Hey Jeff!
Storey, Jeff schrieb:
Could you explain what you did for your solution? This is a problem I'm currently facing as well. But, for example, if
the user searches for "head~" would you also be able to highlight "read" and "dead" if
they are returned or just "head" without the ~.
It is necessary to give a "native" query to the QueryScorer (only
Boolean operators). Therefore I just took the an IndexWriter object and
used its public method rewrite(query).
Here the code:
QueryParser queryParser = new QueryParser(
ConstantsRetrieval.FIELD_DOC_CONTENT, new EMRAnalyzer());
String formattedText = null;
try {
// for the usage of highlighting with wildcards
Query query =
indexSearcher.rewrite(queryParser.parse(searchParameter.getUserQuery()));
QueryScorer queryScorer = new QueryScorer(query);
//logger.debug("User Query: " + query.toString());
SimpleHTMLFormatter formatter = new SimpleHTMLFormatter(
"<span class=\"highlight\">", "</span>");
Highlighter highlighter = new Highlighter(formatter,
queryScorer);
Fragmenter fragmenter = new SimpleFragmenter(100);
highlighter.setTextFragmenter(fragmenter);
TokenStream tokenStream = new EMRAnalyzer().
tokenStream(ConstantsRetrieval.FIELD_DOC_CONTENT, new
StringReader(text));
formattedText = highlighter.getBestFragments(tokenStream,
text, 5, "...");
//logger.debug("Formatted Text: \n" + formattedText);
FileWriter writer = new FileWriter(
"D:/development/iremr/text/highlightedDoc.html");
writer.write("<html>");
writer.write("<style>\n" +
".highlight {\n" +
" background: yellow;\n" +
"}\n" +
"</style>");
writer.write("<body>");
writer.write(formattedText);
writer.write("</body></html>");
writer.close();
} catch (ParseException e) {
logger.error("Not able to parse query\n" + e.getMessage());
return null;
} catch (IOException e) {
logger.error("IO-Exception in highlighting" + e.getMessage());
return null;
}
Stephan
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