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/ReferencableStructure.java
* Adds a client structure of this.
	 * 
	 * @param struct
	 *            the structure that refers this struct
	 */
	public void addClientStructure( Structure struct )
	{
		clientStructures.add( struct );
	}
	/**
	 * Drops one of the client of this structure.
	 * 
	 * @param struct
	 *            the client to drop
	 */
	public void dropClientStructure( Structure struct )
	{
		assert clientStructures.contains( struct );
		clientStructures.remove( struct );
	}
	/**
	 * Returns all the client structures.
	 * 
	 * @return all the client structures
	 */
	public List getClientStructures( )
	{
		return clientStructures;
	}
}