Bug 149251 Inconsistent Handling of a Non-inheritable ROM Property
For a ROM property defined to be non-inheritable, an empty string property value should be consistently handled as an empty string, not as null. For example, an oda.dataSource extension defines a data source property with canInherit=false. When a oda-data-source handle get saved in a report design, it correctly includes the tag for such property, even when an empty string value is specified. <oda-data-source extensionID="my.oda.plugin" name="my Data Source" id="24"> ... <property name="ApplicationServer"></property> </oda-data-source> However, later when using the DE API to read its property value, a null is returned. Then when the report design is subsequently saved, the property tag is lost. Expects that an empty string value of a non-inhertiable property should be preserved.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
if ( validationListeners == null )
			return false;
		return validationListeners.remove( listener );
	}
	/**
	 * Broadcasts the validation event to validation listeners.
	 * 
	 * @param element
	 *            the validated element
	 * @param event
	 *            the validation event
	 */
	public void broadcastValidationEvent( DesignElement element,
			ValidationEvent event )
	{
		if ( validationListeners != null )
		{
			Iterator iter = validationListeners.iterator( );
			while ( iter.hasNext( ) )
			{
				IValidationListener listener = (IValidationListener) iter
						.next( );
				listener.elementValidated( element.getHandle( this ), event );
			}
		}
	}
	/**
	 * Makes a unique name for an element. There are several cases.
	 * <p>
	 * <dl>