public Iterator listChildren()

in src/main/java/org/apache/sling/mongodb/impl/MongoDBResourceProvider.java [256:324]
59 lines of code
6 McCabe index (conditional complexity)

    public Iterator<Resource> listChildren(final Resource parent) {
        final String[] info = this.extractResourceInfo(parent.getPath());
        if ( info != null ) {
            if ( info.length == 0 ) {
                // all collections
                final Set<String> names = new HashSet<String>(context.getDatabase().getCollectionNames());
                names.removeAll(this.context.getFilterCollectionNames());
                final Iterator<String> i = names.iterator();
                return new Iterator<Resource>() {

                    public boolean hasNext() {
                        return i.hasNext();
                    }

                    public Resource next() {
                        final String name = i.next();
                        return new MongoDBCollectionResource(parent.getResourceResolver(), parent.getPath() + '/' + name);
                    }

                    public void remove() {
                        throw new UnsupportedOperationException("remove");
                    }

                };
            }
            final DBCollection col = this.getCollection(info[0]);
            if ( col != null ) {
                final String pattern;
                if ( info.length == 1 ) {
                    pattern = "^([^/])*$";
                } else {
                    pattern = "^" + Pattern.quote(info[1]) + "/([^/])*$";
                }

                final DBObject query = QueryBuilder.start(getPROP_PATH()).regex(Pattern.compile(pattern)).get();
                final DBCursor cur = col.find(query).
                        sort(BasicDBObjectBuilder.start(getPROP_PATH(), 1).get());
                return new Iterator<Resource>() {

                    public boolean hasNext() {
                        return cur.hasNext();
                    }

                    public Resource next() {
                        final DBObject obj = cur.next();
                        final String objPath = obj.get(getPROP_PATH()).toString();
                        final int lastSlash = objPath.lastIndexOf('/');
                        final String name;
                        if (lastSlash == -1) {
                            name = objPath;
                        } else {
                            name = objPath.substring(lastSlash + 1);
                        }
                        return new MongoDBResource(parent.getResourceResolver(),
                                parent.getPath() + '/' + name,
                                info[0],
                                obj,
                                MongoDBResourceProvider.this);
                    }

                    public void remove() {
                        throw new UnsupportedOperationException("remove");
                    }

                };
            }
        }
        return null;
    }