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java.lang.Objectorg.apache.lucene.analysis.Analyzer
org.apache.lucene.analysis.query.QueryAutoStopWordAnalyzer
public class QueryAutoStopWordAnalyzer
Field Summary | |
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static float |
defaultMaxDocFreqPercent
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Constructor Summary | |
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QueryAutoStopWordAnalyzer(Analyzer delegate)
Initializes this analyzer with the Analyzer object that actual produces the tokens |
Method Summary | |
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int |
addStopWords(IndexReader reader)
Automatically adds stop words for all fields with terms exceeding the defaultMaxDocFreqPercent |
int |
addStopWords(IndexReader reader,
float maxPercentDocs)
Automatically adds stop words for all fields with terms exceeding the maxDocFreqPercent |
int |
addStopWords(IndexReader reader,
int maxDocFreq)
Automatically adds stop words for all fields with terms exceeding the maxDocFreqPercent |
int |
addStopWords(IndexReader reader,
java.lang.String fieldName,
float maxPercentDocs)
Automatically adds stop words for the given field with terms exceeding the maxPercentDocs |
int |
addStopWords(IndexReader reader,
java.lang.String fieldName,
int maxDocFreq)
Automatically adds stop words for the given field with terms exceeding the maxPercentDocs |
Term[] |
getStopWords()
Provides information on which stop words have been identified for all fields |
java.lang.String[] |
getStopWords(java.lang.String fieldName)
Provides information on which stop words have been identified for a field |
TokenStream |
tokenStream(java.lang.String fieldName,
java.io.Reader reader)
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Methods inherited from class org.apache.lucene.analysis.Analyzer |
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getPositionIncrementGap, getPreviousTokenStream, reusableTokenStream, 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 float defaultMaxDocFreqPercent
Constructor Detail |
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public QueryAutoStopWordAnalyzer(Analyzer delegate)
delegate
- The choice of analyzer that is used to produce the token stream which needs filteringMethod Detail |
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public int addStopWords(IndexReader reader) throws java.io.IOException
reader
- The IndexReader class which will be consulted to identify potential stop words that
exceed the required document frequency
java.io.IOException
public int addStopWords(IndexReader reader, int maxDocFreq) throws java.io.IOException
reader
- The IndexReader class which will be consulted to identify potential stop words that
exceed the required document frequencymaxDocFreq
- The maximum number of index documents which can contain a term, after which
the term is considered to be a stop word
java.io.IOException
public int addStopWords(IndexReader reader, float maxPercentDocs) throws java.io.IOException
reader
- The IndexReader class which will be consulted to identify potential stop words that
exceed the required document frequencymaxPercentDocs
- The maximum percentage (between 0.0 and 1.0) of index documents which
contain a term, after which the word is considered to be a stop word.
java.io.IOException
public int addStopWords(IndexReader reader, java.lang.String fieldName, float maxPercentDocs) throws java.io.IOException
reader
- The IndexReader class which will be consulted to identify potential stop words that
exceed the required document frequencyfieldName
- The field for which stopwords will be addedmaxPercentDocs
- The maximum percentage (between 0.0 and 1.0) of index documents which
contain a term, after which the word is considered to be a stop word.
java.io.IOException
public int addStopWords(IndexReader reader, java.lang.String fieldName, int maxDocFreq) throws java.io.IOException
reader
- The IndexReader class which will be consulted to identify potential stop words that
exceed the required document frequencyfieldName
- The field for which stopwords will be addedmaxDocFreq
- The maximum number of index documents which
can contain a term, after which the term is considered to be a stop word.
java.io.IOException
public TokenStream tokenStream(java.lang.String fieldName, java.io.Reader reader)
tokenStream
in class Analyzer
public java.lang.String[] getStopWords(java.lang.String fieldName)
fieldName
- The field for which stop words identified in "addStopWords"
method calls will be returned
public Term[] getStopWords()
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