Accessing objects and navigating meta-levels in code
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Then one can write; | Then one can write; | ||
if ((destinationMember as IObjectReference).ObjectInstance == null) | if ((destinationMember as IObjectReference).ObjectInstance.asObject == null) | ||
I.e. the member as a single link - does it have an object in the other end? | I.e. the member as a single link - does it have an object in the other end? | ||
Note! ObjectInstance is always non-null, it's the object holding information about the link-end. It can be a nullObjectImpl, which is an object | |||
Revision as of 16:16, 1 September 2019
Single-link
A single link in runtime is implemented in a IObject as a IObjectReference, i.e. a link which points to another object.
Then one can write;
if ((destinationMember as IObjectReference).ObjectInstance.asObject == null)
I.e. the member as a single link - does it have an object in the other end?
Note! ObjectInstance is always non-null, it's the object holding information about the link-end. It can be a nullObjectImpl, which is an object
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