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
{
		ElementPropertyDefn propDefn = module
				.getPropertyDefn( CONFIG_VARS_PROP );
		if ( configVar != null && StringUtil.isBlank( configVar.getName( ) ) )
		{
			throw new PropertyValueException( getElement( ), propDefn,
					configVar,
					PropertyValueException.DESIGN_EXCEPTION_INVALID_VALUE );
		}
		if ( configVar != null
				&& findConfigVariable( configVar.getName( ) ) != null )
		{
			throw new PropertyValueException( getElement( ), propDefn,
					configVar.getName( ),
					PropertyValueException.DESIGN_EXCEPTION_VALUE_EXISTS );
		}
		PropertyCommand cmd = new PropertyCommand( getModule( ), getElement( ) );
		cmd.addItem( new CachedMemberRef( propDefn ), configVar );
	}
	/**
	 * Adds a new embedded image.
	 * 
	 * @param image
	 *            the image to add
	 * @throws SemanticException
	 *             if the name is empty, type is invalid, or the same name
	 *             exists.
	 */
	public void addImage( EmbeddedImage image ) throws SemanticException
	{