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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.de.GermanAnalyzer
public final class GermanAnalyzer
Analyzer
for German language.
Supports an external list of stopwords (words that will not be indexed at all) and an external list of exclusions (word that will not be stemmed, but indexed). A default set of stopwords is used unless an alternative list is specified, but the exclusion list is empty by default.
You must specify the required Version
compatibility when creating GermanAnalyzer:
NOTE: This class uses the same Version
dependent settings as StandardAnalyzer
.
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 German stopwords. |
static String[] |
GERMAN_STOP_WORDS
Deprecated. use getDefaultStopSet() instead |
Fields inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase |
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matchVersion, stopwords |
Constructor Summary | |
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GermanAnalyzer(Version matchVersion)
Builds an analyzer with the default stop words: getDefaultStopSet() . |
|
GermanAnalyzer(Version matchVersion,
File stopwords)
Deprecated. use GermanAnalyzer(Version, Set) |
|
GermanAnalyzer(Version matchVersion,
Map<?,?> stopwords)
Deprecated. use GermanAnalyzer(Version, Set) |
|
GermanAnalyzer(Version matchVersion,
Set<?> stopwords)
Builds an analyzer with the given stop words |
|
GermanAnalyzer(Version matchVersion,
Set<?> stopwords,
Set<?> stemExclusionSet)
Builds an analyzer with the given stop words |
|
GermanAnalyzer(Version matchVersion,
String... stopwords)
Deprecated. use GermanAnalyzer(Version, Set) |
Method Summary | |
---|---|
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 a set of default German-stopwords |
void |
setStemExclusionTable(File exclusionlist)
Deprecated. use GermanAnalyzer(Version, Set, Set) instead |
void |
setStemExclusionTable(Map<?,?> exclusionlist)
Deprecated. use GermanAnalyzer(Version, Set, Set) instead |
void |
setStemExclusionTable(String[] exclusionlist)
Deprecated. use GermanAnalyzer(Version, Set, Set) instead |
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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@Deprecated public static final String[] GERMAN_STOP_WORDS
getDefaultStopSet()
instead
public static final String DEFAULT_STOPWORD_FILE
Constructor Detail |
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public GermanAnalyzer(Version matchVersion)
getDefaultStopSet()
.
public GermanAnalyzer(Version matchVersion, Set<?> stopwords)
matchVersion
- lucene compatibility versionstopwords
- a stopword setpublic GermanAnalyzer(Version matchVersion, Set<?> stopwords, Set<?> stemExclusionSet)
matchVersion
- lucene compatibility versionstopwords
- a stopword setstemExclusionSet
- a stemming exclusion set@Deprecated public GermanAnalyzer(Version matchVersion, String... stopwords)
GermanAnalyzer(Version, Set)
@Deprecated public GermanAnalyzer(Version matchVersion, Map<?,?> stopwords)
GermanAnalyzer(Version, Set)
@Deprecated public GermanAnalyzer(Version matchVersion, File stopwords) throws IOException
GermanAnalyzer(Version, Set)
IOException
Method Detail |
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public static final Set<?> getDefaultStopSet()
@Deprecated public void setStemExclusionTable(String[] exclusionlist)
GermanAnalyzer(Version, Set, Set)
instead
@Deprecated public void setStemExclusionTable(Map<?,?> exclusionlist)
GermanAnalyzer(Version, Set, Set)
instead
Map
@Deprecated public void setStemExclusionTable(File exclusionlist) throws IOException
GermanAnalyzer(Version, Set, Set)
instead
IOException
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 a StandardTokenizer
filtered with
StandardFilter
, LowerCaseFilter
, StopFilter
, KeywordMarkerFilter
if a stem exclusion set is
provided, and SnowballFilter
|
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