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/metadata/ElementDefn.java
* @param ns
	 *            The name space ID.
	 */
	void setNameSpaceID( int ns )
	{
		assert !isBuilt;
		nameSpaceID = ns;
		if ( nameSpaceID == MetaDataConstants.NO_NAME_SPACE )
			nameOption = MetaDataConstants.NO_NAME;
	}
	/**
	 * Sets the name option for the element. One of the following constants
	 * defined in {@link MetaDataConstants MetaDataConstants}:
	 * {@link MetaDataConstants#NO_NAME},
	 * {@link MetaDataConstants#OPTIONAL_NAME}, or
	 * {@link MetaDataConstants#REQUIRED_NAME}.
	 * 
	 * @param choice
	 *            The name option.
	 */
	void setNameOption( int choice )
	{
		nameOption = choice;
	}
	/**
	 * Sets whether the user can extend elements of this type.
	 * 
	 * @param flag
	 *            True if the element can be extended (default), or false if the
	 *            element cannot be extended.