knowledgeflowapp.java

代码是一个分类器的实现,其中使用了部分weka的源代码。可以将项目导入eclipse运行

	if (disabled) {
	  custItem.setEnabled(false);
	}
	beanContextMenu.add(custItem);
	menuItemCount++;
      }
    }
    //    System.err.println("Just before showing menu");
    // popup the menu
    if (menuItemCount > 0) {
      beanContextMenu.show(m_beanLayout, x, y);
    }
  }

  /**
   * Popup the customizer for this bean
   *
   * @param custClass the class of the customizer
   * @param bc the bean to be customized
   */
  private void popupCustomizer(Class custClass, JComponent bc) {
    try {
      // instantiate
      final Object customizer = custClass.newInstance();
      ((Customizer)customizer).setObject(bc);
      final javax.swing.JFrame jf = new javax.swing.JFrame();
      jf.getContentPane().setLayout(new BorderLayout());
      jf.getContentPane().add((JComponent)customizer, BorderLayout.CENTER);
      if (customizer instanceof CustomizerCloseRequester) {
	((CustomizerCloseRequester)customizer).setParentFrame(jf);
      }
      jf.addWindowListener(new java.awt.event.WindowAdapter() {
	  public void windowClosing(java.awt.event.WindowEvent e) {
	    if (customizer instanceof CustomizerClosingListener) {
	      ((CustomizerClosingListener)customizer).customizerClosing();
	    }
	    jf.dispose();
	  }
	});
      jf.pack();
      jf.setVisible(true);
    } catch (Exception ex) {
      ex.printStackTrace();
    }
  }

                                
  /**
   * Handles adding a custom MetaBean to the user toolbar
   *
   * @param bean the MetaBean
   * @param installListener install a listener for window close
   * events so as to save the user components
   */
  private void addToUserToolBar(MetaBean bean, 
                                boolean installListener) {

    if (m_userToolBar == null) {
      // need to create the user tab and toolbar
      setUpUserToolBar();
    }

    // Disconnect any beans connected to the inputs or outputs
    // of this MetaBean (prevents serialization of the entire
    // KnowledgeFlow!!)
    Vector tempRemovedConnections = new Vector();
    Vector allConnections = BeanConnection.getConnections();
    Vector inputs = bean.getInputs();
    Vector outputs = bean.getOutputs();
    for (int i = 0; i < inputs.size(); i++) {
      BeanInstance temp = (BeanInstance)inputs.elementAt(i);
      // is this input a target for some event?
      for (int j = 0; j < allConnections.size(); j++) {
        BeanConnection tempC = (BeanConnection)allConnections.elementAt(j);
        if (tempC.getTarget() == temp) {
          tempRemovedConnections.add(tempC);
        }
      }
    }
    for (int i = 0; i < outputs.size(); i++) {
      BeanInstance temp = (BeanInstance)outputs.elementAt(i);
      // is this output a source for some target?
      for (int j = 0; j < allConnections.size(); j++) {
        BeanConnection tempC = (BeanConnection)allConnections.elementAt(j);
        if (tempC.getSource() == temp) {
          tempRemovedConnections.add(tempC);
        }
      }
    }
    
    
    for (int i = 0; i < tempRemovedConnections.size(); i++) {
      BeanConnection temp = 
        (BeanConnection)tempRemovedConnections.elementAt(i);
      temp.remove();
    }
    
    // now add to user tool bar
    JPanel tempUser = instantiateToolBarMetaBean(bean);
    m_userBoxPanel.add(tempUser);
    if (installListener && m_firstUserComponentOpp) {
      try {
        installWindowListenerForSavingUserBeans();
        m_firstUserComponentOpp = false;
      } catch (Exception ex) {
        ex.printStackTrace();
      }
    }

    // Now reinstate any deleted connections to the original MetaBean
    for (int i = 0; i < tempRemovedConnections.size(); i++) {
      BeanConnection temp = 
        (BeanConnection)tempRemovedConnections.elementAt(i);
      BeanConnection newC = 
        new BeanConnection(temp.getSource(), temp.getTarget(),
                           temp.getSourceEventSetDescriptor());
    }    
  }

  /**
   * Popup a menu giving choices for connections to delete (if any)
   *
   * @param closestConnections a vector containing 0 or more BeanConnections
   * @param x the x coordinate at which to popup the menu
   * @param y the y coordinate at which to popup the menu
   */
  private void deleteConnectionPopup(Vector closestConnections,
				     int x, int y) {
    if (closestConnections.size() > 0) {
      int menuItemCount = 0;
      JPopupMenu deleteConnectionMenu = new JPopupMenu();

      deleteConnectionMenu.insert(new JLabel("Delete Connection", 
					     SwingConstants.CENTER), 
				  menuItemCount);
      menuItemCount++;
      for (int i = 0; i < closestConnections.size(); i++) {
	final BeanConnection bc = 
	  (BeanConnection)closestConnections.elementAt(i);
	String connName = bc.getSourceEventSetDescriptor().getName();
	JMenuItem deleteItem = new JMenuItem(connName);
	deleteItem.addActionListener(new ActionListener() {
	    public void actionPerformed(ActionEvent e) {
	      bc.remove();
	      m_beanLayout.revalidate();
	      m_beanLayout.repaint();
	    }
	  });
	deleteConnectionMenu.add(deleteItem);
	menuItemCount++;
      }
      deleteConnectionMenu.show(m_beanLayout, x, y);
    }
  }

  /**
   * Initiates the connection process for two beans
   *
   * @param esd the EventSetDescriptor for the source bean
   * @param bi the source bean
   * @param x the x coordinate to start connecting from
   * @param y the y coordinate to start connecting from
   */
  private void connectComponents(EventSetDescriptor esd, 
				 BeanInstance bi,
				 int x,
				 int y) {
    // record the event set descriptior for this event
    m_sourceEventSetDescriptor = esd;

    Class listenerClass = esd.getListenerType(); // class of the listener
    JComponent source = (JComponent)bi.getBean();
    // now determine which (if any) of the other beans implement this
    // listener
    int targetCount = 0;
    Vector beanInstances = BeanInstance.getBeanInstances();
    for (int i = 0; i < beanInstances.size(); i++) {
      JComponent bean = 
	(JComponent)((BeanInstance)beanInstances.elementAt(i)).getBean();
      boolean connectable = false;
      boolean canContinue = false;
      if (bean != source) {
        if (bean instanceof MetaBean) {
          if (((MetaBean)bean).canAcceptConnection(listenerClass)) {
            canContinue = true;
          }
        } else if (listenerClass.isInstance(bean) && bean != source) {
          canContinue = true;
        }
      }
      if (canContinue) {
	if (!(bean instanceof BeanCommon)) {
	  connectable = true; // assume this bean is happy to receive a connection
	} else {
	  // give this bean a chance to veto any proposed connection via
	  // the listener interface
	  if (((BeanCommon)bean).
	      connectionAllowed(esd)) {
	    connectable = true;
	  }
	}
	if (connectable) {
	  if (bean instanceof Visible) {
	    targetCount++;
	    ((Visible)bean).getVisual().setDisplayConnectors(true);
	  }
	}
      }
    }
    
    // have some possible beans to connect to?
    if (targetCount > 0) {
      //      System.err.println("target count "+targetCount);
      if (source instanceof Visible) {
	((Visible)source).getVisual().setDisplayConnectors(true);
      }

      m_editElement = bi;
      Point closest = ((Visible)source).getVisual().
	getClosestConnectorPoint(new Point(x, y));

      m_startX = (int)closest.getX();
      m_startY = (int)closest.getY();
      m_oldX = m_startX;
      m_oldY = m_startY;

      Graphics2D gx = (Graphics2D)m_beanLayout.getGraphics();
      gx.setXORMode(java.awt.Color.white);
      gx.drawLine(m_startX, m_startY, m_startX, m_startY);
      gx.dispose();
      m_mode = CONNECTING;
    }
  }

  private void addComponent(BeanInstance comp, boolean repaint) {
    if (comp.getBean() instanceof Visible) {
      ((Visible)comp.getBean()).getVisual().addPropertyChangeListener(this);
    }
    if (comp.getBean() instanceof BeanCommon) {
      ((BeanCommon)comp.getBean()).setLog(m_logPanel);
    }
    if (comp.getBean() instanceof MetaBean) {
      // re-align sub-beans
      Vector list;
      
      list = ((MetaBean) comp.getBean()).getInputs();
      for (int i = 0; i < list.size(); i++) {
        ((BeanInstance) list.get(i)).setX(comp.getX());
        ((BeanInstance) list.get(i)).setY(comp.getY());
      }

      list = ((MetaBean) comp.getBean()).getOutputs();
      for (int i = 0; i < list.size(); i++) {
        ((BeanInstance) list.get(i)).setX(comp.getX());
        ((BeanInstance) list.get(i)).setY(comp.getY());
      }
    }
    setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
    if (repaint) {
      m_beanLayout.repaint();
    }
    m_pointerB.setSelected(true);
    m_mode = NONE;
  }

  private void addComponent(int x, int y) {
    if (m_toolBarBean instanceof MetaBean) {
      // need to add the MetaBean's internal connections
      // to BeanConnection's vector
      Vector associatedConnections = 
        ((MetaBean)m_toolBarBean).getAssociatedConnections();
      BeanConnection.getConnections().addAll(associatedConnections);
    }

    if (m_toolBarBean instanceof BeanContextChild) {
      m_bcSupport.add(m_toolBarBean);
    }
    BeanInstance bi = new BeanInstance(m_beanLayout, m_toolBarBean, x, y);
    //    addBean((JComponent)bi.getBean());
    m_toolBarBean = null;
    addComponent(bi, true);
  }

  /**
   * Handles the checking of a selected set of components
   * for suitability for grouping. If suitable the user
   * is prompted for a name and then a MetaBean is used
   * group the components.
   */
  private void checkSubFlow(int startX, int startY,
                            int endX, int endY) {

    java.awt.Rectangle r = 
      new java.awt.Rectangle((startX < endX) ? startX : endX,
                             (startY < endY) ? startY: endY,
                             Math.abs(startX - endX),
                             Math.abs(startY - endY));
    Vector selected = BeanInstance.findInstances(r);

    // check if sub flow is valid
    Vector inputs = BeanConnection.inputs(selected);
    Vector outputs = BeanConnection.outputs(selected);
    
    // screen the inputs and outputs
    if (inputs.size() == 0 || outputs.size() == 0) {
      return;
    }

    // dissallow MetaBeans in the selected set (for the
    // time being).
    for (int i = 0; i < selected.size(); i++) {
      BeanInstance temp = (BeanInstance)selected.elementAt(i);
      if (temp.getBean() instanceof MetaBean) {
        return;
      }
    }

    // show connector dots for selected beans
    for (int i = 0; i < selected.size(); i++) {
      BeanInstance temp = (BeanInstance)selected.elementAt(i);
      if (temp.getBean() instanceof Visible) {
        ((Visible)temp.getBean()).getVisual().setDisplayConnectors(true);
      }
    }

    // show connector dots for input beans
    for (int i = 0; i < inputs.size(); i++) {
      BeanInstance temp = (BeanInstance)inputs.elementAt(i);
      if (temp.getBean() instanceof Visible) {
        ((Visible)temp.getBean()).getVisual().
          setDisplayConnectors(true, java.awt.Color.red);
      }
    }

    // show connector dots for output beans
    for (int i = 0; i < outputs.size(); i++) {
      BeanInstance temp = (BeanInstance)outputs.elementAt(i);
      if (temp.getBean() instanceof Visible) {
        ((Visible)temp.getBean()).getVisual().
          setDisplayConnectors(true, java.awt.Color.green);
      }
    }

    // Confirmation pop-up
    int result = JOptionPane.showConfirmDialog(KnowledgeFlowApp.this,
                                               "Group this sub-flow?",
                                               "Group Components",
                                               JOptionPane.YES_NO_OPTION);
    if (result == JOptionPane.YES_OPTION) {
      Vector associatedConnections = 
        BeanConnection.associatedConnections(selected);

      String name = JOptionPane.showInputDialog(KnowledgeFlowApp.this,
                                                "Enter a name for this group",
                                                "MyGroup");
      if (name != null) {       
        MetaBean group = new MetaBean();
        group.setSubFlow(selected);
        group.setAssociatedConnections(associatedConnections);
        group.setInputs(inputs);
        group.setOutputs(outputs);
        if (name.length() > 0) {
          group.getVisual().setText(name);
        }
        
        if (group instanceof BeanContextChild) {
          m_bcSupport.add(group);
        }
        BeanInstance bi = new BeanInstance(m_beanLayout, group, 
                                           (int)r.getX()+(int)(r.getWidth()/2),
                                           (int)r.getY()+(int)(r.getHeight()/2));
        for (int i = 0; i < selected.size(); i++) {
          BeanInstance temp = (BeanInstance)selected.elementAt(i);
          temp.removeBean(m_beanLayout);
          if (temp.getBean() instanceof Visible) {