Toolkit - Export graph
From Gephi:Wiki
This Toolkit Example is part of the toolkit-demos project, that can be download from the website.
Demo
This demo focuses on Import and Export features, showing different IO possibilities. See Export API documentation and list of implemented Exporters.
Import can be performed from a file, database or Reader/InputStream. The export can be done to files and Writer/OutputStream. The demo import a file and shows how to configure graph export to use the visible graph instead of the full graph. That is essential to export a graph that has been filtered.
The ability to export graph or PDF to Writer or Byte array is showed at the end.
//Init a project - and therefore a workspace ProjectController pc = Lookup.getDefault().lookup(ProjectController.class); pc.newProject(); Workspace workspace = pc.getCurrentWorkspace(); //Get controllers and models ImportController importController = Lookup.getDefault().lookup(ImportController.class); //Import file Container container; try { File file = new File(getClass().getResource("/org/gephi/toolkit/demos/resources/lesmiserables.gml").toURI()); container = importController.importFile(file); container.getLoader().setEdgeDefault(EdgeDefault.DIRECTED); //Force DIRECTED container.setAllowAutoNode(false); //Don't create missing nodes } catch (Exception ex) { ex.printStackTrace(); return; } //Append imported data to GraphAPI importController.process(container, new DefaultProcessor(), workspace); //Export full graph ExportController ec = Lookup.getDefault().lookup(ExportController.class); try { ec.exportFile(new File("io_gexf.gexf")); } catch (IOException ex) { ex.printStackTrace(); return; } //Export only visible graph GraphExporter exporter = (GraphExporter) ec.getExporter("gexf"); //Get GEXF exporter exporter.setExportVisible(true); //Only exports the visible (filtered) graph exporter.setWorkspace(workspace); try { ec.exportFile(new File("io_gexf.gexf"), exporter); } catch (IOException ex) { ex.printStackTrace(); return; } //Export to Writer Exporter exporterGraphML = ec.getExporter("graphml"); //Get GraphML exporter exporterGraphML.setWorkspace(workspace); StringWriter stringWriter = new StringWriter(); ec.exportWriter(stringWriter, (CharacterExporter) exporterGraphML); //System.out.println(stringWriter.toString()); //Uncomment this line //PDF Exporter config and export to Byte array PDFExporter pdfExporter = (PDFExporter) ec.getExporter("pdf"); pdfExporter.setPageSize(PageSize.A0); pdfExporter.setWorkspace(workspace); ByteArrayOutputStream baos = new ByteArrayOutputStream(); ec.exportStream(baos, pdfExporter); byte[] pdf = baos.toByteArray();
