Arne Arne - 23 days ago 9
Java Question

How to create nested boolean query with lucene API (a AND (b OR c))?

I have an indexed object with three fields (userId, title, description). I want to find all objects of a specific user where the title OR the description contains a given keyword.

I have something like this (but that's obviously wrong):

WildcardQuery nameQuery = new WildcardQuery(new Term("name", filter.getSearch()));
WildcardQuery descQuery = new WildcardQuery(new Term("description", filter.getSearch()));

TermQuery userQuery = new TermQuery(new Term("user_id", u.getId()+""));

BooleanQuery booleanQuery = new BooleanQuery();
booleanQuery.add(new BooleanClause(name_query, Occur.SHOULD));
booleanQuery.add(new BooleanClause(desc_query, Occur.SHOULD));
booleanQuery.add(new BooleanClause(user_query, Occur.MUST));


How wo modify the code to get all objects with the correct ID and the search phrase in title or description?

Answer Source

I think that it will be something like this:

TermQuery userQuery = new TermQuery(new Term("user_id", u.getId()+""));

BooleanQuery orQuery = new BooleanQuery();
orQuery.add(new BooleanClause(name_query, Occur.SHOULD));
orQuery.add(new BooleanClause(desc_query, Occur.SHOULD));

BooleanQuery andQuery = new BooleanQuery();
andQuery.add(new BooleanClause(userQuery , Occur.MUST));
andQuery.add(new BooleanClause(orQuery, Occur.MUST));