xmlbeans.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

      throws Exception {
    
    Element                 node;
    weka.gui.beans.Loader   loader;

    // for debugging only
    if (DEBUG)
       trace(new Throwable(), name);
    
    m_CurrentNode = parent;
    
    loader = (weka.gui.beans.Loader) o;
    node   = addElement(parent, name, loader.getClass().getName(), false);

    invokeWriteToXML(node, loader.getLoader(), VAL_LOADER);
    invokeWriteToXML(node, loader.getBeanContext(), VAL_BEANCONTEXT);
    
    return node;
  }

  /**
   * adds the given Saver (a bean) to a DOM structure.
   * 
   * @param parent the parent of this object, e.g. the class this object is a member of
   * @param o the Object to describe in XML
   * @param name the name of the object
   * @return the node that was created
   * @throws Exception if the DOM creation fails
   */
  public Element writeBeanSaver(Element parent, Object o, String name)
      throws Exception {
    
    Element                 node;
    weka.gui.beans.Saver    saver;

    // for debugging only
    if (DEBUG)
       trace(new Throwable(), name);
    
    m_CurrentNode = parent;
    
    saver = (weka.gui.beans.Saver) o;
    node   = addElement(parent, name, saver.getClass().getName(), false);

    invokeWriteToXML(node, saver.getSaver(), VAL_SAVER);
    
    return node;
  }
  
  /**
   * adds the given Loader to a DOM structure.
   * 
   * @param parent the parent of this object, e.g. the class this object is a member of
   * @param o the Object to describe in XML
   * @param name the name of the object
   * @return the node that was created
   * @throws Exception if the DOM creation fails
   */
  public Element writeLoader(Element parent, Object o, String name)
      throws Exception {
    
    Element                       node;
    weka.core.converters.Loader   loader;
    File                          file;
    boolean                       known;

    // for debugging only
    if (DEBUG)
       trace(new Throwable(), name);
    
    m_CurrentNode = parent;
    
    loader = (weka.core.converters.Loader) o;
    node   = addElement(parent, name, loader.getClass().getName(), false);
    known  = true;
    file   = null;

    // file
    if (loader instanceof weka.core.converters.AbstractFileLoader)
      file = ((weka.core.converters.AbstractFileLoader) loader).retrieveFile();
    else
      known = false;

    if (!known)
      System.out.println("WARNING: unknown loader class '" + loader.getClass().getName() + "' - cannot retrieve file!");
    
    // only save it, if it's a real file!
    if ( (file == null) || (file.isDirectory()) )
      invokeWriteToXML(node, "", VAL_FILE);
    else
      invokeWriteToXML(node, file.getAbsolutePath(), VAL_FILE);
    
    return node;
  }

  /**
   * builds the Loader from the given DOM node.
   * 
   * @param node the associated XML node
   * @return the instance created from the XML description
   * @throws Exception if instantiation fails
   */
  public Object readLoader(Element node) throws Exception {
    Object      result;
    Vector      children;
    Element     child;
    int         i;
    String      name;
    String      file;
    File        fl;

    // for debugging only
    if (DEBUG)
       trace(new Throwable(), node.getAttribute(ATT_NAME));

    m_CurrentNode = node;
    
    result   = Class.forName(node.getAttribute(ATT_CLASS)).newInstance();
    children = XMLDocument.getChildTags(node);
    file     = "";

    for (i = 0; i < children.size(); i++) {
      child = (Element) children.get(i);
      name  = child.getAttribute(ATT_NAME);

      if (name.equals(VAL_FILE))
        file = (String) invokeReadFromXML(child);
      else
        readFromXML(result, name, child);
    }

    if (file.equals(""))
      file = null;

    // set file only, if it exists
    if (file != null) {
      fl = new File(file);
      if (fl.exists())
        ((weka.core.converters.AbstractFileLoader) result).setSource(fl);
      else
        System.out.println("WARNING: The file '" + file + "' does not exist!");
    }
    
    return result;
  }

  /**
   * adds the given Saver to a DOM structure.
   * 
   * @param parent the parent of this object, e.g. the class this object is a member of
   * @param o the Object to describe in XML
   * @param name the name of the object
   * @return the node that was created
   * @throws Exception if the DOM creation fails
   */
  public Element writeSaver(Element parent, Object o, String name)
      throws Exception {
    
    Element                     node;
    weka.core.converters.Saver  saver;
    File                        file;
    String			prefix;
    String			dir;
    boolean                     known;

    // for debugging only
    if (DEBUG)
       trace(new Throwable(), name);
    
    m_CurrentNode = parent;
    
    saver  = (weka.core.converters.Saver) o;
    node   = addElement(parent, name, saver.getClass().getName(), false);
    known  = true;
    file   = null;
    prefix = "";
    dir    = "";

    // file
    if (saver instanceof weka.core.converters.AbstractFileSaver) {
      file   = ((weka.core.converters.AbstractFileSaver) saver).retrieveFile();
      prefix = ((weka.core.converters.AbstractFileSaver) saver).filePrefix();
      dir    = ((weka.core.converters.AbstractFileSaver) saver).retrieveDir();
    }
    else {
      known = false;
    }
    
    if (!known)
      System.out.println("WARNING: unknown saver class '" + saver.getClass().getName() + "' - cannot retrieve file!");
    
    // only save it, if it's a real file!
    if ( (file == null) || (file.isDirectory()) ) {
      invokeWriteToXML(node, "",     VAL_FILE);
      invokeWriteToXML(node, dir,    VAL_DIR);
      invokeWriteToXML(node, prefix, VAL_PREFIX);
    }
    else {
      invokeWriteToXML(node, file.getAbsolutePath(), VAL_FILE);
      invokeWriteToXML(node, "", VAL_DIR);
      invokeWriteToXML(node, "", VAL_PREFIX);
    }
    
    return node;
  }

  /**
   * builds the Saver from the given DOM node.
   * 
   * @param node the associated XML node
   * @return the instance created from the XML description
   * @throws Exception if instantiation fails
   */
  public Object readSaver(Element node) throws Exception {
    Object      result;
    Vector      children;
    Element     child;
    int         i;
    String      name;
    String      file;
    String	dir;
    String	prefix;

    // for debugging only
    if (DEBUG)
       trace(new Throwable(), node.getAttribute(ATT_NAME));

    m_CurrentNode = node;
    
    result   = Class.forName(node.getAttribute(ATT_CLASS)).newInstance();
    children = XMLDocument.getChildTags(node);
    file     = null;
    dir      = null;
    prefix   = null;

    for (i = 0; i < children.size(); i++) {
      child = (Element) children.get(i);
      name  = child.getAttribute(ATT_NAME);

      if (name.equals(VAL_FILE))
        file = (String) invokeReadFromXML(child);
      else if (name.equals(VAL_DIR))
        dir = (String) invokeReadFromXML(child);
      else if (name.equals(VAL_PREFIX))
        prefix = (String) invokeReadFromXML(child);
      else
        readFromXML(result, name, child);
    }

    if ( (file != null) && (file.length() == 0) )
      file = null;
    
    if (file != null) {
      ((weka.core.converters.AbstractFileSaver) result).setFile(new File(file));
    }
    else if ( (dir != null) && (prefix != null) ) {
      ((weka.core.converters.AbstractFileSaver) result).setDir(dir);
      ((weka.core.converters.AbstractFileSaver) result).setFilePrefix(prefix);
    }
    
    return result;
  }

  /**
   * adds the given BeanVisual to a DOM structure.
   * 
   * @param parent the parent of this object, e.g. the class this object is a member of
   * @param o the Object to describe in XML
   * @param name the name of the object
   * @return the node that was created
   * @throws Exception if the DOM creation fails
   */
  public Element writeBeanVisual(Element parent, Object o, String name)
      throws Exception {
    
    Element         node;
    BeanVisual      visual;

    // for debugging only
    if (DEBUG)
       trace(new Throwable(), name);
    
    m_CurrentNode = parent;
    
    visual = (BeanVisual) o;
    node   = writeToXML(parent, o, name);

    // add icon paths
    invokeWriteToXML(node, visual.getIconPath(),         VAL_ICONPATH);
    invokeWriteToXML(node, visual.getAnimatedIconPath(), VAL_ANIMATEDICONPATH);
    
    return node;
  }

  /**
   * builds the BeanVisual from the given DOM node.
   * 
   * @param node the associated XML node
   * @return the instance created from the XML description
   * @throws Exception if instantiation fails
   */
  public Object readBeanVisual(Element node) throws Exception {
    Object      result;
    Vector      children;
    Element     child;
    int         i;
    String      name;
    String      text;
    String      iconPath;
    String      animIconPath;

    // for debugging only
    if (DEBUG)
       trace(new Throwable(), node.getAttribute(ATT_NAME));

    m_CurrentNode = node;
    
    result       = null;
    children     = XMLDocument.getChildTags(node);
    text         = "";
    iconPath     = "";
    animIconPath = "";

    // find text
    for (i = 0; i < children.size(); i++) {
      child = (Element) children.get(i);
      name  = child.getAttribute(ATT_NAME);

      if (name.equals(VAL_TEXT))
        text = (String) invokeReadFromXML(child);
      else if (name.equals(VAL_ICONPATH))
        iconPath = (String) invokeReadFromXML(child);
      else if (name.equals(VAL_ANIMATEDICONPATH))
        animIconPath = (String) invokeReadFromXML(child);
    }

    result = new BeanVisual(text, iconPath, animIconPath);
    
    // set rest of properties
    for (i = 0; i < children.size(); i++)
      readFromXML(result, node.getAttribute(ATT_NAME), (Element) children.get(i));
    
    return result;
  }
  
  /**
   * returns the IDs for the given BeanInstances, i.e., the stored IDs
   * in m_BeanInstancesID, based on m_BeanInstances
   * 
   * @param beans       the beans to retrieve the IDs for
   * @return            the IDs for the given BeanInstances
   * @see #m_BeanInstances
   * @see #m_BeanInstancesID
   */
  protected Vector getIDsForBeanInstances(Vector beans) {
    Vector        result;
    int           i;
    int           pos;
    
    result = new Vector();

    for (i = 0; i < beans.size(); i++) {
      pos = m_BeanInstances.indexOf(beans.get(i));
      result.add(m_BeanInstancesID.get(pos));
    }
    
    return result;
  }
  
  /**
   * adds the given MetaBean to a DOM structure.
   * 
   * @param parent the parent of this object, e.g. the class this object is a member of
   * @param o the Object to describe in XML
   * @param name the name of the object
   * @return the node that was created
   * @throws Exception if the DOM creation fails
   */
  public Element writeMetaBean(Element parent, Object o, String name)
      throws Exception {
    
    Element         node;
    MetaBean        meta;

    // for debugging only
    if (DEBUG)
       trace(new Throwable(), name);
    
    m_CurrentNode = parent;
    
    meta = (MetaBean) o;
    node = writeToXML(parent, o, name);

    invokeWriteToXML(node, getIDsForBeanInstances(meta.getBeansInInputs()), VAL_INPUTSID);
    invokeWriteToXML(node, getIDsForBeanInstances(meta.getBeansInOutputs()), VAL_OUTPUTSID);
    
    return node;
  }
  
  /**
   * returns a vector with references to BeanInstances according to the IDs
   * in the given Vector.
   * @param ids       contains the IDs of the BeanInstances
   * @return          the corresponding BeanInstances
   * @see #m_BeanInstances
   * @see #m_BeanInstancesID
   */
  protected Vector getBeanInstancesForIDs(Vector ids) {
    Vector        result;
    int           i;
    int           pos;
    
    result = new Vector();
    
    for (i = 0; i < ids.size(); i++) {
      pos = m_BeanInstancesID.indexOf(ids.get(i));
      result.add(m_BeanInstances.get(pos));
    }
    
    return result;
  }

  /**
   * builds the MetaBean from the given DOM node.
   * 
   * @param node the associated XML node
   * @return the instance created from the XML description
   * @throws Exception if instantiation fails
   */
  public Object readMetaBean(Element node) throws Exception {
    Object          result;
    Vector          children;
    Element         child;
    int             i;
    String          name;
    Vector          inputs;
    Vector          outputs;
    Vector          coords;
    MetaBean        bean;

    // for debugging only
    if (DEBUG)
       trace(new Throwable(), node.getAttribute(ATT_NAME));

    m_CurrentNode = node;
    
    result   = new MetaBean();
    children = XMLDocument.getChildTags(node);
    inputs   = new Vector();
    outputs  = new Vector();
    coords   = new Vector();
    
    // the current MetaBean
    m_CurrentMetaBean = (MetaBean) result;

    for (i = 0; i < children.size(); i++) {
      child = (Element) children.get(i);
      name  = child.getAttribute(ATT_NAME);

      if (name.equals(VAL_ASSOCIATEDCONNECTIONS))
        ((MetaBean) result).setAssociatedConnections((Vector) invokeReadFromXML(child));
      else if (name.equals(VAL_INPUTSID))
        inputs = (Vector) invokeReadFromXML(child);
      else if (name.equals(VAL_OUTPUTSID))
        outputs = (Vector) invokeReadFromXML(child);
      else if (name.equals(VAL_SUBFLOW))
        ((MetaBean) result).setSubFlow((Vector) invokeReadFromXML(child));
      else if (name.equals(VAL_ORIGINALCOORDS))
        coords = (Vector) invokeReadFromXML(child);
      else if (name.equals(VAL_INPUTS))
        System.out.println("INFO: '" + name + "' will be restored later.");
      else if (name.equals(VAL_OUTPUTS))
        System.out.println("INFO: '" + name + "' will be restored later.");
      else
        readFromXML(result, name, child);
    }

    bean = (MetaBean) result;
    
    // set inputs and outputs, after the beans have been instantiated
    bean.setInputs(getBeanInstancesForIDs(inputs));
    bean.setOutputs(getBeanInstancesForIDs(outputs));
    bean.setOriginalCoords(coords);
    
    return result;
  }
}