Adapt to changes in Gerrit API

AccountState#getUserName now returns Optional<String> instead of a
nullable String.

Change-Id: I5333c071f2c14cbbb630398fa954cc404d2d5a77
Signed-off-by: Edwin Kempin <ekempin@google.com>

src/main/java/com/googlesource/gerrit/plugins/singleusergroup/SingleUserGroup.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/singleusergroup/SingleUserGroup.java b/src/main/java/com/googlesource/gerrit/plugins/singleusergroup/SingleUserGroup.java
index 08b11a1..7d495e8 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/singleusergroup/SingleUserGroup.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/singleusergroup/SingleUserGroup.java
@@ -155,8 +155,8 @@
             @Override
             public GroupReference apply(AccountState state) {
               AccountGroup.UUID uuid;
-              if (state.getUserName() != null) {
-                uuid = uuid(state.getUserName());
+              if (state.getUserName().isPresent()) {
+                uuid = uuid(state.getUserName().get());
               } else {
                 uuid = uuid(state.getAccount().getId());
               }
@@ -187,21 +187,21 @@
         uuid.get().startsWith(UUID_PREFIX), "SingleUserGroup does not handle %s", uuid.get());
   }
 
-  private static String nameOf(AccountGroup.UUID uuid, AccountState account) {
+  private static String nameOf(AccountGroup.UUID uuid, AccountState accountState) {
     StringBuilder buf = new StringBuilder();
-    if (account.getAccount().getFullName() != null) {
-      buf.append(account.getAccount().getFullName());
+    if (accountState.getAccount().getFullName() != null) {
+      buf.append(accountState.getAccount().getFullName());
     }
-    if (account.getUserName() != null) {
+    if (accountState.getUserName().isPresent()) {
       if (buf.length() > 0) {
-        buf.append(" (").append(account.getUserName()).append(")");
+        buf.append(" (").append(accountState.getUserName().get()).append(")");
       } else {
-        buf.append(account.getUserName());
+        buf.append(accountState.getUserName().get());
       }
     } else if (buf.length() > 0) {
-      buf.append(" (").append(account.getAccount().getId().get()).append(")");
+      buf.append(" (").append(accountState.getAccount().getId().get()).append(")");
     } else {
-      buf.append(account.getAccount().getId().get());
+      buf.append(accountState.getAccount().getId().get());
     }
 
     String ident = username(uuid);