- Made the code in the javadoc readable.

- Removed unnecessary import statement.
- Re-indented the whole class.


git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@149694 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Otis Gospodnetic 2002-02-21 21:41:53 +00:00
parent 6f968662e9
commit dabd5e449f
1 changed files with 27 additions and 27 deletions

View File

@ -55,44 +55,44 @@ package org.apache.lucene.analysis;
*/
import java.io.IOException;
import java.util.Hashtable;
/** Transforms the token stream as per the Porter stemming algorithm.
Note: the input to the stemming filter must already be in lower case,
/** Transforms the token stream as per the Porter stemming algorithm.
Note: the input to the stemming filter must already be in lower case,
so you will need to use LowerCaseFilter or LowerCaseTokenizer farther
down the Tokenizer chain in order for this to work properly!
To use this filter with other analyzers, you'll want to write an
Analyzer class that sets up the TokenStream chain as you want it.
down the Tokenizer chain in order for this to work properly!
<P>
To use this filter with other analyzers, you'll want to write an
Analyzer class that sets up the TokenStream chain as you want it.
To use this with LowerCaseTokenizer, for example, you'd write an
analyzer like this:
<P>
<PRE>
class MyAnalyzer extends Analyzer {
public final TokenStream tokenStream(String fieldName, Reader reader) {
return new PorterStemFilter(new LowerCaseTokenizer(reader));
}
}
}
</PRE>
*/
public final class PorterStemFilter extends TokenFilter {
private PorterStemmer stemmer;
private PorterStemmer stemmer;
public PorterStemFilter(TokenStream in) {
stemmer = new PorterStemmer();
input = in;
}
/** Returns the next input Token, after being stemmed */
public final Token next() throws IOException {
Token token = input.next();
if (token == null)
return null;
else {
String s = stemmer.stem(token.termText);
if (s != token.termText) // Yes, I mean object reference comparison here
token.termText = s;
return token;
public PorterStemFilter(TokenStream in) {
stemmer = new PorterStemmer();
input = in;
}
/** Returns the next input Token, after being stemmed */
public final Token next() throws IOException {
Token token = input.next();
if (token == null)
return null;
else {
String s = stemmer.stem(token.termText);
if (s != token.termText) // Yes, I mean object reference comparison here
token.termText = s;
return token;
}
}
}
}