Move JNI bindings code from mapbox-gl-native to this repo. (#301)

MapboxGLAndroidSDK/src/cpp/style/layers/custom_layer.hpp

@@ -0,0 +1,41 @@
+#pragma once
+
+#include <jni/jni.hpp>
+#include <mbgl/gl/custom_layer.hpp>
+#include <mbgl/gl/custom_layer_factory.hpp>
+#include "layer.hpp"
+
+namespace mbgl {
+namespace android {
+
+class CustomLayer : public Layer {
+public:
+    using SuperTag = Layer;
+    static constexpr auto Name() { return "com/mapbox/mapboxsdk/style/layers/CustomLayer"; };
+
+    static void registerNative(jni::JNIEnv&);
+
+    CustomLayer(jni::JNIEnv&, const jni::String&, jni::jlong);
+    CustomLayer(mbgl::style::CustomLayer&);
+    CustomLayer(std::unique_ptr<mbgl::style::CustomLayer>);
+    ~CustomLayer();
+
+    jni::Local<jni::Object<Layer>> createJavaPeer(jni::JNIEnv&);
+}; // class CustomLayer
+
+class CustomJavaLayerPeerFactory final : public JavaLayerPeerFactory,  public mbgl::CustomLayerFactory {
+public:
+    ~CustomJavaLayerPeerFactory() override;
+
+    // JavaLayerPeerFactory overrides.
+    jni::Local<jni::Object<Layer>> createJavaLayerPeer(jni::JNIEnv&, mbgl::style::Layer&) final;
+    jni::Local<jni::Object<Layer>> createJavaLayerPeer(jni::JNIEnv& env, std::unique_ptr<mbgl::style::Layer>) final;
+
+    void registerNative(jni::JNIEnv&) final;
+
+    LayerFactory* getLayerFactory() final { return this; }
+
+};  // class CustomJavaLayerPeerFactory
+
+} // namespace android
+} // namespace mbgl