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
{
		getModule( ).setFileName( newName );
		if ( !StringUtil.isBlank( newName ) )
		{
			URL systemId = URIUtil.getDirectory( newName );
			if ( systemId != null )
				getModule( ).setSystemId( systemId );
		}
		AttributeEvent event = new AttributeEvent( module,
				AttributeEvent.FILE_NAME_ATTRIBUTE );
		module.broadcastFileNameEvent( event );
	}
	/**
	 * Sets an external file that provides help information for the report.
	 * 
	 * @param helpGuide
	 *            the name of an external file
	 */
	public void setHelpGuide( String helpGuide )
	{
		try
		{
			setStringProperty( HELP_GUIDE_PROP, helpGuide );
		}
		catch ( SemanticException e )
		{
			assert false;
		}
	}
	/**