws IOException
ArabicAnalyzer(Version, Set)
instead
STOPWORDS_COMMENT
IOException
Method Detail |
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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 an StandardTokenizer
filtered with
LowerCaseFilter
, StopFilter
,
ArabicNormalizationFilter
, KeywordMarkerFilter
if a stem exclusion set is provided and ArabicStemFilter
.
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