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<td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"><a href="https://shibboleth.atlassian.net/browse/JSSH?atlOrigin=eyJpIjoiYTcwM2ZkYTE0YWUxNGZiOTk5MmQ2MGVhOWM1Y2YyMWEiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Shibboleth Shared - Java</a> / <a href="https://shibboleth.atlassian.net/browse/JSSH-27?atlOrigin=eyJpIjoiYTcwM2ZkYTE0YWUxNGZiOTk5MmQ2MGVhOWM1Y2YyMWEiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-182d8c4b-4c39-4bab-a37b-792b6b27530c" height="16" width="16" border="0" align="absmiddle" alt="New Feature" style="vertical-align: text-bottom"></a> <a href="https://shibboleth.atlassian.net/browse/JSSH-27?atlOrigin=eyJpIjoiYTcwM2ZkYTE0YWUxNGZiOTk5MmQ2MGVhOWM1Y2YyMWEiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">JSSH-27</a></td>
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<td style="vertical-align: top;; padding: 0; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"><span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://shibboleth.atlassian.net/browse/JSSH-27?atlOrigin=eyJpIjoiYTcwM2ZkYTE0YWUxNGZiOTk5MmQ2MGVhOWM1Y2YyMWEiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Implement an ensureId method to help with nullability annotation</a> </span></td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Issue Type:</th>
<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"><img src="cid:jira-generated-image-avatar-182d8c4b-4c39-4bab-a37b-792b6b27530c" height="16" width="16" border="0" align="absmiddle" alt="New Feature" style="vertical-align: text-bottom"> New Feature</td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top">18/Apr/23 12:16 PM</td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"><img src="cid:jira-generated-image-static-trivial-90ea5980-53b5-4584-a1d8-84549135b940" height="16" width="16" border="0" align="absmiddle" alt="Trivial" style="vertical-align: text-bottom"> Trivial</td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"><a class="user-hover" rel="557058:e127cb03-43ed-473d-b6ba-592949cb4be8" style="color:#3b73af;; color: #3b73af; text-decoration: none" id="email_557058:e127cb03-43ed-473d-b6ba-592949cb4be8" href="https://shibboleth.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3Ae127cb03-43ed-473d-b6ba-592949cb4be8"> Ian Young </a></td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"><p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">One of the things I’ve hit multiple times when trying to get code null-clean is that in our component system, <tt>getId}}is (correctly) labelled as {{@NonnullAfterInit</tt> but of course is always null in the normal course of execution where you want to pass it to a method which now requires <tt>@Nonnull</tt>. I've tried several bodges to work round this in various places, but I'm not fond of most of them.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">My proposal is that we add the following method to <tt>AbstractIdentifiedInitializableComponent</tt> alongside <tt>getId</tt>:</p>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal"> <span class="code-keyword" style="color: #000091">protected</span> @Nonnull <span class="code-object" style="color: #910091">String</span> ensureId() {
<span class="code-keyword" style="color: #000091">final</span> <span class="code-keyword" style="color: #000091">var</span> id = getId();
<span class="code-keyword" style="color: #000091">if</span> (id == <span class="code-keyword" style="color: #000091">null</span>) {
<span class="code-keyword" style="color: #000091">throw</span> <span class="code-keyword" style="color: #000091">new</span> IllegalStateException();
}
<span class="code-keyword" style="color: #000091">return</span> id;
}</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">(Name suggested by Scott)</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Note that I am suggesting that we add this to the <em>implementation</em> and not to the <em>interface</em> <tt>IdentifiedComponent</tt> where <tt>getId</tt> is declared. It would then be inherited by (hopefully) most or all of the code where we’re doing null checking without forcing any other places that implement <tt>IdentifiedComponent</tt> to be changed. I suppose an alternative would be to to add it as a default method to the interface, but I’m a little wary of that because I haven’t used that construct a lot.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">I’m going to start by implementing this in a couple of places in the abstract class hierarchies in the MDA, but ideally we’d put this as high up as it can go, which means JSSE.</p></td>
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