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## org.apache.lucene.analysis.de
Class GermanAnalyzer

    java.lang.Object
      org.apache.lucene.analysis.Analyzer
          org.apache.lucene.analysis.de.GermanAnalyzer

public class GermanAnalyzer
extends Analyzer

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, the exclusion list is empty by default.

Version:
  $Id: GermanAnalyzer.java,v 1.17 2004/07/10 06:19:01 otis Exp $
Author:
  Gerhard Schwarz

Constructor Summary
`GermanAnalyzer()` Builds an analyzer.
`GermanAnalyzer(File stopwords)` Builds an analyzer with the given stop words.
`GermanAnalyzer(Hashtable stopwords)` Builds an analyzer with the given stop words.
`GermanAnalyzer(String[] stopwords)` Builds an analyzer with the given stop words.

Method Summary
`void` | `setStemExclusionTable(File exclusionlist)` Builds an exclusionlist from the words contained in the given file.
`void` | `setStemExclusionTable(Hashtable exclusionlist)` Builds an exclusionlist from a Hashtable.
`void` | `setStemExclusionTable(String[] exclusionlist)` Builds an exclusionlist from an array of Strings.
`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
`tokenStream`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### GermanAnalyzer

    public GermanAnalyzer()

  Builds an analyzer.

### GermanAnalyzer

    public GermanAnalyzer(String[] stopwords)

  Builds an analyzer with the given stop words.

### GermanAnalyzer

    public GermanAnalyzer(Hashtable stopwords)

  Builds an analyzer with the given stop words.

### GermanAnalyzer

    public GermanAnalyzer(File stopwords)
                   throws IOException

  Builds an analyzer with the given stop words.

Method Detail

### setStemExclusionTable

    public void setStemExclusionTable(String[] exclusionlist)

  Builds an exclusionlist from an array of Strings.

### setStemExclusionTable

    public void setStemExclusionTable(Hashtable exclusionlist)

  Builds an exclusionlist from a Hashtable.

### setStemExclusionTable

    public void setStemExclusionTable(File exclusionlist)
                               throws IOException

  Builds an exclusionlist from the words contained in the given file.

  Throws:
    `IOException`

### tokenStream

    public TokenStream tokenStream(String fieldName,
                                   Reader reader)

  Creates a TokenStream which tokenizes all the text in the provided Reader.

  Overrides:
    `tokenStream` in class `Analyzer`
  Returns:
    A TokenStream build from a StandardTokenizer filtered with StandardFilter, LowerCaseFilter, StopFilter, GermanStemFilter

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