Does .remove on a document object result in a null?

Question

In my java webagent I create a Document object. For example NotesDocument document = ...; later I use remove on this object:

document.remove(true);

Afterwards I want to check if document is null so any functions which normally operates on that document will not be executed

for example:

if(document != null){
System.out.println(document.getItemValueString("ID"));
}

It still goes into the if statement and its saying: NotesException: Object has been removed or recycled.

Is != null functioning in this case?

Answer 1

You already created a reference in the memory here.

NotesDocument document = ...;

...

// Even you called document.remove(), it still exists because the code does not destroy the object and reference itself.

document.remove(true);

// That is why this still works.
if (document != null) {
    System.out.println(document.getItemValueString("ID"));
}

You can explicitly assign document = null; after you call remove() if that is what you are designated to do.

Or

You can check isDeleted() of document. e.g. if (!document.isDeleted()).

Doc: https://www.ibm.com/support/knowledgecenter/en/SSVRGU_9.0.1/reference/r_domino_Document_IsDeleted.html