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BeanInfo get info from Bean

Posted on 2007-11-15
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Last Modified: 2012-06-27
Hi.
I'm working on a java bean with a beanInfo.
I've pasted my two classes below.
ParentNode contains the info, and ParentNodeBean contains display information.
Now I'd like to change my BeanDescriptor.DisplayName to ParentNode.getMyName
But I can not figure out how?
Enyone?


public class ParentNodeBeanInfo extends SimpleBeanInfo {
    private final static Class parentNode = ParentNode.class;
 
    @Override
    public Image getIcon(int type) {
       return Utilities.loadImage("/nodeTest/suite.png");
    }
    
    
  @Override
  public BeanDescriptor getBeanDescriptor() {
      BeanDescriptor beanDescriptor = new BeanDescriptor(parentNode);
    beanDescriptor.setDisplayName("Test name");
  //  bd.setDisplayName(parentNode.getTestName()); //<--this is it
    return beanDescriptor;
  }
}
 
public class ParentNode implements Serializable {
 
    private String myName;
    private String testValue;
    private PropertyChangeSupport propertySupport;
 
    public ParentNode() {
        propertySupport = new PropertyChangeSupport(this);
    }
 
    public String getMyName() {
        return myName;
    }
 
    public void setMyName(String myName) {
        String old = this.myName;
        this.myName = myName;
        propertySupport.firePropertyChange("myName", old, this.myName);
    }
 
    public String getTestValue() {
        return testValue;
    }
 
    public void setTestValue(String testValue) {
        this.testValue = testValue;
    }
 
    public void addPropertyChangeListener(PropertyChangeListener listener) {
        propertySupport.addPropertyChangeListener(listener);
    }
 
    public void removePropertyChangeListener(PropertyChangeListener listener) {
        propertySupport.removePropertyChangeListener(listener);
    }
    
    @Override
    public String toString() {
        return "getMyName:" + this.getMyName();
    }

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Question by:kristian_gr
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Expert Comment

by:deeppra
ID: 20288161
But the BeanDescriptor.DisplayName display a gendral information about the bean its not for representing the bean values
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deeppra earned 500 total points
ID: 20288164
For more info
http://www.research.ibm.com/able/doc/reference/com/ibm/able/doc-files/AbleBeanInfo.html
http://javadude.com/articles/javabeanattributes.html



As explained earlier JBuilder discovers the properties, methods and events of a bean through introspection based on the JavaBeans API. If we want to provide more information about a bean, or want to refine the information available through introspection, we should define a class that implement the BeanInfo interface. A BeanInfo class typically subclasses the SimpleBeanInfo class, that is a no-op implementation of the BeanInfo interface. When we want to override only one or two methods in the BeanInfo interface it is easier to subclass SimpleBeanInfo then to implement BeanInfo directly. In order for JBuilder to be able to find the corresponding BeanInfo class to a bean, there is a naming convention to be followed: a BeanInfo class should have the same name as the bean with the string BeanInfo appended.

A BeanInfo class specifies a number of pieces of information for our bean:

    * Icons that represent the bean.
    * A BeanDescriptor object that contains a reference to a Customizer class for the bean. Customizers will be explained later.
    * A list of supported properties of the bean, along with a short description of these properties. These description will be used by JBuilder as tool tips in the Object Inspector.
    * Reference to property editor classes. Property editors will be explained later.
    * A list of methods supported by the bean, again with short descriptions of each one.
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