Examples of java.beans.BeanInfo

java.beans.BeanInfo
A bean implementor who wishes to provide explicit information about their bean may provide a BeanInfo class that implements this BeanInfo interface and provides explicit information about the methods, properties, events, etc, of their bean.
A bean implementor doesn't need to provide a complete set of explicit information. You can pick and choose which information you want to provide and the rest will be obtained by automatic analysis using low-level reflection of the bean classes' methods and applying standard design patterns.
You get the opportunity to provide lots and lots of different information as part of the various XyZDescriptor classes. But don't panic, you only really need to provide the minimal core information required by the various constructors.
See also the SimpleBeanInfo class which provides a convenient "noop" base class for BeanInfo classes, which you can override for those specific places where you want to return explicit info.
To learn about all the behaviour of a bean see the Introspector class.

                || !(object.get(2) instanceof Point)) {
            throw new IllegalArgumentException("bad drop object " + object);
        }


        Object bean = object.get(0);
        BeanInfo beanInfo = (BeanInfo) object.get(1);
        Point point = (Point) object.get(2);


        beanInfoMap.put(bean.getClass().getName(), beanInfo);


        prepareForAddition(bean, beanInfo, point);

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     * returns the image contained in the BeanInfo for the bean, or
     * the default BeanPanel image if no image is found in the
     * BeanInfo.
     */
    protected Image getDragImage(Object bean) {
        BeanInfo beanInfo = this.getBeanInfoForBean(bean.getClass().getName());


        if (beanInfo == null) {
            if (Debug.debugging("beanbox"))
                Debug.output("No beanInfo found for bean: " + bean);
            return BeanPanel.defaultBeanIcon.getImage();
        }


        Image img = beanInfo.getIcon(BeanInfo.ICON_COLOR_32x32);


        if (img == null) {
            if (Debug.debugging("beanbox"))
                Debug.output("No image found in beanInfo for bean: " + bean);
            return BeanPanel.defaultBeanIcon.getImage();

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    throws StoreException
  {
    ClassLoader cl = HTTPRepositoryMetaData.class.getClassLoader();
    Class<?>[] interfaces = new Class<?>[] { RepositoryMetaData.class };
    try {
      BeanInfo info = Introspector.getBeanInfo(RepositoryMetaData.class);
      PropertyDescriptor[] properties = info.getPropertyDescriptors();
      HTTPRepositoryMetaData h = new HTTPRepositoryMetaData(repository, model, properties);
      return (RepositoryMetaData)Proxy.newProxyInstance(cl, interfaces, h);
    }
    catch (IntrospectionException e) {
      throw new StoreException(e);

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         installFor(e.getClass());
   }


   public static void installFor(Class<? extends Enum> enumClass) {
     try {
       BeanInfo info = Introspector.getBeanInfo( enumClass );
       info.getBeanDescriptor().setValue( "persistenceDelegate", INSTANCE );
     } catch( IntrospectionException exception ) {
       throw new RuntimeException("Unable to persist enumerated type "+enumClass, exception);
     }
   }

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    return (JavaProperty[])result.toArray(new JavaProperty[0]);
  }
  
  public JavaProperty[] getProperties() throws Exception {
    List<JavaProperty> result = new ArrayList<JavaProperty>();
    BeanInfo beanInfo = Introspector.getBeanInfo(clazz);
    PropertyDescriptor[] pds = beanInfo.getPropertyDescriptors();
    for(PropertyDescriptor pd : pds) {
        if(!"class".equalsIgnoreCase(pd.getName())) {
            result.add(new JavaProperty(pd,this));
        }
    }

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    final Vector<Object> columnData = new Vector<Object>();
    if (_bean != null)
    {
      try
      {
        BeanInfo info = Introspector.getBeanInfo(_bean.getClass(), Introspector.USE_ALL_BEANINFO);
        processBeanInfo(info, columnData);
      }
      catch (Exception ex)
      {
        throw new BaseException(ex);

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      else
      {
        beanClass = Class.forName(beanClassName, true, _cl);
      }
      Object bean = beanClass.newInstance();
      BeanInfo info =
        Introspector.getBeanInfo(
          bean.getClass(),
          Introspector.USE_ALL_BEANINFO);
      PropertyDescriptor[] propDesc = info.getPropertyDescriptors();
      Map<String, PropertyDescriptor> props = 
                new HashMap<String, PropertyDescriptor>();
      for (int i = 0; i < propDesc.length; ++i)
      {
        props.put(propDesc[i].getName(), propDesc[i]);

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  private IXMLElement createElement(Object bean, String name)
    throws XMLException
  {
    IXMLElement elem = null;
    BeanInfo info = null;
    try
    {
      if (bean != null)
      {
        info = Introspector.getBeanInfo(bean.getClass(), Object.class);
      }
    }
    catch (IntrospectionException ex)
    {
      throw new XMLException(ex);
    }
    elem = new XMLElement(name != null ? name : XMLConstants.BEAN_ELEMENT_NAME);
    if (info != null)
    {
      if (bean instanceof IXMLAboutToBeWritten)
      {
        ((IXMLAboutToBeWritten) bean).aboutToBeWritten();
      }
      PropertyDescriptor[] propDesc = info.getPropertyDescriptors();
      elem = new XMLElement(name != null ? name : XMLConstants.BEAN_ELEMENT_NAME);
      elem.setAttribute(XMLConstants.CLASS_ATTRIBUTE_NAME,
                      bean.getClass().getName());
      for (int i = 0; i < propDesc.length; ++i)
      {

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    commonCtor();
    if (bean != null)
    {
      try
      {
        BeanInfo info = Introspector.getBeanInfo(bean.getClass(),
                        Introspector.USE_ALL_BEANINFO);
        processBeanInfo(bean, info);
      }
      catch (Exception ex)
      {

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      beans = new Object[0];
    }


    if (beans.length > 0)
    {
      BeanInfo info = null;
      try
      {
        info = Introspector.getBeanInfo(beans[0].getClass(), Introspector.USE_ALL_BEANINFO);
        validateBeans(beans);
        initialize(info);

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