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/metadata/PropertyValueException.java
* choice set.
	 */
	public static final String DESIGN_EXCEPTION_CHOICE_NOT_FOUND = MessageConstants.PROPERTY_VALUE_EXCEPTION_CHOICE_NOT_FOUND;
	/**
	 * Error code constant indicating that the property is not a list type.
	 */
	public static final String DESIGN_EXCEPTION_NOT_LIST_TYPE = MessageConstants.PROPERTY_VALUE_EXCEPTION_NOT_LIST_TYPE;
	/**
	 * Error code constant indicating that the item is not found in a list.
	 */
	public static final String DESIGN_EXCEPTION_ITEM_NOT_FOUND = MessageConstants.PROPERTY_VALUE_EXCEPTION_ITEM_NOT_FOUND;
	/**
	 * Error code constant indicating that the item is not type of structure
	 * list referred.
	 */
	public static final String DESIGN_EXCEPTION_WRONG_ITEM_TYPE = MessageConstants.PROPERTY_VALUE_EXCEPTION_WRONG_ITEM_TYPE;
	/**
	 * Error code constant indicating that the elements are of different types.
	 */
	public static final String DESIGN_EXCEPTION_WRONG_ELEMENT_TYPE = MessageConstants.PROPERTY_VALUE_EXCEPTION_WRONG_ELEMENT_TYPE;
	/**
	 * Error code constant indicating that the property value already exists.
	 */
	public static final String DESIGN_EXCEPTION_VALUE_EXISTS = MessageConstants.PROPERTY_VALUE_EXCEPTION_VALUE_EXISTS;
	/**
	 * Error code constant indicating that the property value is required.
	 */
	public static final String DESIGN_EXCEPTION_VALUE_REQUIRED = MessageConstants.PROPERTY_VALUE_EXCEPTION_VALUE_REQUIRED;
	/**
	 * Error code constant indicating that property has been locked in a base