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
* @return the <code>CssStyleSheetHandle</code> if the external resource
	 *         is successfully loaded
	 * @throws StyleSheetException
	 *             thrown if the resource is not found, or there are syntax
	 *             errors in the resource
	 */
	public CssStyleSheetHandle openCssStyleSheet( String fileName )
			throws StyleSheetException
	{
		StyleSheetLoader loader = new StyleSheetLoader( );
		return loader.load( module, fileName ).handle( module );
	}
	/**
	 * Gets the result style sheet with given file name of an external CSS2
	 * resource.
	 * 
	 * @param is
	 *            the input stream of the resource
	 * @return the <code>CssStyleSheetHandle</code> if the external resource
	 *         is successfully loaded
	 * @throws StyleSheetException
	 *             thrown if the resource is not found, or there are syntax
	 *             errors in the resource
	 */
	public CssStyleSheetHandle openCssStyleSheet( InputStream is )
			throws StyleSheetException
	{
		StyleSheetLoader loader = new StyleSheetLoader( );
		return loader.load( module, is ).handle( module );
	}