Document parseDocument(String filename) throws Exception {
   FileReader reader = new FileReader(filename);
   String firstLine = new BufferedReader(reader).readLine();
   reader.close();
   Document document = null;
   if (firstLine.startsWith("<?xml")) {
     System.err.println("XML detected; using default XML parser.");
   } else {
     try {
       Class nekoParserClass = Class.forName("org.cyberneko.html.parsers.DOMParser");
       Object parser = nekoParserClass.newInstance();
       Method parse = nekoParserClass.getMethod("parse", new Class[] {String.class});
       Method getDocument = nekoParserClass.getMethod("getDocument", new Class[0]);
       parse.invoke(parser, filename);
       document = (Document) getDocument.invoke(parser);
     } catch (Exception e) {
       System.err.println("NekoHTML HTML parser not found; HTML4 support disabled.");
     }
   }
   if (document == null) {
     DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
     try { // http://www.w3.org/blog/systeam/2008/02/08/w3c_s_excessive_dtd_traffic
       factory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
     } catch (ParserConfigurationException e) {
       System.err.println("Warning: Could not disable external DTD loading");
     }
     DocumentBuilder builder = factory.newDocumentBuilder();
     document = builder.parse(filename);
   }
   return document;
 }
コード例 #2
0
ファイル: CircuitUI.java プロジェクト: nbenoit/giraffe
  /**
   * XML Circuit constructor
   *
   * @param file the file that contains the XML description of the circuit
   * @param g the graphics that will paint the node
   * @throws CircuitLoadingException if the internal circuit can not be loaded
   */
  public CircuitUI(File file, Graphics g) throws CircuitLoadingException {
    this("");

    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder;
    Document doc;
    Element root;

    Hashtable<Integer, Link> linkstable = new Hashtable<Integer, Link>();

    try {
      builder = factory.newDocumentBuilder();
      doc = builder.parse(file);
    } catch (SAXException sxe) {
      throw new CircuitLoadingException("SAX exception raised, invalid XML file.");
    } catch (ParserConfigurationException pce) {
      throw new CircuitLoadingException(
          "Parser exception raised, parser configuration is invalid.");
    } catch (IOException ioe) {
      throw new CircuitLoadingException("I/O exception, file cannot be loaded.");
    }

    root = (Element) doc.getElementsByTagName("Circuit").item(0);
    this.setName(root.getAttribute("name"));

    NodeList nl = root.getElementsByTagName("Node");
    Element e;
    Node n;
    Class cl;

    for (int i = 0; i < nl.getLength(); ++i) {
      e = (Element) nl.item(i);

      try {
        cl = Class.forName(e.getAttribute("class"));
      } catch (Exception exc) {
        System.err.println(exc.getMessage());
        throw new RuntimeException("Circuit creation from xml.");
      }

      try {
        n = ((Node) cl.newInstance());
      } catch (Exception exc) {
        System.err.println(exc.getMessage());
        throw new RuntimeException("Circuit creation from xml.");
      }

      this.nodes.add(n);
      n.setLocation(new Integer(e.getAttribute("x")), new Integer(e.getAttribute("y")));

      if (n instanceof giraffe.ui.Nameable) ((Nameable) n).setNodeName(e.getAttribute("node_name"));

      if (n instanceof giraffe.ui.CompositeNode) {
        try {
          ((CompositeNode) n)
              .load(new File(file.getParent() + "/" + e.getAttribute("file_name")), g);
        } catch (Exception exc) {
          /* try to load from the lib */
          ((CompositeNode) n)
              .load(new File(giraffe.Giraffe.PATH + "/lib/" + e.getAttribute("file_name")), g);
        }
      }

      NodeList nlist = e.getElementsByTagName("Anchor");
      Element el;

      for (int j = 0; j < nlist.getLength(); ++j) {
        el = (Element) nlist.item(j);

        Anchor a = n.getAnchor(new Integer(el.getAttribute("id")));
        NodeList linklist = el.getElementsByTagName("Link");
        Element link;
        Link l;

        for (int k = 0; k < linklist.getLength(); ++k) {
          link = (Element) linklist.item(k);
          int id = new Integer(link.getAttribute("id"));
          int index = new Integer(link.getAttribute("index"));

          if (id >= this.linkID) linkID = id + 1;

          if (linkstable.containsKey(id)) {
            l = linkstable.get(id);
            l.addLinkedAnchorAt(a, index);
            a.addLink(l);
          } else {
            l = new Link(id);
            l.addLinkedAnchorAt(a, index);
            this.links.add(l);
            linkstable.put(id, l);
            a.addLink(l);
          }
        }
      }
    }
  }