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/api/ModuleHandle.java
* @param listener
	 *            the validation listener.
	 */
	public void addValidationListener( IValidationListener listener )
	{
		getModule( ).addValidationListener( listener );
	}
	/**
	 * Checks this whole report. Only one <code>ValidationEvent</code> will be
	 * sent, which contains all error information of this check.
	 */
	public void checkReport( )
	{
		
		module.semanticCheck( module );
		ValidationEvent event = new ValidationEvent( module, null,
				getErrorList( ) );
		module.broadcastValidationEvent( module, event );
	}
	/**
	 * Closes the design. The report design handle is no longer valid after
	 * closing the design. This method will send notifications instance of
	 * <code>DisposeEvent</code> to all the dispose listeners registered in
	 * the module.
	 */
	public void close( )
	{
		module.close( );
		DisposeEvent event = new DisposeEvent( module );
		module.broadcastDisposeEvent( event );