Пример #1
0
 private StructureType assignStructureType(Element structure) throws VisualizerLoadException {
   String name = structure.getName().toLowerCase();
   if (name.compareTo("graph") == 0) {
     if (structure.getAttributeValue("weighted").compareTo("true") == 0)
       return new Graph_Network("NETWORK");
     else return new Graph_Network("GRAPH");
   } else if (name.equals("array")) return new MD_Array();
   else if (name.equals("no3darray")) return new No3darray();
   else if (name.equals("linkedlist")) return new VisLinkedList();
   else if (name.equals("no3dlinkedlist")) return new No3dLinkedList();
   else if (name.equals("linkedlistnonull")) return new VisLinkedListNoNull();
   else if (name.equals("bargraph")) return new BarScat("BAR");
   else if (name.equals("scattergraph"))
     return new BarScat(
         "SCAT"); // not implemented in xml dtd, and does not have a load-from-xml method defined
   else if (name.equals("stack")) return new Stack();
   else if (name.equals("queue")) return new Queue();
   else if (name.equals("tree")) {
     if (structure.getChild("binary_node") != null) return new BinaryTree();
     else return new GeneralTree();
   } else if (name.equals("text")) return new TextStructure();
   // if the XML element name is different from your structure's name, you can do something like
   // this:
   // 	else if( name.equalsIgnoreCase("node"))
   // 	    return new Node();
   else if (name.equals("legend")) return new LegendofColors();
   else {
     // try dynamic typing
     try {
       return assignStructureType(name);
     } catch (Exception e) {
       throw new VisualizerLoadException(
           "Unable to instantiate class \"" + name + "\":\n" + e.getMessage());
     }
   }
 }
Пример #2
0
  private /*synchronized*/ void readQuestions(StringTokenizer st) throws VisualizerLoadException {
    String tmpStr =
        "STARTQUESTIONS\n"; // When CG's QuestionFactory parses from a string, it looks for
    // a line with STARTQUESTIONS -- hence we add it artificially here
    try { // Build the string for the QuestionFactory
      while (st.hasMoreTokens()) {
        tmpStr += st.nextToken() + "\n";
      }
    } catch (Exception e) {
      e.printStackTrace();
      throw new VisualizerLoadException("Ooof!  bad question format");
    }

    try {
      // System.out.println(tmpStr);
      // Problem -- must make this be line oriented
      GaigsAV.questionCollection = QuestionFactory.parseScript(tmpStr);
    } catch (QuestionParseException e) {
      e.printStackTrace();
      System.out.println("Error parsing questions.");
      throw new VisualizerLoadException("Ooof!  bad question format");
      // throw new IOException();
    }
  } // readQuestions(st)