EDIT

import org.neo4j.graphdb.Node;

import org.neo4j.graphdb.index.AutoIndexer;

import org.neo4j.graphdb.index.IndexHits;

import com.tinkerpop.blueprints.impls.neo4j2.Neo4j2Graph;

import com.tinkerpop.blueprints.impls.neo4j2.Neo4j2Vertex;

    /**

     * by using the Neo4j index directly it is possible to

     * take full advantage of the underlying Lucene search engine

     *

     * @param luceneQuery

     * @return

     */

    public ArrayList<Vertex> vertexIndexQuery(String luceneQuery) {

        Neo4j2Graph graph = (Neo4j2Graph)graph();

        AutoIndexer<Node> nodeAutoIndex = graph.getRawGraph().index().getNodeAutoIndexer();

        IndexHits<Node> nodes = nodeAutoIndex.getAutoIndex().query(luceneQuery);

        ArrayList<Vertex> hitVs = new ArrayList<Vertex>();

        while(nodes.hasNext()) {

            hitVs.add(new Neo4j2Vertex(nodes.next(), graph));

        }

        return hitVs;

    }