Examples of org.luaj.vm2.LuaString

org.luaj.vm2.LuaString
Subclass of {@link LuaValue} for representing lua strings.
Because lua string values are more nearly sequences of bytes than sequences of characters or unicode code points, the {@link LuaString}implementation holds the string value in an internal byte array.
{@link LuaString} values are generally not mutable once constructed, so multiple {@link LuaString} values can chare a single byte array.
Currently {@link LuaString}s are pooled via a centrally managed weak table. To ensure that as many string values as possible take advantage of this, Constructors are not exposed directly. As with number, booleans, and nil, instance construction should be via {@link LuaValue#valueOf(byte[])} or similar API.
When Java Strings are used to initialize {@link LuaString} data, the UTF8 encoding is assumed. The functions {@link LuaString#lengthAsUtf8(char[]),}{ {@link LuaString#encodeToUtf8(char[],byte[],int)}, and {@link LuaString#decodeAsUtf8(byte[],int,int) are used to convert back and forth between UTF8 byte arrays and character arrays.} @see LuaValue @see LuaValue#valueOf(String) @see LuaValue#valueOf(byte[])


import java.io.IOException;


public class ModuleExecutor {
    public String run(IWikiModel model, String module, String method, Frame frame) throws IOException {
        final Globals globals = getGlobals();
        MwCommon common = new MwCommon(model, globals);
        return common.execute(module, method, frame);
    }

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        MwCommon common = new MwCommon(model, globals);
        return common.execute(module, method, frame);
    }


    private Globals getGlobals() {
        final Globals globals = JsePlatform.standardGlobals();
//        LuaJC.install(globals);
        return globals;
    }

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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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    assertEquals( LuaString.class, v.getClass() );
    assertEquals( "777", v.toString() );
  }


  public void testLuaStringToJavaString() {
    LuaString s = LuaValue.valueOf("777");
    Object o = CoerceLuaToJava.coerce(s, String.class);
    assertEquals( String.class, o.getClass() );
    assertEquals( "777", o );
  }

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  private String createLuaStringField(LuaString value) {
    String name = PREFIX_CONSTANT+constants.size();
    FieldGen fg = new FieldGen(Constants.ACC_STATIC | Constants.ACC_FINAL, 
        TYPE_LUAVALUE, name, cp);
    cg.addField(fg.getField());
    LuaString ls = value.checkstring();
    if ( ls.isValidUtf8() ) {
      init.append(new PUSH(cp, value.tojstring()));
      init.append(factory.createInvoke(STR_LUASTRING, "valueOf",
          TYPE_LUASTRING, ARG_TYPES_STRING, Constants.INVOKESTATIC));
    } else {
      char[] c = new char[ls.m_length];

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    return funcstate.f;
  }


  // look up and keep at most one copy of each string
  public LuaString newTString(byte[] bytes, int offset, int len) {
    LuaString tmp = LuaString.valueOf(bytes, offset, len);
    LuaString v = (LuaString) strings.get(tmp);
    if ( v == null ) {
      // must copy bytes, since bytes could be from reusable buffer
      byte[] copy = new byte[len];
      System.arraycopy(bytes, offset, copy, 0, len);
      v = LuaString.valueOf(copy);

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  private Varargs ioread(File f, Varargs args) throws IOException {
    int i,n=args.narg();
    LuaValue[] v = new LuaValue[n];
    LuaValue ai,vi;
    LuaString fmt;
    for ( i=0; i<n; ) {
      item: switch ( (ai = args.arg(i+1)).type() ) {
        case LuaValue.TNUMBER:
          vi = freadbytes(f,ai.toint());
          break item;

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  public void testStringAndIntegerKeys() {
    LuaTable t = new_Table();
    
    for ( int i = 0; i < 10; ++i ) {
      LuaString str = LuaString.valueOf( String.valueOf( i ) );
      t.set( i, str );
      t.set( str, LuaInteger.valueOf( i ) );
    }
    
    assertTrue( t.getArrayLength() >= 9 ); // 1, 2, ..., 9

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