Examples of weka.core.Capabilities

weka.core.Capabilities
the classifier handle the data? getCapabilities().testWithFail(instances); ... // possible deletion of instances with missing class labels, etc. For only testing a single attribute, use this:
```
 ... Attribute att = instances.attribute(0); getCapabilities().testWithFail(att); ... 
```
Or for testing the class attribute (uses the capabilities that are especially for the class):
```
 ... Attribute att = instances.classAttribute(); getCapabilities().testWithFail(att, true); ... 
```
@author FracPete (fracpete at waikato dot ac dot nz) @version $Revision: 7082 $

   * Returns default capabilities of the base classifier.
   *
   * @return      the capabilities of the base classifier
   */
  public Capabilities getCapabilities() {
    Capabilities        result;


    // init model if necessary
    try {
      initModel();
    }
    catch (Exception e) {
      System.err.println(e);
    }


    if (m_Model != null) {
      result = m_Model.getCapabilities();
    } else {
      result = new Capabilities(this);
      result.disableAll();
    }
    
    // set dependencies
    for (Capability cap: Capability.values())
      result.enableDependency(cap);
    
    result.setOwner(this);
    
    return result;
  }

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      m_FilterEditor.setValue(ExplorerDefaults.getFilter());
    
    m_FilterEditor.addPropertyChangeListener(new PropertyChangeListener() {
      public void propertyChange(PropertyChangeEvent e) {
        m_ApplyFilterBut.setEnabled(getInstances() != null);
        Capabilities currentCapabilitiesFilter = m_FilterEditor.getCapabilitiesFilter();
        Filter filter = (Filter) m_FilterEditor.getValue();
        Capabilities currentFilterCapabilities = null;
        if (filter != null && currentCapabilitiesFilter != null &&
            (filter instanceof CapabilitiesHandler)) {
          currentFilterCapabilities = ((CapabilitiesHandler)filter).getCapabilities();
          
          if (!currentFilterCapabilities.supportsMaybe(currentCapabilitiesFilter) &&
              !currentFilterCapabilities.supports(currentCapabilitiesFilter)) {
            m_ApplyFilterBut.setEnabled(false);
          }
        }
      }
    });

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   * 
   * @param filter  the new filter to use
   */
  protected void updateCapabilitiesFilter(Capabilities filter) {
    Instances     tempInst;
    Capabilities   filterClass;


    if (filter == null) {
      m_FilterEditor.setCapabilitiesFilter(new Capabilities(null));
      return;
    }
    
    if (!ExplorerDefaults.getInitGenericObjectEditorFilter())
      tempInst = new Instances(m_Instances, 0);
    else
      tempInst = new Instances(m_Instances);
    tempInst.setClassIndex(m_AttVisualizePanel.getColorBox().getSelectedIndex() - 1);


    try {
      filterClass = Capabilities.forInstances(tempInst);
    }
    catch (Exception e) {
      filterClass = new Capabilities(null);
    }
    
    // set new filter
    m_FilterEditor.setCapabilitiesFilter(filterClass);
    
    // check capabilities
    m_ApplyFilterBut.setEnabled(true);
    Capabilities currentCapabilitiesFilter = m_FilterEditor.getCapabilitiesFilter();
    Filter currentFilter = (Filter) m_FilterEditor.getValue();
    Capabilities currentFilterCapabilities = null;
    if (currentFilter != null && currentCapabilitiesFilter != null &&
        (currentFilter instanceof CapabilitiesHandler)) {
      currentFilterCapabilities = ((CapabilitiesHandler)currentFilter).getCapabilities();
      
      if (!currentFilterCapabilities.supportsMaybe(currentCapabilitiesFilter) &&
          !currentFilterCapabilities.supports(currentCapabilitiesFilter)) {
        m_ApplyFilterBut.setEnabled(false);
      }
    }
  }

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   * Returns default capabilities of the classifier.
   *
   * @return      the capabilities of this classifier
   */
  public Capabilities getCapabilities() {
    Capabilities result = super.getCapabilities();


    // class
    result.disableAllClasses();
    result.disableAllClassDependencies();
    result.enable(Capability.NOMINAL_CLASS);
    
    return result;
  }

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   *
   * @return            the capabilities of this object
   * @see               Capabilities
   */
  public Capabilities getCapabilities() {
    Capabilities result = super.getCapabilities();
    
    // attributes
    result.enableAllAttributes();
    result.enable(Capability.MISSING_VALUES);
    
    // class
    result.enableAllClasses();
    result.enable(Capability.MISSING_CLASS_VALUES);
    result.enable(Capability.NO_CLASS);
    
    return result;
  }

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   * Returns default capabilities of the classifier.
   *
   * @return      the capabilities of this classifier
   */
  public Capabilities getCapabilities() {
    Capabilities result = super.getCapabilities();
    result.disableAll();


    // enable what we can handle
    
    // attributes
    result.enable(Capability.NOMINAL_ATTRIBUTES);
    result.enable(Capability.MISSING_VALUES);


    // class (can handle a nominal class if CAR rules are selected). This
    result.enable(Capability.NO_CLASS);
    result.enable(Capability.NOMINAL_CLASS);
    result.enable(Capability.MISSING_CLASS_VALUES);
    
    return result;
  }

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    m_ClustererEditor.setClassType(Clusterer.class);
    m_ClustererEditor.setValue(ExplorerDefaults.getClusterer());
    m_ClustererEditor.addPropertyChangeListener(new PropertyChangeListener() {
      public void propertyChange(PropertyChangeEvent e) {
        m_StartBut.setEnabled(true);
        Capabilities currentFilter = m_ClustererEditor.getCapabilitiesFilter();
        Clusterer clusterer = (Clusterer) m_ClustererEditor.getValue();
        Capabilities currentSchemeCapabilities =  null;
        if (clusterer != null && currentFilter != null && 
            (clusterer instanceof CapabilitiesHandler)) {
          currentSchemeCapabilities = ((CapabilitiesHandler)clusterer).getCapabilities();
          
          if (!currentSchemeCapabilities.supportsMaybe(currentFilter) &&
              !currentSchemeCapabilities.supports(currentFilter)) {
            m_StartBut.setEnabled(false);
          }
        }
  repaint();
      }

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   * 
   * @param filter  the new filter to use
   */
  protected void updateCapabilitiesFilter(Capabilities filter) {
    Instances     tempInst;
    Capabilities   filterClass;


    if (filter == null) {
      m_ClustererEditor.setCapabilitiesFilter(new Capabilities(null));
      return;
    }
    
    if (!ExplorerDefaults.getInitGenericObjectEditorFilter())
      tempInst = new Instances(m_Instances, 0);
    else
      tempInst = new Instances(m_Instances);
    tempInst.setClassIndex(-1);
    
    if (!m_ignoreKeyList.isSelectionEmpty()) {
      tempInst = removeIgnoreCols(tempInst);
    }


    try {
      filterClass = Capabilities.forInstances(tempInst);
    }
    catch (Exception e) {
      filterClass = new Capabilities(null);
    }
    
    m_ClustererEditor.setCapabilitiesFilter(filterClass);
    
    // check capabilities
    m_StartBut.setEnabled(true);
    Capabilities currentFilter = m_ClustererEditor.getCapabilitiesFilter();
    Clusterer clusterer = (Clusterer) m_ClustererEditor.getValue();
    Capabilities currentSchemeCapabilities =  null;
    if (clusterer != null && currentFilter != null && 
        (clusterer instanceof CapabilitiesHandler)) {
      currentSchemeCapabilities = ((CapabilitiesHandler)clusterer).getCapabilities();
      
      if (!currentSchemeCapabilities.supportsMaybe(currentFilter) &&
          !currentSchemeCapabilities.supports(currentFilter)) {
        m_StartBut.setEnabled(false);
      }
    }
  }

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   *
   * @return            the capabilities of this object
   * @see               Capabilities
   */
  public Capabilities getCapabilities() {
    Capabilities result = super.getCapabilities();
    result.disableAll();


    // attributes
    result.enableAllAttributes();
    result.enable(Capability.MISSING_VALUES);
    
    // class
    result.enableAllClasses();
    result.enable(Capability.MISSING_CLASS_VALUES);
    result.enable(Capability.NO_CLASS);
    
    return result;
  }

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   *
   * @return            the capabilities of this object
   * @see               Capabilities
   */
  public Capabilities getCapabilities() {
    Capabilities result = super.getCapabilities();
    result.disableAll();


    // attributes
    result.enable(Capability.NOMINAL_ATTRIBUTES);
    result.enable(Capability.NUMERIC_ATTRIBUTES);
    result.enable(Capability.DATE_ATTRIBUTES);
    result.enable(Capability.MISSING_VALUES);
    
    // class
    result.enable(Capability.NOMINAL_CLASS);
    result.enable(Capability.NUMERIC_CLASS);
    result.enable(Capability.DATE_CLASS);
    result.enable(Capability.MISSING_CLASS_VALUES);
    result.enable(Capability.NO_CLASS);
    
    return result;
  }

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