Loading java library functions to Luaj

Question

I am stuck with loading java functions so that it can be called from lua file using luaj. What i currently do is create something like this : in some_package/aif.java : ``` package some_package; public class aif extends TwoArgFunction { public aif() { } @Override public LuaValue call(LuaValue modname, LuaValue env) { LuaValue library = tableOf(); library.set("foo", new foo()); env.set("aif", library); return library; } //the rest contains the implementations of java functions } ``` and then in lua file : ``` require "some_package/aif" --etc ... ``` and then in Main.java file : ``` public static void Main(String[] args) { String script = "lib/some_lua_file.lua"; globals = JsePlatform.standardGlobals(); LuaValue chunk = globals.loadFile(script); chunk.call( LuaValue.valueOf(script) ); } ``` this code works , but what i want is that in lua file we dont have to use "require". I have achieved this similarly but in c++ using this line : ``` luaL_requiref(L, "aif", luaopen_aiflib, 1); ``` ca…

Accepted Answer

I have found the answer after looking at the luaj implementation of Lua library.

i modified my code :

```
package some_package;

public class aif extends OneArgFunction{

public aif() {
    }

@Override
    public LuaValue call(LuaValue env) {
        Globals globals = env.checkglobals();
        LuaTable aif = new LuaTable();
        aif.set("foo", new foo());
        env.set("aif", aif);
        globals.package_.loaded.set("aif", aif);
        return aif;
    }

//the rest contains the implementations of java functions
}
```

I code the aif class to TwoArgFunction is because the tutorial said to do so. Now with the above code, no need to require the class in lua file

Loading java library functions to Luaj

Solution

Problem