oracle.ide.util
Class EmptyWhenNullMarker

java.lang.Object
  java.lang.Throwable
      java.lang.Exception
          java.lang.RuntimeException
              oracle.ide.util.EmptyWhenNullMarker

All Implemented Interfaces:

java.io.Serializable

public final class EmptyWhenNullMarker

extends java.lang.RuntimeException

The EmptyWhenNullMarker is a special kind of runtime exception that can be declared in the throws clause of a getter method to indicate to the IDE's marshalling code that the property represented by the getter is to be persisted even if the property value is null. Java's ability to annotate methods with metadata at compile-time is very limited. BeanInfo classes tend to be cumbersome and the information in the BeanInfo class can often be overlooked since the BeanInfo code is usually in a separate file and sometimes even in a separate package. By using a "marker exception" in the throws clause of the getter, the fact that the getter represents a transient property is readily apparent, especially once the purpose EmptyWhenNullMarker is understood.

See Also:

Serialized Form

Methods inherited from class java.lang.Throwable

fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait