Document extends OdfSchemaDocument implements TableContainer { @SuppressWarnings("unchecked") protected <T extends OdfElement> T getContentRoot(Class<T> clazz) throws Exception { OdfElement contentRoot = getContentDom().getRootElement(); OfficeBodyElement contentBody = OdfElement.findFirstChildNode(OfficeBodyElement.class, contentRoot); NodeList childs = contentBody.getChildNodes(); for (int i = 0; i < childs.getLength(); i++) { Node cur = childs.item(i); if ((cur != null) && clazz.isInstance(cur)) { return (T) cur; } } return null; } protected  Document(OdfPackage pkg, String internalPath, OdfMediaType mediaType); static Document loadDocument(String documentPath, String password); static Document loadDocument(String documentPath); static Document loadDocument(InputStream inStream); static Document loadDocument(File file); static Document loadDocument(File file, String password); static Document loadDocument(OdfPackage odfPackage); static Document loadDocument(OdfPackage odfPackage, String internalPath); void setPassword(String password); Document getEmbeddedDocument(String documentPath); List<Document> getEmbeddedDocuments(); List<Document> getEmbeddedDocuments(OdfMediaType mediaType); void insertDocument(OdfPackageDocument sourceDocument, String documentPath); Meta getOfficeMetadata(); void save(OutputStream out); void save(File file); void save(File file, String password); @Override void close(); OdfElement getContentRoot(); @Override String toString(); String newImage(URI imageUri); void setLocale(Locale locale); static ScriptType getScriptType(Locale locale); void setLocale(Locale locale, ScriptType scriptType); Locale getLocale(ScriptType scriptType); Iterator<Section> getSectionIterator(); Section getSectionByName(String name); boolean removeElementLinkedResource(OdfElement odfElement); Table addTable(); Table addTable(int numRows, int numCols); Table getTableByName(String name); java.util.List<Table> getTableList(); TableBuilder getTableBuilder(); TableTemplate LoadTableTemplateFromForeignTable(InputStream templateFileInputStream,
        String tableName);  }
@Test public void testGetContentRoot() { try { TextDocument odt = (TextDocument) Document.loadDocument(ResourceUtilities.getAbsolutePath(TEST_FILE_WITHOUT_OPT)); Assert.assertNotNull(odt.getContentRoot()); } catch (Exception e) { LOG.log(Level.SEVERE, e.getMessage(), e); Assert.fail(e.getMessage()); } }