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 localized description for the module
	 */
	public String getDisplayDescription( )
	{
		return getExternalizedValue( Module.DESCRIPTION_ID_PROP,
				Module.DESCRIPTION_PROP );
	}
	/**
	 * Sets the description of the module. Sets the static description itself.
	 * If the module is to be externalized, then set the description ID
	 * separately.
	 * 
	 * @param description
	 *            the new description for the module
	 * @throws SemanticException
	 *             if the property is locked.
	 */
	public void setDescription( String description ) throws SemanticException
	{
		setStringProperty( Module.DESCRIPTION_PROP, description );
	}
	/**
	 * Returns the resource key of the static description of the module.
	 * 
	 * @return the resource key of the static description
	 */
	public String getDescriptionKey( )
	{
		return getStringProperty( Module.DESCRIPTION_ID_PROP );