Make JNI Bindings in Rust

.cargo/config.toml

@@ -0,0 +1,2 @@
+[build]
+target-dir = "Binaries"

Bootstrap.ps1

@@ -4,9 +4,6 @@
 
 if ($IsWindows)
 {
-    echo "Generating Visual Studio project..."
-
-    & "./Vendor/Premake/Windows/premake5.exe" "vs2019"
 }
 
 # Mac
@@ -15,11 +12,6 @@ elseif ($IsMacOS)
 {
     sudo chmod +x ./gradlew
     sudo chmod +x ./Scripts/Package.ps1
-
-    echo "Generating XCode project..."
-
-    sudo chmod +x ./Vendor/Premake/Mac/premake5
-    & "./Vendor/Premake/Mac/premake5" "xcode4"
 }
 
 # Linux
@@ -28,9 +20,4 @@ elseif ($IsLinux)
 {
     sudo chmod +x ./gradlew
     sudo chmod +x ./Scripts/Package.ps1
-
-    echo "Generating GMake project..."
-
-    sudo chmod +x ./Vendor/Premake/Linux/premake5
-    & "./Vendor/Premake/Linux/premake5" "gmake2"
 }

Bootstrap.sh

@@ -7,17 +7,10 @@ sudo chmod +x ./Scripts/Package.ps1
 
 if [ "$(expr substr $(uname -s) 1 5)" = "Linux" ]
 then
-    echo "Generating GMake project..."
-
-    sudo chmod +x ./Vendor/Premake/Linux/premake5
-    ./Vendor/Premake/Linux/premake5 gmake2
 
 # Mac
 
 elif [ "$(uname)" = "Darwin" ]
 then
-    echo "Generating XCode project..."
 
-    sudo chmod +x ./Vendor/Premake/Mac/premake5
-    ./Vendor/Premake/Mac/premake5 xcode4
 fi

Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "TribuFu-jvm"
+version = "0.0.1"
+description = "Jvm bindings to TribuFu SDK"
+repository = "https://github.com/TribuFu/SDK"
+authors = ["TribuFu <contact@tribufu.com>"]
+license = "Apache-2.0"
+edition = "2018"
+publish = false
+
+[lib]
+name="TribuFu_jvm"
+crate-type = ["cdylib", "rlib"]
+path = "Source/lib.rs"
+
+[dependencies]
+TribuFu = { path = "../DevKit.Rs", package = "TribuFu" }
+jni = "0.19.0"

Native/Source/Library.c

@@ -1,12 +0,0 @@
-// Copyright (c) TribuFu. All Rights Reserved
-
-#include <jni.h>
-#include "TribuFu.h"
-#include "Library.h"
-
-JNIEXPORT jstring JNICALL Java_tribufu_TribuFu_Hello(JNIEnv *env, jobject obj, jstring str)
-{
-    char *result = Hello("C");
-
-    return result;
-}

Native/Source/Library.h

@@ -1,13 +0,0 @@
-// Copyright (c) TribuFu. All Rights Reserved
-
-#pragma once
-
-#include <jni.h>
-#include "TribuFu.h"
-
-/*
- * Class:     tribufu_TribuFu
- * Method:    Hello
- * Signature: (Ljava/lang/String;)Ljava/lang/String;
- */
-JNIEXPORT jstring JNICALL Java_tribufu_TribuFu_Hello(JNIEnv *, jobject, jstring);

Native/Source/TribuFu.java

@@ -1,15 +0,0 @@
-// Copyright (c) TribuFu. All Rights Reserved
-
-package tribufu;
-
-public class TribuFu {
-    /**
-     * A native method that is implemented by the 'TribuFu' native library.
-     */
-    public native String Hello(String input);
-
-    // Used to load the 'TribuFu' library on application startup.
-    static {
-        System.loadLibrary("TribuFu_jvm");
-    }
-}

Native/premake5.lua

@@ -1,64 +0,0 @@
-project "TribuFu_jvm"
-    location "."
-    kind "SharedLib"
-    language "C"
-
-    targetdir ("./Binaries/%{cfg.buildcfg}")
-    objdir ("./Intermediate/")
-
-    files
-    {
-        "./Source/**.h",
-        "./Source/**.c",
-    }
-
-    includedirs
-    {
-        "../Vendor/TribuFu",
-        "D:/Program Files/AdoptOpenJDK/jdk-11.0.10.9-hotspot/include",
-        "D:/Program Files/AdoptOpenJDK/jdk-11.0.10.9-hotspot/include/win32"
-    }
-
-    filter "system:windows"
-        staticruntime "Off"
-        systemversion "latest"
-
-        links
-        {
-            "TribuFu.lib"
-        }
-
-        libdirs
-        {
-            "../Vendor/TribuFu/Windows"
-        }
-
-    filter { "system:windows", "configurations:debug" }
-        runtime "Debug"
-        symbols "on"
-
-    filter  { "system:windows", "configurations:release" }
-        runtime "Release"
-        optimize "on"
-
-    filter "system:linux"
-        links
-        {
-            "TribuFu"
-        }
-
-        libdirs
-        {
-            "../Vendor/TribuFu/Linux"
-        }
-
-    filter "system:darwin"
-        links
-        {
-            "TribuFu"
-        }
-
-        libdirs
-        {
-            "../Vendor/TribuFu/Mac"
-        }

Scripts/Package.ps1

@@ -4,5 +4,11 @@
 ./gradlew jar
 
 New-Item -Path "./Release" -ItemType Directory -Force
+New-Item -Path "./Release/Windows" -ItemType Directory -Force
+New-Item -Path "./Release/Mac" -ItemType Directory -Force
+New-Item -Path "./Release/Linux" -ItemType Directory -Force
+New-Item -Path "./Release/Android" -ItemType Directory -Force
 
 Copy-Item -Path "./lib/build/libs/lib-0.0.1.jar" -Destination "./Release/TribuFu.jar" -Recurse -Force
+
+Copy-Item -Path "./Binaries/debug/TribuFu_jvm.dll" -Destination "./Release/Windows/TribuFu_jvm.dll" -Recurse -Force

Source/lib.rs

@@ -0,0 +1,41 @@
+// Copyright (c) TribuFu. All Rights Reserved
+
+//! Jvm bindings to TribuFu SDK.
+
+#![allow(non_snake_case)]
+#![allow(unused_variables)]
+#![allow(unused_imports)]
+
+#[cfg(not(any(
+    target_os = "windows",
+    target_os = "macos",
+    target_os = "linux",
+    target_os = "android",
+)))]
+compile_error!("INVALID_TARGET_PLATFORM");
+
+use jni::objects::{JClass, JString};
+use jni::sys::jstring;
+use jni::JNIEnv;
+use std::ffi::{CStr, CString};
+
+#[no_mangle]
+// This is the class that owns our static method. It's not going to be used,
+// but still must be present to match the expected signature of a static
+// native method.
+pub extern "system" fn Java_tribufu_TribuFu_Hello(
+    env: JNIEnv,
+    _: JClass,
+    j_input: JString,
+) -> jstring {
+    // First, we have to get the string out of Java. Check out the `strings`
+    // module for more info on how this works.
+    let input = CString::from(unsafe { CStr::from_ptr(env.get_string(j_input).unwrap().as_ptr()) });
+
+    // Then we have to create a new Java string to return. Again, more info
+    // in the `strings` module.
+    let res = env.new_string(input.to_str().unwrap()).unwrap();
+
+    // Finally, extract the raw pointer to return.
+    return res.into_inner();
+}

premake5.lua

@@ -1,10 +0,0 @@
-workspace "DevKit.Jvm"
-    architecture "x64"
-
-    configurations
-    {
-        "debug",
-        "release"
-    }
-
-    include "Native"