On Tue, 2012-12-04 at 17:30 +0530, madan mp wrote:
> I am working with lucene 3.6 ,I am trying to use the highlighter 3.6 in my
> search engine code, can you pls provide me full code for highlighting the
> terms....pls..pls
>
>
> regards
> madan
Hi,
not a complete example, but you can play around it...
final String preTag = "<strong>";
final String postTag = "</strong>";
final SimpleHTMLFormatter formatter = new SimpleHTMLFormatter(preTag,
postTag);
final Analyzer a = <your analyzer>
final int fragSize = 10;
final int fragNum = 3;
QueryScorer scorer = null;
try {
Query q = p.parse("query");
scorer = new QueryScorer(q, fieldName);
} catch (final Exception e) {
logger.debug("Error creating scorer (problem parsing query terms?)",
e);
return orig; // ?? error
}
final Highlighter h = new Highlighter(formatter, scorer);
Fragmenter fragmenter = new SimpleFragmenter(fragSize);
h.setTextFragmenter(fragmenter);
String[] fragments;
try {
final CachingTokenFilter tokenStream = new
CachingTokenFilter(a.tokenStream(fieldName, new StringReader(orig)));
fragments = h.getBestFragments(tokenStream, orig, fragNum);
if (fragments.length > 0) {
StringBuilder sb = new StringBuilder();
for(int idx = 0; idx < fragments.length; idx++) {
String fragment = fragments[idx];
sb.append(fragment);
}
return sb.toString();
}
} catch (IOException e) {
logger.error("Error obtaining best fragment", e);
} catch (InvalidTokenOffsetsException e) {
logger.error("Error obtaining best fragment", e);
}
Nicola.
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