Customizing PropertySuppressionStrategy to use Java 5 Annotations

Suppose we want to mark properties to be serialized with Java 5 @Persistent annotation. So our bean code will look somewhat like this:

{{{public class Person {

• private String name; @Persistent public String getName() {
  • return name;
  } public void setName(String name) {
  • this.name = name;
  }

} }}}

Here is one way of doing that

First define annotation: {{{@Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) public static @interface Persistent { } }}}

Then replace the default PropertySuppressionStrategy with our custom one: {{{beanWriter.getXMLIntrospector().getConfiguration().setPropertySuppressionStrategy(new PropertySuppressionStrategy() {

• @Override public boolean suppressProperty(Class classContainingTheProperty, Class propertyType, String propertyName) {
  • boolean res = true;

    PropertyDescriptor[] pds; try {

    • pds = Introspector.getBeanInfo(classContainingTheProperty).getPropertyDescriptors();

    } catch (IntrospectionException e) {

    • throw new Error(e);
    }

    for (int i = 0; i < pds.length; i++) {

    • if (pds[i].getName().equals(propertyName) && pds[i].getReadMethod().isAnnotationPresent(Persistent.class)) {

      • res = false; break;
      }
    } return res;
  }

}); }}}