public IBusinessObjectPropertyPathResult GetResult(
IBusinessObject root,
BusinessObjectPropertyPath.UnreachableValueBehavior unreachableValueBehavior,
BusinessObjectPropertyPath.ListValueBehavior listValueBehavior)
{
return(new NullBusinessObjectPropertyPathResult());
}
private void HandlePropertyValueNull(BusinessObjectPropertyPath.UnreachableValueBehavior unreachableValueBehavior, int propertyIndex)
{
if (unreachableValueBehavior == BusinessObjectPropertyPath.UnreachableValueBehavior.FailForUnreachableValue)
{
throw new InvalidOperationException(
string.Format(
"A null value was returned for property #{0} of property path '{1}'. Cannot evaluate rest of path.", propertyIndex, Identifier));
}
}
public IBusinessObjectPropertyPathResult GetResult(
IBusinessObject root,
BusinessObjectPropertyPath.UnreachableValueBehavior unreachableValueBehavior,
BusinessObjectPropertyPath.ListValueBehavior listValueBehavior)
{
ArgumentUtility.CheckNotNull("root", root);
var propertyEnumerator = GetResultPropertyEnumerator();
var currentObject = root;
int propertyIndex = 0;
while (propertyEnumerator.MoveNext(currentObject.BusinessObjectClass))
{
var currentProperty = propertyEnumerator.Current;
if (currentProperty == null)
{
return(new NullBusinessObjectPropertyPathResult());
}
if (!propertyEnumerator.HasNext)
{
return(new EvaluatedBusinessObjectPropertyPathResult(currentObject, currentProperty));
}
if (!currentProperty.IsAccessible(currentObject))
{
HandlePropertyAccessDenied(unreachableValueBehavior, propertyIndex);
return(new NotAccessibleBusinessObjectPropertyPathResult(currentObject.BusinessObjectClass.BusinessObjectProvider));
}
try
{
currentObject = GetPropertyValue(currentObject, (IBusinessObjectReferenceProperty)currentProperty, listValueBehavior, propertyIndex);
}
catch (BusinessObjectPropertyAccessException)
{
HandlePropertyAccessDenied(unreachableValueBehavior, propertyIndex);
return(new NotAccessibleBusinessObjectPropertyPathResult(currentObject.BusinessObjectClass.BusinessObjectProvider));
}
if (currentObject == null)
{
HandlePropertyValueNull(unreachableValueBehavior, propertyIndex);
return(new NullBusinessObjectPropertyPathResult());
}
propertyIndex++;
}
throw new InvalidOperationException("Property path enumeration can never fall through.");
}
