Creating classes that handle the jobject/class conversions.

app/src/main/cpp/CMakeLists.txt

@@ -35,6 +35,7 @@ set (HEADERS
         types/RepeatTypes.h
         types/ShuffleTypes.h
         utility/GeneralUtility.h
+        utility/JNIObjectConversion.h
 )
 
 set(JSON_BuildTests OFF CACHE INTERNAL "")

app/src/main/cpp/model/Token.h

@@ -14,8 +14,7 @@ namespace model {
     public:
         Token() = default;
         Token(const std::string& accessToken) : accessToken(accessToken) { }
-        Token(const std::string&& accessToken) :
-            accessToken(accessToken) { }
+        Token(const std::string&& accessToken) : accessToken(accessToken) { }
 
         std::string accessToken;
     };

app/src/main/cpp/utility/JNIObjectConversion.h

@@ -0,0 +1,49 @@
+//
+// Created by brahmix on 1/13/20.
+//
+
+#ifndef MEAR_JNIOBJECTCONVERSION_H
+#define MEAR_JNIOBJECTCONVERSION_H
+
+#include <string>
+#include <algorithm>
+#include <memory>
+
+#include "../model/Token.h"
+#include "../model/User.h"
+
+namespace utility {
+    template<typename Obj>
+    class JNIObjectConversion {
+    public:
+        // jobject to classes
+        template<typename Token, typename JE>
+        static Token ObjToToken(JE *env, Obj tokenObj) {
+            auto tokenClass = env->GetObjectClass(tokenObj);
+
+            auto accessTokenId = env->GetFieldId(tokenClass, "accessToken", "Ljava/lang/String;");
+
+            auto accessTokenVal = env->GetObjectField(tokenObj, accessTokenId);
+
+            Token token(std::move(env->GetStringUTFChars(accessTokenVal, nullptr)));
+
+            return token;
+        }
+
+
+        // classes to jobject
+        template<typename Token, typename JE>
+        static Obj TokenToObj(JE *env, const Token& token) {
+            auto tokenClass = env->FindClass("com/example/mear/models/Token");
+            auto tokenConstructor = env->GetMethodID(tokenClass, "<init>", "()V");
+            auto tokenObj = env->NewObject(tokenClass, tokenConstructor);
+
+            auto accessTokenId = env->GetFieldID(tokenClass, "accessToken", "Ljava/lang/String;");
+
+            // TODO: left off here
+        }
+    private:
+    };
+}
+
+#endif //MEAR_JNIOBJECTCONVERSION_H