[android] Sources: peer model, mutability (#6054)

platform/android/src/style/sources/source.cpp

@@ -0,0 +1,72 @@
+#include "source.hpp"
+#include "../android_conversion.hpp"
+
+#include <jni/jni.hpp>
+
+#include <mbgl/platform/log.hpp>
+
+//Java -> C++ conversion
+#include <mbgl/style/conversion.hpp>
+#include <mbgl/style/conversion/source.hpp>
+
+//C++ -> Java conversion
+#include "../conversion/property_value.hpp"
+
+#include <string>
+
+namespace mbgl {
+namespace android {
+
+    /**
+     * Invoked when the construction is initiated from the jvm through a subclass
+     */
+    Source::Source(jni::JNIEnv&, std::unique_ptr<mbgl::style::Source> coreSource)
+        : ownedSource(std::move(coreSource))
+        , source(*ownedSource) {
+    }
+
+    Source::Source(mbgl::Map& coreMap, mbgl::style::Source& coreSource) : source(coreSource) , map(&coreMap) {
+    }
+
+    Source::~Source() {
+    }
+
+    jni::String Source::getId(jni::JNIEnv& env) {
+        return jni::Make<jni::String>(env, source.getID());
+    }
+
+    void Source::updateStyle(jni::jboolean updateClasses) {
+        //Update the style only if attached
+        if (ownedSource == nullptr) {
+            Update flags = mbgl::Update::RecalculateStyle;
+            if(updateClasses) {
+                flags = flags | mbgl::Update::Classes;
+            }
+            map->update(flags);
+        } else {
+            mbgl::Log::Debug(mbgl::Event::JNI, "Not updating as source is not attached to map (yet)");
+        }
+    }
+
+    std::unique_ptr<mbgl::style::Source> Source::releaseCoreSource() {
+        assert(ownedSource != nullptr);
+        return std::move(ownedSource);
+    }
+
+    jni::Class<Source> Source::javaClass;
+
+    void Source::registerNative(jni::JNIEnv& env) {
+        //Lookup the class
+        Source::javaClass = *jni::Class<Source>::Find(env).NewGlobalRef(env).release();
+
+        #define METHOD(MethodPtr, name) jni::MakeNativePeerMethod<decltype(MethodPtr), (MethodPtr)>(name)
+
+        //Register the peer
+        jni::RegisterNativePeer<Source>(env, Source::javaClass, "nativePtr",
+            METHOD(&Source::getId, "nativeGetId")
+        );
+
+    }
+
+} //android
+} //mbgl