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
while ( iter.hasNext( ) )
			{
				IAttributeListener listener = (IAttributeListener) iter.next( );
				listener.fileNameChanged( (ModuleHandle) getHandle( this ),
						event );
			}
		}
	}
	/**
	 * Adds one dispose listener. The duplicate listener will not be added.
	 * 
	 * @param listener
	 *            the dispose listener to add
	 */
	public void addDisposeListener( IDisposeListener listener )
	{
		if ( disposeListeners == null )
			disposeListeners = new ArrayList( );
		if ( !disposeListeners.contains( listener ) )
			disposeListeners.add( listener );
	}
	/**
	 * Removes one dispose listener. If the listener not registered, then the
	 * request is silently ignored.
	 * 
	 * @param listener
	 *            the dispose listener to remove
	 * @return <code>true</code> if <code>listener</code> is successfully
	 *         removed. Otherwise <code>false</code>.
	 *