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

        }
    }


    @Override
    public LuaTable getInterface() {
        final LuaTable table = new LuaTable();
        table.set("loadPackage", loadPackage());
        table.set("frameExists", frameExists());
        table.set("newChildFrame", newChildFrame());
        table.set("getExpandedArgument", getExpandedArgument());
        table.set("getAllExpandedArguments", getAllExpandedArguments());
        table.set("getFrameTitle", getFrameTitle());
        table.set("expandTemplate", expandTemplate());
        table.set("callParserFunction", callParserFunction());
        table.set("preprocess", preprocess());
        table.set("incrementExpensiveFunctionCount", incrementExpensiveFunctionCount());
        table.set("isSubsting", isSubsting());
        return table;
    }

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        throw new FileNotFoundException("could not find module " + moduleName);
    }


    @Override
    public LuaValue getSetupOptions() {
        return new LuaTable();
    }

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        });
    }


    private static class unpack extends VarArgFunction {
        public Varargs invoke(Varargs args) {
            LuaTable t = args.checktable(1);
            switch (args.narg()) {
                case 1: return t.unpack();
                case 2: return t.unpack(args.checkint(2));
                default: return t.unpack(args.checkint(2), args.checkint(3));
            }
        }

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        return "mw.language";
    }


    @Override
    public LuaTable getInterface() {
        LuaTable table = new LuaTable();
        table.set("isSupportedLanguage", defaultFunction());
        table.set("isKnownLanguageTag", defaultFunction());
        table.set("isValidCode", defaultFunction());
        table.set("isValidBuiltInCode", defaultFunction());
        table.set("fetchLanguageName", fetchLanguageName());
        table.set("fetchLanguageNames", fetchLanguageNames());
        table.set("getFallbacksFor", defaultFunction());
        table.set("getContLangCode", getContLangCode());
        table.set("lc", lc());
        table.set("uc", uc());
        /*
        // TODO
        lcfirst
        ucfirst
        caseFold

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             *                   'mw' only if the language is defined in MediaWiki or wgExtraLanguageNames (default)
             *                   'mwfile' only if the language is in 'mw' *and* has a message file
             * @return array: language code => language name
             */
            @Override public LuaValue call(LuaValue inLanguage, LuaValue include) {
                return new LuaTable();
            }
        };
    }

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        return "mw.text";
    }


    @Override
    public LuaTable getInterface() {
        LuaTable table = new LuaTable();


        table.set("unstrip", unstrip());
        table.set("getEntityTable", getEntityTable());
        return table;
    }

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        };
    }


    @Override
    public LuaValue getSetupOptions() {
        LuaTable table = new LuaTable();
        table.set("nowiki_protocols", new LuaTable());
        table.set("comma", ", ");
        table.set("and", " and ");
        table.set("ellipsis", "...");
        return table;
    }

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        return "mw.message";
    }


    @Override
    public LuaTable getInterface() {
        LuaTable iface = new LuaTable();
        iface.set("plain", messagePlain());
        iface.set("check", messageCheck());
        return iface;
    }

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        };
    }


    @Override
    public LuaValue getSetupOptions() {
        LuaTable options = new LuaTable();


        options.set("lang", "en");
        return options;
    }

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        final LuaString rawMessage;


        Message(LuaValue data) {
            useDB  = data.get("useDB").optboolean(false);
            lang   = data.get("lang").optjstring("en");
            keys   = data.get("keys").opttable(new LuaTable());
            params = data.get("params").opttable(new LuaTable());
            rawMessage = data.get("rawMessage").checkstring();
        }

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