2010/11/14 Samuel Feng <[email protected]> > Mattias, > > Thanks a lot. Please find my update in red. > > Thanks and Regards, > > Samuel > > 2010/11/14 Mattias Persson <[email protected]> > > > 2010/11/13 Samuel Feng <[email protected]> > > > > > Hi, > > > > > > I am new to neo4j. > > > > > > I am using a custom analyzer in index in order to support Chinese. > > > > > > chnIndex = this.graphDb.index().forNodes("product_chinese", > > > MapUtil.stringMap("analyzer", > > > "org.wltea.analyzer.lucene.IKAnalyzer")); > > > > > > Below is the usage of the IKAnalyzer in lucence. > > > > > > IndexSearcher isearcher = new IndexSearcher(directory); > > > isearcher.setSimilarity(new IKSimilarity()); // A custom > > Similarity > > > String word = "OLYMPUS 奥林巴斯 E-PL1 时尚白 微型4/3系统相机 套机 含14-42mm镜头"; > > > Query query = IKQueryParser.parse(fieldName, word ); // A custom > > > QueryParser > > > TopDocs topDocs = isearcher.search(query, 5); // Got the top 5 > > > System.out.println("Found " + topDocs.totalHits); > > > ScoreDoc[] scoreDocs = topDocs.scoreDocs; > > > for (int i = 0; i < topDocs.totalHits; i++) { > > > System.out.println(scoreDocs[i].score); // Got the score of each > > > matched doc > > > Document targetDoc = isearcher.doc(scoreDocs[i].doc); > > > System.out.println("Document content is " + > targetDoc.toString()); > > > } > > > > > > How can I use the query method of neo4j's indexing to implement > > > 1) Add my custom Similartiy implemtation > > > > > > > That would require new functionality, probably exposed as a configuration > > parameter "similarity":"org.wltea.analyzer.lucene.IKAnalyzer" or > something. > > > > Maybe QueryContext can also be used here? >
You're right, it can. So it'd be even easier to implement. > > > > > 2) The TopDocs interface can replaced by the iterator of IndexHits, > > right? > > > > > > > In a way, yes. Actually IndexHits wraps a Hits instance (from lucene > 2.x), > > since it gives all the hits back. To make use of TopDocs instead a method > > could be exposed via the QueryContext class. That's definately possible. > > > > > > > 3) Possible to get the score for each node in the IndexHits? > > > > > > > Would it be ok with an IndexHits#currentScore() method which could return > > the score of the most recently returned node from the IndexHits object? > > > > That is a good idea. Please let me know the schedule of implement this, > as > my team is looking forward to this feature. :) > I looked at how to implement these features and it seems rather easy and quick to do. I've started with score and TopDocs (so that you can ask to retrieve only the top N hits instead of all hits). All this may enter the M05 milestone. > > > > > > > > > Thank you for the help and time spent on this. > > > > > > > These are great ideas and I'd be happy to try and implement them. > > > > > > > > > > Samuel > > > _______________________________________________ > > > Neo4j mailing list > > > [email protected] > > > https://lists.neo4j.org/mailman/listinfo/user > > > > > > > > > > > -- > > Mattias Persson, [[email protected]] > > Hacker, Neo Technology > > www.neotechnology.com > > _______________________________________________ > > Neo4j mailing list > > [email protected] > > https://lists.neo4j.org/mailman/listinfo/user > > > _______________________________________________ > Neo4j mailing list > [email protected] > https://lists.neo4j.org/mailman/listinfo/user > -- Mattias Persson, [[email protected]] Hacker, Neo Technology www.neotechnology.com _______________________________________________ Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
