From c7bf0a6b641c979179855e1a498af43585e8b51f Mon Sep 17 00:00:00 2001
From: kevin <kevin.li@mapbox.com>
Date: Mon, 23 Mar 2020 10:27:36 +0800
Subject: Fix review comments

---
 .../android/src/snapshotter/map_snapshotter.cpp     | 21 ++++++++++-----------
 .../android/src/snapshotter/map_snapshotter.hpp     |  2 +-
 2 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/platform/android/src/snapshotter/map_snapshotter.cpp b/platform/android/src/snapshotter/map_snapshotter.cpp
index f3884efb30..adf654cb10 100644
--- a/platform/android/src/snapshotter/map_snapshotter.cpp
+++ b/platform/android/src/snapshotter/map_snapshotter.cpp
@@ -70,7 +70,6 @@ MapSnapshotter::~MapSnapshotter() {
         weakScheduler->schedule([ptr = snapshotter.release()]() mutable {
             if (ptr) {
                 delete ptr;
-                ptr = nullptr;
             }
         });
     }
@@ -191,10 +190,10 @@ void MapSnapshotter::onStyleImageMissing(const std::string& imageName) {
 
 void MapSnapshotter::addLayerAt(JNIEnv& env, jlong nativeLayerPtr, jni::jint index) {
     assert(nativeLayerPtr != 0);
-    auto layers = snapshotter->getStyle().getLayers();
+    const auto layers = snapshotter->getStyle().getLayers();
     auto* layer = reinterpret_cast<Layer*>(nativeLayerPtr);
     // Check index
-    int numLayers = layers.size() - 1;
+    const int numLayers = layers.size() - 1;
     if (index > numLayers || index < 0) {
         Log::Error(Event::JNI, "Index out of range: %i", index);
         jni::ThrowNew(env,
@@ -229,27 +228,27 @@ void MapSnapshotter::addLayerAbove(JNIEnv& env, jlong nativeLayerPtr, const jni:
     auto* layer = reinterpret_cast<Layer*>(nativeLayerPtr);
 
     // Find the sibling
-    auto layers = snapshotter->getStyle().getLayers();
+    const auto layers = snapshotter->getStyle().getLayers();
     auto siblingId = jni::Make<std::string>(env, above);
 
     size_t index = 0;
-    for (auto l : layers) {
+    for (auto* l : layers) {
+        ++index;
         if (l->getID() == siblingId) {
             break;
         }
-        index++;
     }
 
     // Check if we found a sibling to place before
     mbgl::optional<std::string> before;
-    if (index + 1 > layers.size()) {
+    if (index > layers.size()) {
         // Not found
         jni::ThrowNew(env,
                       jni::FindClass(env, "com/mapbox/mapboxsdk/style/layers/CannotAddLayerException"),
                       std::string("Could not find layer: ").append(siblingId).c_str());
-    } else if (index + 1 < layers.size()) {
+    } else if (index < layers.size()) {
         // Place before the sibling
-        before = {layers.at(index + 1)->getID()};
+        before = {layers.at(index)->getID()};
     }
 
     // Add the layer
@@ -309,13 +308,13 @@ void MapSnapshotter::registerNative(jni::JNIEnv& env) {
                                                           const jni::String&>,
                                             "nativeInitialize",
                                             "finalize",
-                                            METHOD(&MapSnapshotter::setStyleUrl, "nativeSetStyleUrl"),
+                                            METHOD(&MapSnapshotter::setStyleUrl, "setStyleUrl"),
                                             METHOD(&MapSnapshotter::addLayerAt, "nativeAddLayerAt"),
                                             METHOD(&MapSnapshotter::addLayerBelow, "nativeAddLayerBelow"),
                                             METHOD(&MapSnapshotter::addLayerAbove, "nativeAddLayerAbove"),
                                             METHOD(&MapSnapshotter::addSource, "nativeAddSource"),
                                             METHOD(&MapSnapshotter::addImages, "nativeAddImages"),
-                                            METHOD(&MapSnapshotter::setStyleJson, "nativeSetStyleJson"),
+                                            METHOD(&MapSnapshotter::setStyleJson, "setStyleJson"),
                                             METHOD(&MapSnapshotter::setSize, "setSize"),
                                             METHOD(&MapSnapshotter::setCameraPosition, "setCameraPosition"),
                                             METHOD(&MapSnapshotter::setRegion, "setRegion"),
diff --git a/platform/android/src/snapshotter/map_snapshotter.hpp b/platform/android/src/snapshotter/map_snapshotter.hpp
index 00b0f1c72e..c7a9ce14ad 100644
--- a/platform/android/src/snapshotter/map_snapshotter.hpp
+++ b/platform/android/src/snapshotter/map_snapshotter.hpp
@@ -37,7 +37,7 @@ public:
                    jni::jboolean showLogo,
                    const jni::String& localIdeographFontFamily);
 
-    virtual ~MapSnapshotter();
+    virtual ~MapSnapshotter() override;
 
     void setStyleUrl(JNIEnv&, const jni::String& styleURL);
 
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