using NOT operator in apache lucene query and neo4j

[yi sun]

I just started to use neo4j and apache lucene,I have a requirement to allow users to use "NOT" operator on a single term. Since the NOT operator cannot be used with just one term, how can i achieve this?

I indexed my files using neo4j Indexing Framework,

	private GraphDatabaseService graphDb ;
	private Index<Node> index ;

        graphDb = new EmbeddedGraphDatabase( "C:\\neo4jdb" );
    	index = graphDb.index().forNodes( "file-index", MapUtil.stringMap( "provider", "lucene", "type", "fulltext" ) );

when constructing the query, I combined the NOT statement with MatchAllDocsQuery using the below code

 termquery=new TermQuery(new Term("title","big"));
 BooleanClause clause=new BooleanClause(termquery,Occur.MUST_NOT);
 nestedquery.add(clause);
 nestedquery.add(new BooleanClause(new MatchAllDocsQuery(), Occur.MUST));	

Then, I query the db using below code and a NullException occurs

IndexHits<Node> hits=index.query(nestedquery);

any help is appreciated.Thanks

[Peter Neubauer]

Hi there,
I am not sure about this one, but maybe you could post this question on the new Neo4j tender area? http://neo4j.tenderapp.com/discussions

/peter

[Campbell Ritchie]

Welcome to the Ranch

[Campbell Ritchie]

Not ab "beginning" question, so I have moved it. Not sure I have moved it to the right place, however. I would suggest you follow Peter Neubauer's suggestion, but make sure to inform us if you do.