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/command/PropertyCommand.java
{
	/**
	 * Constructor.
	 * 
	 * @param module
	 *            the root of <code>obj</code>
	 * @param obj
	 *            the element to modify.
	 */
	public PropertyCommand( Module module, DesignElement obj )
	{
		super( module, obj );
	}
	/**
	 * Sets the value of a property.
	 * 
	 * @param propName
	 *            the internal name of the property to set.
	 * @param value
	 *            the new property value.
	 * @throws SemanticException
	 *             if the property is not found.
	 */
	public void setProperty( String propName, Object value )
			throws SemanticException