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/util/PropertyValueValidationUtil.java
*             if <code>propValue</code> is invalid.
	 */
	public static Object validateProperty( DesignElementHandle element,
			String propName, Object propValue ) throws SemanticException
	{
		ElementPropertyDefn propDefn = (ElementPropertyDefn) element
				.getPropertyDefn( propName );
		if ( propDefn == null )
			throw new PropertyNameException( element.getElement( ), propName );
		Object retValue = null;
		switch ( propDefn.getTypeCode( ) )
		{
			case IPropertyType.EXTENDS_TYPE :
				throw new PropertyValueException( propValue,
						PropertyValueException.DESIGN_EXCEPTION_INVALID_VALUE,
						propDefn.getTypeCode( ) );			
			case IPropertyType.STRUCT_TYPE :
				if ( propDefn.isList( ) )
					retValue = validateList( element, propDefn, propValue );
				else
					retValue = validateStructure( element, propDefn, propValue );
				break;
			default :
				retValue = propDefn.validateValue( element.getModule( ),
						propValue );
		}
		return retValue;
	}
}