XWIKI-7688 : Implement the user preferences configuration source

xwiki-platform-core/xwiki-platform-configuration/xwiki-platform-configuration-default/src/main/java/org/xwiki/configuration/internal/UserPreferencesConfigurationSource.java

@@ -37,20 +37,25 @@
 @Singleton
 public class UserPreferencesConfigurationSource extends AbstractDocumentConfigurationSource
 {
+    /**
+     * Space name of the user class document.
+     */
+    private static final String CLASS_SPACE_NAME = "XWiki";
+
+    /**
+     * Document name of the user class document.
+     */
+    private static final String CLASS_PAGE_NAME = "XWikiUsers";
+
     @Override
     protected DocumentReference getClassReference()
     {
-        // TODO: Not enabled yet. See #getDocumentReference().
-        return null;
+        return new DocumentReference(getCurrentWikiReference().getName(), CLASS_SPACE_NAME, CLASS_PAGE_NAME);
     }
 
     @Override
     protected DocumentReference getDocumentReference()
     {
-        // TODO: Not enabled yet. In order to enable it we need to make modifications so that
-        // DAB.getCurrentUser() returns a DocumentReference and not a String as otherwise it will create
-        // a stackoverflow (circular dependency): in order to create a DocumentReference we would need to
-        // use a factory which would need to use this configuration source.
-        return null;
+        return getDocumentAccessBridge().getCurrentUserReference();
     }
-}
+}
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