public final class PorterStemFilter extends TokenFilter
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:
class MyAnalyzer extends Analyzer { public final TokenStream tokenStream(String fieldName, Reader reader) { return new PorterStemFilter(new LowerCaseTokenizer(reader)); } }
input
Constructor and Description |
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PorterStemFilter(TokenStream in) |
Modifier and Type | Method and Description |
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Token |
next(Token reusableToken)
Returns the next token in the stream, or null at EOS.
|
close, reset
next
public PorterStemFilter(TokenStream in)
public final Token next(Token reusableToken) throws java.io.IOException
TokenStream
This implicitly defines a "contract" between consumers (callers of this method) and producers (implementations of this method that are the source for tokens):
Token.clear()
before setting the fields in it & returning itTokenFilter
is considered a consumer.next
in class TokenStream
reusableToken
- a Token that may or may not be used to
return; this parameter should never be null (the callee
is not required to check for null before using it, but it is a
good idea to assert that it is not null.)java.io.IOException
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