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/Module.java
* @param module
	 *            the module information needed for the check, and records any
	 *            errors
	 */
	public final void semanticCheck( Module module )
	{
		allExceptions = validateWithContents( module );
		
		if ( module instanceof ReportDesign )
		{
			ContainerSlot slot = module
					.getSlot( ReportDesign.TEMPLATE_PARAMETER_DEFINITION_SLOT );
			assert slot != null;
			for ( int i = slot.getCount( ) - 1; i >= 0; i-- )
			{
				TemplateParameterDefinition templateParam = (TemplateParameterDefinition) slot
						.getContent( i );
				if ( templateParam.getClientList( ).isEmpty( ) )
				{
					slot.remove( templateParam );
					
					
					module.manageId( templateParam, false );
					
					templateParam.setContainer( null, DesignElement.NO_SLOT );
				}
			}
		}
		
		this.nameManager.clear( );