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/PropertySearchStrategy.java
{
	/**
	 * Default strategy instance.
	 */
	private final static PropertySearchStrategy instance = new PropertySearchStrategy( );
	/**
	 * Protected constructor.
	 */
	protected PropertySearchStrategy( )
	{
	}
	/**
	 * Returns the instance of <code>PropertySearchStrategy</code> which
	 * provide the specific property searching route for most design elements.