How to store a directory tree in the Neo4j Graph Database

gistfile1.java

    private static final RelationshipType SUB_DIR = DynamicRelationshipType.withName("SUB_DIR");
    
    public void storePath(String path) {
        Node dir = graphDb.getReferenceNode();
        for (String name : path.split(File.separator)) {
            dir = obtainSubDir(dir, name);
        }
    }
    
    private Node obtainSubDir(Node dir, String name) {
        Node subDir = getSubDir(dir,name);
        if (subDir!=null) return subDir;
        return createSubDir(dir, name);
    }
    
    private Node getSubDir(Node dir, String name) {
        for (Relationship rel : dir.getRelationships(SUB_DIR, Direction.OUTGOING)) {
            final Node subDir = rel.getEndNode();
            if (subDir.getProperty("name", "").equals(name)) return subDir;
        }
        return null;
    }
    
    private Node createSubDir(Node dir, String name) {
        Node subDir = dir.getGraphDatabase().createNode();
        subDir.setProperty("name", name);
        dir.createRelationshipTo(subDir, SUB_DIR);
        return subDir;
    }