*Hi all,*
**
*I wanted to use to following code to highlight the whole sentence with
"\"something\"~n" to be parsed.*
**
*The QueryParser part worked well, but when integrated with Highlighter, it
ended up with exception. *
**
*Does anyone have any clue as I'm investigating this.*
**
**
*Thanks,*
**
Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/lucene/index/memory/MemoryIndex
at
org.apache.lucene.search.highlight.WeightedSpanTermExtractor.getReaderForField(
*WeightedSpanTermExtractor.java:361*)
at
org.apache.lucene.search.highlight.WeightedSpanTermExtractor.extractWeightedSpanTerms(
*WeightedSpanTermExtractor.java:282*)
at
org.apache.lucene.search.highlight.WeightedSpanTermExtractor.extract(*
WeightedSpanTermExtractor.java:149*)
at
org.apache.lucene.search.highlight.WeightedSpanTermExtractor.getWeightedSpanTerms(
*WeightedSpanTermExtractor.java:414*)
at org.apache.lucene.search.highlight.QueryScorer.initExtractor(*
QueryScorer.java:216*)
at org.apache.lucene.search.highlight.QueryScorer.init(*
QueryScorer.java:184*)
at
org.apache.lucene.search.highlight.Highlighter.getBestTextFragments(*
Highlighter.java:226*)
at org.apache.lucene.search.highlight.Highlighter.getBestFragments(*
Highlighter.java:184*)
at org.apache.lucene.search.highlight.Highlighter.getBestFragments(*
Highlighter.java:488*)
at Hightlight.main(*Hightlight.java:182*)
**
*public* *class* Hightlight {
*private* *static* *final* String *text* =
"Giving end users some context around hits from their searches is
friendly and, more important, useful. An useful example is friendly Google
search context.";
*private* *static* *final* String[] *stopwords* = {};
*private* *static* IndexSearcher *searcher*;
*public* *static* *void* main(String[] args) *throws* Exception {
String filename = args[0];
String searchText = "\"Giving and\"~11";
#1
QueryParser parser = *new* QueryParser("f", *new*
StandardAnalyzer(*stopwords*));
Query query = parser.parse(searchText);
SimpleHTMLFormatter formatter =
*new* SimpleHTMLFormatter("<span class=\"highlight\">",
"</span>");
TokenStream tokens = *new* StandardAnalyzer(*stopwords*)
.tokenStream("f", *new* StringReader(*text*));
QueryScorer scorer = *new* QueryScorer(query, "f");
Highlighter highlighter = *new* Highlighter(formatter, scorer);
highlighter.setTextFragmenter(
*new* NullFragmenter());
String result =
highlighter.getBestFragments(tokens, *text*, 3, "...");
FileWriter writer = *new* FileWriter(filename);
writer.write("<html>");
writer.write("<style>\n" +
".highlight {\n" +
" background: yellow;\n" +
"}\n" +
"</style>");
writer.write("<body>");
writer.write(result);
writer.write("</body></html>");
writer.close();
}
}
