Examples of org.luaj.vm2.LuaClosure

org.luaj.vm2.Prototype
Extension of {@link LuaFunction} which executes lua bytecode.
A {@link LuaClosure} is a combination of a {@link Prototype} and a {@link LuaValue} to use as an environment for execution.
There are three main ways {@link LuaClosure} instances are created:
- Construct an instance using {@link #LuaClosure(Prototype,LuaValue)}
- Construct it indirectly by loading a chunk via {@link LuaCompiler#load(java.io.InputStream,String,LuaValue)}
- Execute the lua bytecode {@link Lua#OP_CLOSURE} as part of bytecode processing
To construct it directly, the {@link Prototype} is typically created via a compiler such as {@link LuaC}:
```
  {@code InputStream is = new ByteArrayInputStream("print('hello,world').getBytes()); Prototype p = LuaC.instance.compile(is, "script"); LuaValue _G = JsePlatform.standardGlobals() LuaClosure f = new LuaClosure(p, _G);}
```
To construct it indirectly, the {@link LuaC} compiler may be used, which implements the {@link LuaCompiler} interface:
```
  {@code LuaFunction f = LuaC.instance.load(is, "script", _G);}
```
Typically, a closure that has just been loaded needs to be initialized by executing it, and its return value can be saved if needed:
```
  {@code LuaValue r = f.call(); _G.set( "mypkg", r ) }
```
In the preceding, the loaded value is typed as {@link LuaFunction} to allow for the possibility of other compilers such as {@link LuaJC}producing {@link LuaFunction} directly without creating a {@link Prototype} or {@link LuaClosure}.
Since a {@link LuaClosure} is a {@link LuaFunction} which is a {@link LuaValue}, all the value operations can be used directly such as:
- {@link LuaValue#setfenv(LuaValue)}
- {@link LuaValue#call()}
- {@link LuaValue#call(LuaValue)}
- {@link LuaValue#invoke()}
- {@link LuaValue#invoke(Varargs)}
- {@link LuaValue#method(String)}
- {@link LuaValue#method(String,LuaValue)}
- {@link LuaValue#invokemethod(String)}
- {@link LuaValue#invokemethod(String,Varargs)}
- ...
@see LuaValue @see LuaFunction @see LuaValue#isclosure() @see LuaValue#checkclosure() @see LuaValue#optclosure(LuaClosure) @see LoadState @see LoadState#compiler

        params.put("b", "b_value");
        subject = new Frame(params, null);
    }


    @Test public void testGetAllArguments() {
        LuaValue arguments = subject.getAllArguments();
        assertThat(arguments.length()).isEqualTo(2);
        assertThat(arguments.get(1).toString()).isEqualTo("a_value");
        assertThat(arguments.get(2).toString()).isEqualTo("b_value");
    }

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        tests    = loadTests();
    }


    public void runTests(RunNotifier notifier)  {
        final int testCount        = tests.get("count").toint();
        final LuaValue provideFunc = tests.get("provide");
        final LuaValue runFunc     = tests.get("run");


        for (int i=1; i<testCount+1; i++) {
            final Varargs provideValue = provideFunc.invoke(valueOf(i));
            final LuaValue name = provideValue.arg(2);
            final String expected = provideValue.arg(3).checkjstring();


            Description testDescription = Description.createTestDescription(getClass(), name.toString());


            if (isIgnored(testDescription)) {
                notifier.fireTestIgnored(testDescription);
                continue;
            }

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    public String execute(String module, String method, Frame frame) throws IOException {
        String name = module;
        if (!name.startsWith(Importer.MODULE)) {
            name = Importer.MODULE + name;
        }
        LuaValue chunk = globals.load(findModule(module), name, "t", globals).call();
        LuaValue luaFunction = chunk.get(method);
        LuaValue executeFunction = globals.get("mw").get("executeFunction");


        if (luaFunction == null || luaFunction.isnil()) {
            throw new AssertionError("luaFunction is nil");
        }


        try {
            currentFrame = frame;
            return executeFunction.call(luaFunction).tojstring();
        } finally {
            currentFrame = null;
        }
    }

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        fakeWikiBase();
    }


    private void stubExecuteModule() {
        // don't need module isolation
        final LuaValue mw = globals.get("mw");
        mw.set("executeModule", new TwoArgFunction() {
            @Override public LuaValue call(LuaValue chunk, LuaValue isConsole) {
                return chunk.call();
            }
        });
    }

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        });
    }


    private void fakeWikiBase() {
        // fake http://www.mediawiki.org/wiki/Extension:Wikibase
        final LuaValue mw = globals.get("mw");
        final LuaTable wikibase = new LuaTable();
        wikibase.set("getEntity", new ZeroArgFunction() {
            @Override public LuaValue call() {
                return NIL;
            }
        });
        mw.set("wikibase", wikibase);
    }

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    }


    private void load(MwInterface luaInterface) throws IOException {
        // logger.debug("loading interface " + luaInterface);


        LuaValue pkg = globals.loadfile(luaInterface.name()+
                (luaInterface.name().endsWith(".lua") ? "" : ".lua")).call();


        LuaValue setupInterface = pkg.get("setupInterface");


        if (!setupInterface.isnil()) {
            globals.set("mw_interface", luaInterface.getInterface());
            setupInterface.call(luaInterface.getSetupOptions());
        }
    }

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            }
        });
        globals.set("unpack", new unpack());


        // math.log10 got removed in 5.2
        LuaValue math = globals.get("math");
        math.set("log10", new OneArgFunction() {
            @Override
            public LuaValue call(LuaValue luaValue) {
                return valueOf(Math.log10(luaValue.checkdouble()));
            }
        });


        // table.maxn got removed in 5.2
        LuaValue table = globals.get("table");
        table.set("maxn", new OneArgFunction() {
            @Override public LuaValue call(LuaValue arg) {
                // TODO: is this correct?
                return arg.checktable().len();
            }
        });

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            return LuaValue.valueOf(replace(msg, params));
        }


        private String replace(String msg, LuaTable params) {
            for (int i=1; i<params.length()+1; i++) {
                LuaValue param = params.get(i);
                String actualParam;
                if (param.istable()) {


                    if (!param.get("raw").isnil()) {
                        actualParam = param.get("raw").checkjstring();
                    } else if (!param.get("num").isnil()) {
                        if (param.get("num").isnumber()) {
                            LuaNumber number = param.get("num").checknumber();
                            NumberFormat nf = NumberFormat.getInstance(Locale.forLanguageTag(lang));
                            actualParam = nf.format(number.todouble());
                        } else {
                            actualParam = param.get("num").tojstring();
                        }
                    } else {
                        actualParam = "unknown";
                    }
                } else {
                    actualParam = param.checkjstring();
                }
                msg = msg.replace("$"+i, actualParam);
            }
            return msg;
        }

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         * @param $interwiki    string Interwiki code
         */
        return new LibFunction() {
            @Override
            public Varargs invoke(Varargs args) {
                LuaValue ns    = args.arg(1);
                LuaValue title = args.arg(2);
                LuaValue fragment = args.arg(3);
                LuaValue interwiki = args.arg(4);
                return title(ns, title, fragment, interwiki);
            }
        };
    }

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  public static final void putInstance(LuaInstance instance) {
    InstanceQueue.offer(instance);
  }
  
  public static final Prototype loadPackage(String packageName, boolean system) throws AerospikeException {
    Prototype prototype = Packages.get(packageName);
    
    if (prototype == null) {
      InputStream is = getInputStream(packageName, system);
      prototype = compile(packageName, is);
      Packages.put(packageName, prototype);

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