Examples of LuaValue

org.luaj.vm2.LuaValue
Base class for all concrete lua type values.
Establishes base implementations for all the operations on lua types. This allows Java clients to deal essentially with one type for all Java values, namely {@link LuaValue}.
Constructors are provided as static methods for common Java types, such as {@link LuaValue#valueOf(int)} or {@link LuaValue#valueOf(String)} to allow for instance pooling.
Constants are defined for the lua values {@link #NIL}, {@link #TRUE}, and {@link #FALSE}. A constant {@link #NONE} is defined which is a {@link Varargs} list having no values.
Operations are performed on values directly via their Java methods. For example, the following code divides two numbers:
```
  {@code LuaValue a = LuaValue.valueOf( 5 ); LuaValue b = LuaValue.valueOf( 4 ); LuaValue c = a.div(b);} 
```
Note that in this example, c will be a {@link LuaDouble}, but would be a {@link LuaInteger} if the value of a were changed to 8, say. In general the value of c in practice will vary depending on both the types and values of a and b as well as any metatable/metatag processing that occurs.
Field access and function calls are similar, with common overloads to simplify Java usage:
```
  {@code LuaValue globals = JsePlatform.standardGlobals(); LuaValue sqrt = globals.get("math").get("sqrt"); LuaValue print = globals.get("print"); LuaValue d = sqrt.call( a ); print.call( LuaValue.valueOf("sqrt(5):"), a );} 
```
To supply variable arguments or get multiple return values, use {@link invoke(Varargs)} or {@link invokemethod(LuaValue, Varargs)} methods:
```
  {@code LuaValue modf = globals.get("math").get("modf"); Varargs r = modf.invoke( d ); print.call( r.arg(1), r.arg(2) );} 
```
To load and run a script, {@link LoadState} is used:
```
  {@code LoadState.load( new FileInputStream("main.lua"), "main.lua", globals ).call();} 
```
although {@code require} could also be used:
```
  {@code globals.get("require").call(LuaValue.valueOf("main"));} 
```
For this to work the file must be in the current directory, or in the class path, dependening on the platform. See {@link JsePlatform} and {@link JmePlatform} for details.
In general a {@link LuaError} may be thrown on any operation when the types supplied to any operation are illegal from a lua perspective. Examples could be attempting to concatenate a NIL value, or attempting arithmetic on values that are not number.
There are several methods for preinitializing tables, such as:
- {@link #listOf(LuaValue[])} for unnamed elements
- {@link #tableOf(LuaValue[])} for named elements
- {@link #tableOf(LuaValue[],LuaValue[],Varargs)} for mixtures
Predefined constants exist for the standard lua type constants {@link TNIL}, {@link TBOOLEAN}, {@link TLIGHTUSERDATA}, {@link TNUMBER}, {@link TSTRING}, {@link TTABLE}, {@link TFUNCTION}, {@link TUSERDATA}, {@link TTHREAD}, and extended lua type constants {@link TINT}, {@link TNONE}, {@link TVALUE}
Predefined constants exist for all strings used as metatags: {@link INDEX}, {@link NEWINDEX}, {@link CALL}, {@link MODE}, {@link METATABLE}, {@link ADD}, {@link SUB}, {@link DIV}, {@link MUL}, {@link POW}, {@link MOD}, {@link UNM}, {@link LEN}, {@link EQ}, {@link LT}, {@link LE}, {@link TOSTRING}, and {@link CONCAT}. @see JsePlatform @see JmePlatform @see LoadState @see Varargs

Examples of org.luaj.vm2.LuaValue

    
    final static String LUADIR = "lua";
    
    public static boolean init () {
    String script = LUADIR + "\\sv_init.lua";
        LuaValue _G = JsePlatform.standardGlobals();
        try {
            _G.get("dofile").call(LuaValue.valueOf(script));
            
        } catch (org.luaj.vm2.LuaError ex) {
            Main.ui.commitln("Error: " + ex.getMessage());
            Main.ui.commitln(sutil.ADVICE.REINSTALL.s());
            return true;

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Examples of org.luaj.vm2.LuaValue

                }


                Vector<SpriteAnimationDirection> directions = new Vector<SpriteAnimationDirection>();


                // Traverse the directions table.
                LuaValue key = LuaValue.NIL;
                while (true) {


                    Varargs keyValue = directionsTable.next(key);
                    key = keyValue.arg1();
                    if (key.isnil()) {
                        break;
                    }
                    LuaValue directionTable = keyValue.arg(2);


                    int x = directionTable.get("x").checkint();
                    int y = directionTable.get("y").checkint();
                    int frameWidth = directionTable.get("frame_width").checkint();
                    int frameHeight = directionTable.get("frame_height").checkint();
                    int originX = directionTable.get("origin_x").optint(0);
                    int originY = directionTable.get("origin_y").optint(0);
                    int numFrames = directionTable.get("num_frames").optint(1);
                    int numColumns = directionTable.get("num_columns").optint(numFrames);


                    Rectangle firstFrameRectangle = new Rectangle(x, y, frameWidth, frameHeight);


                    try {
                      SpriteAnimationDirection direction =  new SpriteAnimationDirection(

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Examples of org.luaj.vm2.LuaValue

        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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Examples of org.luaj.vm2.LuaValue

        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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Examples of org.luaj.vm2.LuaValue

    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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Examples of org.luaj.vm2.LuaValue

        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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Examples of org.luaj.vm2.LuaValue

        });
    }


    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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Examples of org.luaj.vm2.LuaValue

    }


    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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Examples of org.luaj.vm2.LuaValue

            }
        });
        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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Examples of org.luaj.vm2.LuaValue

            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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