Look at this code: QueryTermExtractor.getTerms(Query query)
http://lucene.apache.org/core/3_6_0/api/contrib-highlighter/org/apache/lucene/search/highlight/QueryTermExtractor.html
-- Jack Krupansky
-----Original Message-----
From: Ilya Zavorin
Sent: Thursday, June 14, 2012 2:36 PM
To: java-user@lucene.apache.org
Subject: RE: need to find locations of query hits in doc: works fine for
regular text but not for phone numbers
Uwe, sorry but I am having trouble understanding this. Can you point me to a
place in documentation that explains this in more detail (I've read
http://lucene.apache.org/core/old_versioned_docs/versions/3_4_0/api/core/org/apache/lucene/queryParser/QueryParser.html
but still am confused) or some example code?
Thanks much,
Ilya
-----Original Message-----
From: Uwe Schindler [mailto:u...@thetaphi.de]
Sent: Thursday, June 14, 2012 12:57 PM
To: java-user@lucene.apache.org
Subject: RE: need to find locations of query hits in doc: works fine for
regular text but not for phone numbers
Just take the BooleanQuery returned by the QueryParser and get its clauses
(sub-queries like TermQuery, PhraseQuery, other BooleanQuery...). By that
you get all query components. In most cases some recursive instanceof
checking for various Query subclasses can do this.
Uwe
-----
Uwe Schindler
H.-H.-Meier-Allee 63, D-28213 Bremen
http://www.thetaphi.de
eMail: u...@thetaphi.de
-----Original Message-----
From: Ilya Zavorin [mailto:izavo...@caci.com]
Sent: Thursday, June 14, 2012 6:49 PM
To: java-user@lucene.apache.org
Subject: RE: need to find locations of query hits in doc: works fine
for
regular
text but not for phone numbers
OK, so I figured out what the problem was. It wasn't with the digits
but
rather
with the various delimiters like "(" and "-" that I use.
Essentially, the statement
String[] subTerms = qstr.split("\\s+");
Does not split a query the same way as the query parser would do it.
And thanks, query.toString(), helped me see that.
My question now is this: is there a way of easily extracting a
sequence of substrings from query to use in place of the subTerms
array I get from
split?
I see that sometimes query.toString() returns things like
"contents:800 contents:555 contents:1212"
but other times it's somehting like
"contents:800 (contents:555 contents:1212)"
So instead of trying to guess what other formats query.toString can
produce
and trying to parse those, can I somehow extract the substrings of the
query
reliably?
Thanks!
-----Original Message-----
From: Jack Krupansky [mailto:j...@basetechnology.com]
Sent: Wednesday, June 13, 2012 11:42 PM
To: java-user@lucene.apache.org
Subject: Re: need to find locations of query hits in doc: works fine
for
regular
text but not for phone numbers
Try putting the phone number in quotes in the query:
String qstr = "\"800-555-1212\"";
And check query.toString to see how the query parser analyzed the
term,
bot
with and without quotes.
And make sure you initialized the query parser with "contents" as the
default
field.
-- Jack Krupansky
-----Original Message-----
From: Ilya Zavorin
Sent: Wednesday, June 13, 2012 10:52 PM
To: java-user@lucene.apache.org
Subject: need to find locations of query hits in doc: works fine for
regular text
but not for phone numbers
Hello All,
I am using 3.4. I need to find locations of query hits in a document.
What
I've
implemented works fine for textual queries but does not work for phone
numbers.
Here's how I index my docs:
String oc = "Joe dialed 800-555-1212 but got a busy signal";
doc.add(new Field("contents", oc, Field.Store.NO,
Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS));
Now, here how I find locations. I search for a query. If I get a hit,
I
split my
query (in case it's multi-word) into words and search for each of them
using
TermFreqVector like this:
//String qstr = "my multiword query"; // for queries like this it
works
fine...
String qstr = "800-555-1212"; // ...but not for ones like this Query
query
=
parser.parse(qstr); TopDocs results = searcher.search(query,
Integer.MAX_VALUE); ScoreDoc[] hits = results.scoreDocs;
String[] subTerms = qstr.split("\\s+"); // phone string stays intact
here
for (int i = 0; i < hits.length; i++) { int docId = hits[i].doc;
Document doc = searcher.doc(docId);
TermFreqVector tfvector = reader.getTermFreqVector(docId, "contents");
TermPositionVector tpvector = (TermPositionVector)tfvector;
for (String subTerm : subTerms)
{
String subq = subTerm.toLowerCase();
int termidx = tfvector.indexOf(subq); // get termidx = -1 here
TermVectorOffsetInfo[] tvoffsetinfo = tpvector.getOffsets(termidx);
for (int j=0;j<tvoffsetinfo.length;j++) {
int offsetStart = tvoffsetinfo[j].getStartOffset();
int offsetEnd = tvoffsetinfo[j].getEndOffset(); // ...
For a query like "800-555-1212", tfvector.indexOf returns -1. What am
I
doing
wrong?
Thanks,
Ilya Zavorin
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