Hi All,
My name is Hayato.
I have a question for Highlighter.
I indexed following text and use Tokenizer.
text : abracadabra
Tokenizer: NGramAnalyzer
and requested following query
query : ab
expected result and actual result is following
expect : <B>ab</B>racad<B>ab</B>ra
actual : <B>abracadab</B>ra
To be more specific, i try this testcase, but failed.
is this behavior valid?
if valid, please teach me why this result...
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public static class NGramAnalyzer extends Analyzer {
int minGram;
int maxGram;
public NGramAnalyzer(int minGram, int maxGram) {
super();
this.maxGram = maxGram;
this.minGram = minGram;
}
public TokenStream tokenStream(String fieldName,
java.io.Reader reader) {
return new NGramTokenizer(reader, minGram,
maxGram);
}
}
@Test
public void testGetBestTextFragments2() throws
IOException, ParseException {
String CONTENT = "abracadabra";
String QUERY_STRING = "ab";
String F = "f";
Analyzer analyzer = new NGramAnalyzer(2,2);
TokenStream tokenStream =
analyzer.tokenStream("f", new StringReader(CONTENT));
QueryParser qp = new QueryParser(F, analyzer);
Query query = null;
query = qp.parse(QUERY_STRING);
Scorer scorer = new QueryScorer(query, F);
Highlighter h = new Highlighter(scorer);
Assert.assertEquals("<B>ab</B>racad<B>ab</B>ra",
h.getBestTextFragments(tokenStream, CONTENT, true,
10)[0].markedUpText
.toString());
}
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