[android] - validate if weakreference is still valid

1 files changed, 51 insertions, 12 deletions

diff --git a/platform/android/src/native_map_view.cpp b/platform/android/src/native_map_view.cpp
index 5b23076441..872022c8e4 100755
--- a/platform/android/src/native_map_view.cpp
+++ b/platform/android/src/native_map_view.cpp
@@ -101,16 +101,23 @@ void NativeMapView::onCameraWillChange(MapObserver::CameraChangeMode mode) {
     android::UniqueEnv _env = android::AttachEnv();
     static auto& javaClass = jni::Class<NativeMapView>::Singleton(*_env);
     static auto onCameraWillChange = javaClass.GetMethod<void (jboolean)>(*_env, "onCameraWillChange");
-    javaPeer.get(*_env).Call(*_env, onCameraWillChange, (jboolean) (mode != MapObserver::CameraChangeMode::Immediate));
+    auto weakReference = javaPeer.get(*_env);
+    if (weakReference) {
+        weakReference.Call(*_env, onCameraWillChange, (jboolean) (mode != MapObserver::CameraChangeMode::Immediate));
+    }
 }
 
+
 void NativeMapView::onCameraIsChanging() {
     assert(vm != nullptr);
 
     android::UniqueEnv _env = android::AttachEnv();
     static auto& javaClass = jni::Class<NativeMapView>::Singleton(*_env);
     static auto onCameraIsChanging = javaClass.GetMethod<void ()>(*_env, "onCameraIsChanging");
-    javaPeer.get(*_env).Call(*_env, onCameraIsChanging);
+    auto weakReference = javaPeer.get(*_env);
+    if (weakReference) {
+        weakReference.Call(*_env, onCameraIsChanging);
+    }
 }
 
 void NativeMapView::onCameraDidChange(MapObserver::CameraChangeMode mode) {
@@ -119,7 +126,11 @@ void NativeMapView::onCameraDidChange(MapObserver::CameraChangeMode mode) {
     android::UniqueEnv _env = android::AttachEnv();
     static auto& javaClass = jni::Class<NativeMapView>::Singleton(*_env);
     static auto onCameraDidChange = javaClass.GetMethod<void (jboolean)>(*_env, "onCameraDidChange");
-    javaPeer.get(*_env).Call(*_env, onCameraDidChange, (jboolean) (mode != MapObserver::CameraChangeMode::Immediate));
+    auto weakReference = javaPeer.get(*_env);
+    if (weakReference) {
+        weakReference.Call(*_env, onCameraDidChange,
+                                 (jboolean) (mode != MapObserver::CameraChangeMode::Immediate));
+    }
 }
 
 void NativeMapView::onWillStartLoadingMap() {
@@ -128,7 +139,10 @@ void NativeMapView::onWillStartLoadingMap() {
     android::UniqueEnv _env = android::AttachEnv();
     static auto& javaClass = jni::Class<NativeMapView>::Singleton(*_env);
     static auto onWillStartLoadingMap = javaClass.GetMethod<void ()>(*_env, "onWillStartLoadingMap");
-    javaPeer.get(*_env).Call(*_env, onWillStartLoadingMap);
+    auto weakReference = javaPeer.get(*_env);
+    if (weakReference) {
+        weakReference.Call(*_env, onWillStartLoadingMap);
+    }
 }
 
 void NativeMapView::onDidFinishLoadingMap() {
@@ -137,7 +151,11 @@ void NativeMapView::onDidFinishLoadingMap() {
     android::UniqueEnv _env = android::AttachEnv();
     static auto& javaClass = jni::Class<NativeMapView>::Singleton(*_env);
     static auto onDidFinishLoadingMap = javaClass.GetMethod<void ()>(*_env, "onDidFinishLoadingMap");
-    javaPeer.get(*_env).Call(*_env, onDidFinishLoadingMap);}
+    auto weakReference = javaPeer.get(*_env);
+    if (weakReference) {
+        weakReference.Call(*_env, onDidFinishLoadingMap);
+    }
+}
 
 void NativeMapView::onDidFailLoadingMap(std::exception_ptr exceptionPtr) {
     assert(vm != nullptr);
@@ -146,7 +164,10 @@ void NativeMapView::onDidFailLoadingMap(std::exception_ptr exceptionPtr) {
     static auto& javaClass = jni::Class<NativeMapView>::Singleton(*_env);
     static auto onDidFailLoadingMap = javaClass.GetMethod<void (jni::String)>(*_env, "onDidFailLoadingMap");
     std::string error = mbgl::util::toString(exceptionPtr);
-    javaPeer.get(*_env).Call(*_env, onDidFailLoadingMap, jni::Make<jni::String>(*_env, error));
+    auto weakReference = javaPeer.get(*_env);
+    if (weakReference) {
+        weakReference.Call(*_env, onDidFailLoadingMap, jni::Make<jni::String>(*_env, error));
+    }
 }
 
 void NativeMapView::onWillStartRenderingFrame() {
@@ -155,7 +176,10 @@ void NativeMapView::onWillStartRenderingFrame() {
     android::UniqueEnv _env = android::AttachEnv();
     static auto& javaClass = jni::Class<NativeMapView>::Singleton(*_env);
     static auto onWillStartRenderingFrame = javaClass.GetMethod<void ()>(*_env, "onWillStartRenderingFrame");
-    javaPeer.get(*_env).Call(*_env, onWillStartRenderingFrame);
+    auto weakReference = javaPeer.get(*_env);
+    if (weakReference) {
+        weakReference.Call(*_env, onWillStartRenderingFrame);
+    }
 }
 
 void NativeMapView::onDidFinishRenderingFrame(MapObserver::RenderMode mode) {
@@ -164,7 +188,10 @@ void NativeMapView::onDidFinishRenderingFrame(MapObserver::RenderMode mode) {
     android::UniqueEnv _env = android::AttachEnv();
     static auto& javaClass = jni::Class<NativeMapView>::Singleton(*_env);
     static auto onDidFinishRenderingFrame = javaClass.GetMethod<void (jboolean)>(*_env, "onDidFinishRenderingFrame");
-    javaPeer.get(*_env).Call(*_env, onDidFinishRenderingFrame, (jboolean) (mode != MapObserver::RenderMode::Partial));
+    auto weakReference = javaPeer.get(*_env);
+    if (weakReference) {
+        weakReference.Call(*_env, onDidFinishRenderingFrame, (jboolean) (mode != MapObserver::RenderMode::Partial));
+    }
 }
 
 
@@ -174,7 +201,10 @@ void NativeMapView::onWillStartRenderingMap() {
     android::UniqueEnv _env = android::AttachEnv();
     static auto& javaClass = jni::Class<NativeMapView>::Singleton(*_env);
     static auto onWillStartRenderingMap = javaClass.GetMethod<void ()>(*_env, "onWillStartRenderingMap");
-    javaPeer.get(*_env).Call(*_env, onWillStartRenderingMap);
+    auto weakReference = javaPeer.get(*_env);
+    if (weakReference) {
+        weakReference.Call(*_env, onWillStartRenderingMap);
+    }
 }
 
 void NativeMapView::onDidFinishRenderingMap(MapObserver::RenderMode mode) {
@@ -183,7 +213,10 @@ void NativeMapView::onDidFinishRenderingMap(MapObserver::RenderMode mode) {
     android::UniqueEnv _env = android::AttachEnv();
     static auto& javaClass = jni::Class<NativeMapView>::Singleton(*_env);
     static auto onDidFinishRenderingMap = javaClass.GetMethod<void (jboolean)>(*_env, "onDidFinishRenderingMap");
-    javaPeer.get(*_env).Call(*_env, onDidFinishRenderingMap, (jboolean) (mode != MapObserver::RenderMode::Partial));
+    auto weakReference = javaPeer.get(*_env);
+    if (weakReference) {
+        weakReference.Call(*_env, onDidFinishRenderingMap, (jboolean) (mode != MapObserver::RenderMode::Partial));
+    }
 }
 
 void NativeMapView::onDidBecomeIdle() {
@@ -201,7 +234,10 @@ void NativeMapView::onDidFinishLoadingStyle() {
     android::UniqueEnv _env = android::AttachEnv();
     static auto& javaClass = jni::Class<NativeMapView>::Singleton(*_env);
     static auto onDidFinishLoadingStyle = javaClass.GetMethod<void ()>(*_env, "onDidFinishLoadingStyle");
-    javaPeer.get(*_env).Call(*_env, onDidFinishLoadingStyle);
+    auto weakReference = javaPeer.get(*_env);
+    if (weakReference) {
+        weakReference.Call(*_env, onDidFinishLoadingStyle);
+    }
 }
 
 void NativeMapView::onSourceChanged(mbgl::style::Source& source) {
@@ -211,7 +247,10 @@ void NativeMapView::onSourceChanged(mbgl::style::Source& source) {
     static auto& javaClass = jni::Class<NativeMapView>::Singleton(*_env);
     static auto onSourceChanged = javaClass.GetMethod<void (jni::String)>(*_env, "onSourceChanged");
     auto sourceId = jni::Make<jni::String>(*_env, source.getID());
-    javaPeer.get(*_env).Call(*_env, onSourceChanged, sourceId);
+    auto weakReference = javaPeer.get(*_env);
+    if (weakReference) {
+        weakReference.Call(*_env, onSourceChanged, sourceId);
+    }
 }
 
 // JNI Methods //