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/DesignElement.java
return errors;
	}
	/**
	 * Checks all structures in the specific property whose type is structure
	 * list property type. This method is used for element semantic check. The
	 * error is kept in the report design's error list.
	 * 
	 * @param module
	 *            the module
	 * @param propName
	 *            the name of the structure list type
	 * @return the list of the errors found in validation, each of which is the
	 *         <code>SemanticException</code> object.
	 */
	protected List validateStructureList( Module module, String propName )
	{
		return StructureListValidator.getInstance( ).validate( module, this,
				propName );
	}
	/**
	 * Checks all structures in the specific property whose type is structure
	 * list property type. This method is used in command. If any error is
	 * found, the exception will be thrown.
	 * 
	 * @param module
	 *            the module
	 * @param propDefn
	 *            the property definition of the list property
	 * @param list
	 *            the structure list to check