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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <p style="margin: 10px 0 0 0; margin-top: 0">I don't really have any recollection of Chad or anyone discussing anything about this historically, so just going from what I believe right now...</p> <p style="margin: 10px 0 0 0">Yes, I think the (implicit) intent is that <tt>List<XMLObject></tt> for element children should be non-null and contain no null elements.</p> <p style="margin: 10px 0 0 0">Since we don't use getter/setter for these, but rather a getter with a live list, AFAIK the implementations do generally always conform to the non-null constraint.</p> <p style="margin: 10px 0 0 0">The <tt>XMLObjectChildrenList</tt> and <tt>IndexedXMLObjectChildrenList</tt> impls do not allow nulls, so I think we also conform to the non-null elements constraint.</p> <p style="margin: 10px 0 0 0">I don't remember for sure, but it may be that the only reason we don't have these annotation constraints on the various SAML and other interfaces in OpenSAML and elsewhere is simply that we either didn't have the annotations when we started way back in 2005-2006 (at least the @NonnullElements one, which is ours), and/or we just hadn't decided on annotation usage as an important thing yet.</p> <p style="margin: 10px 0 0 0">Note also that for a lot (most? all?) of the original SAML interfaces and impls, we don't use @Nonnull or @Nullable on the singleton children either (getter types or setter args). So I think our switch to heavy annotation usage simply post-dated a lot of the original work. (although we seem to have at some point applied annotations to <tt>XMLObject</tt> itself...)</p> <p style="margin: 10px 0 0 0">So given that, I think it would be appropriate at this point to go back and put annotations on interfaces where they are lacking. Unless we think that the implicit intent is enough vs the work that that would entail.</p> </td>
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