Hello everybody,
I am currently experimenting with Lucene 4.0 and would like to add payloads.
Payload should only be added once per term on the first position. My current
code looks like this:
public final boolean incrementToken() throws java.io.IOException {
String term = characterAttr.toString();
if (!input.incrementToken()) {
return false;
}
// hmh contains all terms for one document
if(hmh.checkKey(term)){ // check if hashmap contains term
Payload payload = new Payload(hmh.getCompressedData(term));
//get
payload data
payloadAttr.setPayload(payload); // add payload
hmh.removeFromIndexingMap(term); // remove term from
hashmap
}
return true;
}
Is this a correct way for adding payloads in Lucene 4.0? When I try to
receive payloads I am not getting payload on the first position. For getting
payloads I use this:
DocsAndPositionsEnum tp = MultiFields.getTermPositionsEnum(ir,
MultiFields.getDeletedDocs(ir), fieldName,
new BytesRef(searchString));
while (tp.nextDoc() != tp.NO_MORE_DOCS) {
if (tp.hasPayload() && counter < 10) {
Document doc = ir.document(tp.docID());
BytesRef br = tp.getPayload();
System.out.println("Found payload \"" +
br.utf8ToString() + "\" for
document " +
tp.docID() + " and query " +
searchString + " in country " +
doc.get("country"));
}
}
As far as I know there are two possibilities to use payloads
1) During similarity scoring
2) During search
Is there a better/faster way to receive payloads during search? Is it
possible to run a normal query and read the payloads from hits? Is 1 or 2
the faster way to use payloads? Can I find somewhere example code for Lucene
and loading payloads?
Regards
Alex
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