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
* @param prop
	 *            definition of the property to set
	 * @param value
	 *            the property value to set.
	 * @throws SemanticException
	 *             if failed to set property.
	 */
	private void setIntrinsicProperty( ElementPropertyDefn prop, Object value )
			throws SemanticException
	{
		String propName = prop.getName( );
		if ( DesignElement.NAME_PROP.equals( propName ) )
		{
			String name = (String) value;
			NameCommand cmd = new NameCommand( module, element );
			cmd.setName( name );
		}
		else if ( DesignElement.EXTENDS_PROP.equals( propName ) )
		{
			ExtendsCommand cmd = new ExtendsCommand( module, element );
			cmd.setExtendsRefValue( (ElementRefValue) value );
		}
		else if ( StyledElement.STYLE_PROP.equals( propName ) )
		{
			
			StyleCommand cmd = new StyleCommand( module, element );
			cmd.setStyleRefValue( (ElementRefValue) value );
		}
		else if ( ReportDesign.UNITS_PROP.equals( propName ) )
		{