Getting all the getter methods from a java bean

Vaadin 6 / 7 / 8 Framework Data Binding
1

Hey,

I have a question. Suppose you have an unknown java bean given to you. Is there anyway by which you can add all these attributes to a label and without knowing the name of the attributes.

For example,


public class personBean
{
      String firstName;
      //... Other properties in the person Bean

      public void setFirstName(String firstName)
      {
            this.firstName = firstName;
      }
      
      public String getName()
      {
            return this.firstName; 
      }

       //...............More accessor methods for all other attributes included in personBean
}

Is there any way by which i can make a label containing all attributes/variables of an unknown java bean? Is there a particular method by which i can get a collection of all the methods used in the unknown bean object?

Any help would be greatly appreciated.

Cheers,
Rohith

2

You could use the bean methods provided in the java.beans package, for example Introspector.getBeanInfo(beanClass). But if you wanted to do it using some tools provided in Vaadin, you could use a BeanItem. Here is one solution:

StringBuffer beanValues = new StringBuffer();
BeanItem bi = new BeanItem(personBean);
for (Object propertyId : bi.getItemPropertyIds()) {
    beanValues.append(propertyId);
    beanValues.append("=");
    beanValues.append(bi.getItemProperty(propertyId).getValue());
    beanValues.append("\n");
}
Label values = new Label(beanValues.toString());

Be sure to check out the sources of MethodProperty, BeanItem and BeanItemContainer to see how it is done.

EDIT: I always forget that getValue() :slight_smile:

3

Thanks,

I will be sure to check that out.

Rohith