transformer.setOutputProperty(OutputKeys.MEDIA_TYPE, "text/xml")
            transformer.transform(new DOMSource(root), new StreamResult(stream))
        }
    }

    Document getDocument() {
        root
    }

    private Document parseSourceFile(File sourceFile) {
        documentBuilder().parse(sourceFile)
    }

    private DocumentBuilder documentBuilder() {

                                throw new RuntimeException(e);
                            }
                        }

                        @Override
                        public void setDocument(int docid) {
                            this.docId = docid;
                        }
                    };
                }

                @Override
                public boolean needs_score() {