Examples of org.luaj.vm2.LuaClosure

org.luaj.vm2.LuaTable
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

    if ( di == null )
      return NIL;


    // start a table
    LuaTable info = new LuaTable();
    LuaClosure c = di.closure;
    for (int i = 0, j = what.length(); i < j; i++) {
      switch (what.charAt(i)) {
        case 'S': {
          if ( c != null ) {
            Prototype p = c.p;

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  static Varargs _getupvalue(Varargs args) {
    LuaValue func = args.checkfunction(1);
    int up = args.checkint(2);
    if ( func instanceof LuaClosure ) {
      LuaClosure c = (LuaClosure) func;
      LuaString name = findupvalue(c, up);
      if ( name != null ) {
        return varargsOf(name, c.upValues[up-1].getValue() );
      }
    }

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  static LuaValue _setupvalue(Varargs args) {
    LuaValue func = args.checkfunction(1);
    int up = args.checkint(2);
    LuaValue value = args.arg(3);
    if ( func instanceof LuaClosure ) {
      LuaClosure c = (LuaClosure) func;
      LuaString name = findupvalue(c, up);
      if ( name != null ) {
        c.upValues[up-1].setValue(value);
        return name;
      }

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    if (loadedTable.get(packageName).toboolean()) {
      return;
    }
    
    Prototype prototype = LuaCache.loadPackage(packageName, system);
    LuaClosure function = new LuaClosure(prototype, globals);
    function.invoke();
    
    loadedTable.set(packageName, LuaValue.TRUE);
  }

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                    defaultAnimationName = animationName; // set first animation as the default one
                }
            }
            catch (SpriteException ex) {
                // Error in the input file.
                throw new LuaError(ex);
            }
            catch (Exception ex) {
                // Error in the editor.
                ex.printStackTrace();
                throw new LuaError(ex);
            }


            return LuaValue.NIL;
        }

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            LuaC.install();
            LuaTable environment = LuaValue.tableOf();


            environment.set("animation", new AnimationFunction());


            LuaFunction code = LoadState.load(new FileInputStream(spriteFile),
                spriteFile.getName(), environment);
            code.call();
        }
        catch (IOException ex) {
            throw new SpriteException(ex.getMessage());
        }
        catch (LuaError ex) {

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                    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";

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        try {
            this.animations = new TreeMap<String, SpriteAnimation>();
            File spriteFile = Project.getSpriteFile(animationSetId);
            LuaC.install();
            LuaTable environment = LuaValue.tableOf();


            environment.set("animation", new AnimationFunction());


            LuaFunction code = LoadState.load(new FileInputStream(spriteFile),
                spriteFile.getName(), environment);
            code.call();
        }

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        @Override
        public LuaValue call(LuaValue arg) {


            try {
                LuaTable table = arg.checktable();


                String animationName = table.get("name").checkjstring();
                String srcImageName = table.get("src_image").checkjstring();
                int frameDelay = table.get("frame_delay").optint(0);
                int frameToLoopOn = table.get("frame_to_loop_on").optint(-1);
                LuaTable directionsTable = table.get("directions").checktable();


                BufferedImage srcImage = null;


                try {
                    if (!srcImageName.equals("tileset")) {
                        srcImage = Project.getProjectImage("sprites/" + srcImageName);
                    }
                    else if (!tilesetId.isEmpty()) {
                        srcImage = Project.getProjectImage(
                                "tilesets/" + Project.getTilesetEntitiesImageFile(tilesetId).getName());
                    }
                } catch (IOException ex) {
                    // image cannot be loaded
                }


                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);

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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);

View Full Code Here

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