Ejemplo n.º 1
0
    public TreeNode nextElement() {
      Enumeration enumer = stack.peek();
      TreeNode node = (TreeNode) enumer.nextElement();
      Enumeration children = node.children();

      if (!enumer.hasMoreElements()) {
        stack.pop();
      }
      if (children.hasMoreElements()) {
        stack.push(children);
      }
      return node;
    }
Ejemplo n.º 2
0
    public TreeNode nextElement() {
      Enumeration enumer = (Enumeration) queue.firstObject();
      TreeNode node = (TreeNode) enumer.nextElement();
      Enumeration children = node.children();

      if (!enumer.hasMoreElements()) {
        queue.dequeue();
      }
      if (children.hasMoreElements()) {
        queue.enqueue(children);
      }
      return node;
    }
Ejemplo n.º 3
0
    public TreeNode nextElement() {
      TreeNode retval;

      if (subtree.hasMoreElements()) {
        retval = subtree.nextElement();
      } else if (children.hasMoreElements()) {
        subtree = new PostorderEnumeration(children.nextElement());
        retval = subtree.nextElement();
      } else {
        retval = root;
        root = null;
      }

      return retval;
    }
Ejemplo n.º 4
0
  /** Returns the URLs contained within an RMI registry reference. */
  private static String[] getURLs(Reference ref) throws NamingException {

    int size = 0; // number of URLs
    String[] urls = new String[ref.size()];

    Enumeration<RefAddr> addrs = ref.getAll();
    while (addrs.hasMoreElements()) {
      RefAddr addr = addrs.nextElement();

      if ((addr instanceof StringRefAddr) && addr.getType().equals(ADDRESS_TYPE)) {

        urls[size++] = (String) addr.getContent();
      }
    }
    if (size == 0) {
      throw (new ConfigurationException("Reference contains no valid addresses"));
    }

    // Trim URL array down to size.
    if (size == ref.size()) {
      return urls;
    }
    String[] urls2 = new String[size];
    System.arraycopy(urls, 0, urls2, 0, size);
    return urls2;
  }
Ejemplo n.º 5
0
 public void run() {
   JavaClass clazz = snapshot.findClass(query);
   String instancesOf;
   if (newObjects) instancesOf = "New instances of ";
   else instancesOf = "Instances of ";
   if (includeSubclasses) {
     startHtml(instancesOf + query + " (including subclasses)");
   } else {
     startHtml(instancesOf + query);
   }
   if (clazz == null) {
     error("Class not found");
   } else {
     out.print("<strong>");
     printClass(clazz);
     out.print("</strong><br><br>");
     Enumeration objects = clazz.getInstances(includeSubclasses);
     long totalSize = 0;
     long instances = 0;
     while (objects.hasMoreElements()) {
       JavaHeapObject obj = (JavaHeapObject) objects.nextElement();
       if (newObjects && !obj.isNew()) continue;
       printThing(obj);
       out.println("<br>");
       totalSize += obj.getSize();
       instances++;
     }
     out.println(
         "<h2>Total of " + instances + " instances occupying " + totalSize + " bytes.</h2>");
   }
   endHtml();
 }
Ejemplo n.º 6
0
  //
  // This function is the recursive search of groups for this
  // implementation of the Group. The search proceeds building up
  // a vector of already seen groups. Only new groups are considered,
  // thereby avoiding loops.
  //
  boolean isMemberRecurse(Principal member, Vector<Group> alreadySeen) {
    Enumeration<? extends Principal> e = members();
    while (e.hasMoreElements()) {
      boolean mem = false;
      Principal p = (Principal) e.nextElement();

      // if the member is in this collection, return true
      if (p.equals(member)) {
        return true;
      } else if (p instanceof GroupImpl) {
        //
        // if not recurse if the group has not been checked already.
        // Can call method in this package only if the object is an
        // instance of this class. Otherwise call the method defined
        // in the interface. (This can lead to a loop if a mixture of
        // implementations form a loop, but we live with this improbable
        // case rather than clutter the interface by forcing the
        // implementation of this method.)
        //
        GroupImpl g = (GroupImpl) p;
        alreadySeen.addElement(this);
        if (!alreadySeen.contains(g)) mem = g.isMemberRecurse(member, alreadySeen);
      } else if (p instanceof Group) {
        Group g = (Group) p;
        if (!alreadySeen.contains(g)) mem = g.isMember(member);
      }

      if (mem) return mem;
    }
    return false;
  }
Ejemplo n.º 7
0
  /** Print the HTML tag. */
  public static void printTag(PrintStream out, Hashtable atts) {
    out.print("<applet");

    String v = (String) atts.get("codebase");
    if (v != null) {
      out.print(" codebase=\"" + v + "\"");
    }

    v = (String) atts.get("code");
    if (v == null) {
      v = "applet.class";
    }
    out.print(" code=\"" + v + "\"");
    v = (String) atts.get("width");
    if (v == null) {
      v = "150";
    }
    out.print(" width=" + v);

    v = (String) atts.get("height");
    if (v == null) {
      v = "100";
    }
    out.print(" height=" + v);

    v = (String) atts.get("name");
    if (v != null) {
      out.print(" name=\"" + v + "\"");
    }
    out.println(">");

    // A very slow sorting algorithm
    int len = atts.size();
    String params[] = new String[len];
    len = 0;
    for (Enumeration e = atts.keys(); e.hasMoreElements(); ) {
      String param = (String) e.nextElement();
      int i = 0;
      for (; i < len; i++) {
        if (params[i].compareTo(param) >= 0) {
          break;
        }
      }
      System.arraycopy(params, i, params, i + 1, len - i);
      params[i] = param;
      len++;
    }

    for (int i = 0; i < len; i++) {
      String param = params[i];
      if (systemParam.get(param) == null) {
        out.println("<param name=" + param + " value=\"" + atts.get(param) + "\">");
      }
    }
    out.println("</applet>");
  }
Ejemplo n.º 8
0
 /**
  * Delete all the generated source files made during the execution of this environment (those that
  * have been registered with the "addGeneratedFile" method).
  */
 public void deleteGeneratedFiles() {
   synchronized (generatedFiles) {
     Enumeration<File> enumeration = generatedFiles.elements();
     while (enumeration.hasMoreElements()) {
       File file = enumeration.nextElement();
       file.delete();
     }
     generatedFiles.removeAllElements();
   }
 }
Ejemplo n.º 9
0
  /**
   * Returns the depth of the tree rooted at this node -- the longest distance from this node to a
   * leaf. If this node has no children, returns 0. This operation is much more expensive than
   * <code>getLevel()</code> because it must effectively traverse the entire tree rooted at this
   * node.
   *
   * @see #getLevel
   * @return the depth of the tree whose root is this node
   */
  public int getDepth() {
    Object last = null;
    Enumeration enum_ = breadthFirstEnumeration();

    while (enum_.hasMoreElements()) {
      last = enum_.nextElement();
    }

    if (last == null) {
      throw new Error("nodes should be null");
    }

    return ((DefaultMutableTreeNode) last).getLevel() - getLevel();
  }
Ejemplo n.º 10
0
  /**
   * Processes a <CODE>get</CODE> operation. It will throw an exception for V1 requests or it will
   * set exceptions within the list for V2 requests.
   *
   * @param inRequest The SnmpMibRequest object holding the list of variable to be retrieved.
   * @exception SnmpStatusException An error occurred during the operation.
   */
  @Override
  public void get(SnmpMibRequest inRequest) throws SnmpStatusException {

    SNMP_ADAPTOR_LOGGER.logp(
        Level.FINEST, SnmpErrorHandlerAgent.class.getName(), "get", "Get in Exception");

    if (inRequest.getVersion() == SnmpDefinitions.snmpVersionOne)
      throw new SnmpStatusException(SnmpStatusException.noSuchName);

    Enumeration<SnmpVarBind> l = inRequest.getElements();
    while (l.hasMoreElements()) {
      SnmpVarBind varbind = l.nextElement();
      varbind.setNoSuchObject();
    }
  }
Ejemplo n.º 11
0
  /**
   * Processes a <CODE>getBulk</CODE> operation. It will throw an exception if the request is a V1
   * one or it will set exceptions within the list for V2 ones.
   *
   * @param inRequest The SnmpMibRequest object holding the list of variable to be retrieved.
   * @exception SnmpStatusException An error occurred during the operation.
   */
  @Override
  public void getBulk(SnmpMibRequest inRequest, int nonRepeat, int maxRepeat)
      throws SnmpStatusException {

    SNMP_ADAPTOR_LOGGER.logp(
        Level.FINEST, SnmpErrorHandlerAgent.class.getName(), "getBulk", "GetBulk in Exception");

    if (inRequest.getVersion() == SnmpDefinitions.snmpVersionOne)
      throw new SnmpStatusException(SnmpDefinitions.snmpRspGenErr, 0);

    Enumeration<SnmpVarBind> l = inRequest.getElements();
    while (l.hasMoreElements()) {
      SnmpVarBind varbind = l.nextElement();
      varbind.setEndOfMibView();
    }
  }
Ejemplo n.º 12
0
  /** Return an enumeration of all the accessible applets on this page. */
  public Enumeration getApplets() {
    AppletSecurity security = (AppletSecurity) System.getSecurityManager();
    Vector v = new Vector();
    SocketPermission panelSp = new SocketPermission(panel.getCodeBase().getHost(), "connect");

    for (Enumeration e = appletPanels.elements(); e.hasMoreElements(); ) {
      AppletPanel p = (AppletPanel) e.nextElement();
      if (p.getDocumentBase().equals(panel.getDocumentBase())) {

        SocketPermission sp = new SocketPermission(p.getCodeBase().getHost(), "connect");
        if (panelSp.implies(sp)) {
          v.addElement(p.applet);
        }
      }
    }
    return v.elements();
  }
Ejemplo n.º 13
0
  /**
   * Returns the total number of leaves that are descendants of this node. If this node is a leaf,
   * returns <code>1</code>. This method is O(n) where n is the number of descendants of this node.
   *
   * @see #isNodeAncestor
   * @return the number of leaves beneath this node
   */
  public int getLeafCount() {
    int count = 0;

    TreeNode node;
    Enumeration enum_ = breadthFirstEnumeration(); // order matters not

    while (enum_.hasMoreElements()) {
      node = (TreeNode) enum_.nextElement();
      if (node.isLeaf()) {
        count++;
      }
    }

    if (count < 1) {
      throw new Error("tree has zero leaves");
    }

    return count;
  }
Ejemplo n.º 14
0
  /** Get an applet by name. */
  public Applet getApplet(String name) {
    AppletSecurity security = (AppletSecurity) System.getSecurityManager();
    name = name.toLowerCase();
    SocketPermission panelSp = new SocketPermission(panel.getCodeBase().getHost(), "connect");
    for (Enumeration e = appletPanels.elements(); e.hasMoreElements(); ) {
      AppletPanel p = (AppletPanel) e.nextElement();
      String param = p.getParameter("name");
      if (param != null) {
        param = param.toLowerCase();
      }
      if (name.equals(param) && p.getDocumentBase().equals(panel.getDocumentBase())) {

        SocketPermission sp = new SocketPermission(p.getCodeBase().getHost(), "connect");

        if (panelSp.implies(sp)) {
          return p.applet;
        }
      }
    }
    return null;
  }