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 oldVar
	 *            the old config variable
	 * @param newVar
	 *            the new config variable
	 * @throws SemanticException
	 *             if the old config variable is not found or the name of new
	 *             one is empty.
	 * 
	 */
	public void replaceConfigVariable( ConfigVariable oldVar,
			ConfigVariable newVar ) throws SemanticException
	{
		replaceObjectInList( CONFIG_VARS_PROP, oldVar, newVar );
	}
	/**
	 * Replaces the old embedded image with the new one.
	 * 
	 * @param oldVar
	 *            the old embedded image
	 * @param newVar
	 *            the new embedded image
	 * @throws SemanticException
	 *             if the old image is not found or the name of new one is
	 *             empty.
	 */
	public void replaceImage( EmbeddedImage oldVar, EmbeddedImage newVar )
			throws SemanticException
	{
		replaceObjectInList( IMAGES_PROP, oldVar, newVar );