Minor clean up (Codacy again)

Author: devgianlu

api/src/main/java/xyz/gianlu/librespot/api/handlers/MetadataHandler.java

@@ -59,14 +59,15 @@ public void handleRequest(HttpServerExchange exchange) throws Exception {
         try {
             JsonObject obj = handle(type, uri);
             exchange.getResponseSender().send(obj.toString());
-        } catch (IOException | MercuryClient.MercuryException ex) {
-            if (ex instanceof ApiClient.StatusCodeException) {
-                if (((ApiClient.StatusCodeException) ex).code == 404) {
-                    Utils.invalidParameter(exchange, "uri", "404: Unknown uri");
-                    return;
-                }
+        } catch (ApiClient.StatusCodeException ex) {
+            if (ex.code == 404) {
+                Utils.invalidParameter(exchange, "uri", "404: Unknown uri");
+                return;
             }
 
+            Utils.internalError(exchange, ex);
+            LOGGER.error(String.format("Failed handling api request. {type: %s, uri: %s, code: %d}", type, uri, ex.code), ex);
+        } catch (IOException | MercuryClient.MercuryException ex) {
             Utils.internalError(exchange, ex);
             LOGGER.error(String.format("Failed handling api request. {type: %s, uri: %s}", type, uri), ex);
         } catch (IllegalArgumentException ex) {

common/src/main/java/xyz/gianlu/librespot/common/ProtobufToJson.java

@@ -102,6 +102,8 @@ private static void put(JsonObject json, Descriptors.FieldDescriptor descriptor,
                 else if (descriptor.isRepeated()) json.add(key, array((List<? extends Message>) obj));
                 else json.add(key, convert((Message) obj));
                 break;
+            default:
+                throw new IllegalStateException("Unknown type: " + descriptor.getJavaType());
         }
     }
 }

core/src/main/java/xyz/gianlu/librespot/mercury/model/PlayableId.java

@@ -7,6 +7,7 @@
 import xyz.gianlu.librespot.common.Utils;
 
 import java.util.List;
+import java.util.Objects;
 
 /**
  * @author Gianlu
@@ -39,7 +40,8 @@ static PlayableId from(@NotNull Player.ProvidedTrack track) {
     }
 
     static boolean isSupported(@NotNull String uri) {
-        return !uri.startsWith("spotify:local:") && !uri.equals("spotify:delimiter") && !uri.equals("spotify:meta:delimiter");
+        return !uri.startsWith("spotify:local:") && !Objects.equals(uri, "spotify:delimiter")
+                && !Objects.equals(uri, "spotify:meta:delimiter");
     }
 
     static boolean shouldPlay(@NotNull ContextTrack track) {