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

    assertEquals( B.class, b0.getClass() );
    assertEquals( 0, ((B)b0).m_int_field );
  }
  public void testUniqueFactoryUncoercible() {
    JavaClass f = JavaClass.forClass(B.class);
    LuaValue constr = f.get("new");
    assertEquals( JavaConstructor.class, constr.getClass() );
    try { 
      LuaValue v = constr.call(LuaValue.userdataOf(new Object()));
      Object b = v.touserdata();
      // fail( "did not throw lua error as expected" );
      assertEquals( 0, ((B)b).m_int_field );
    } catch ( LuaError e ) {
    }
  }

View Full Code Here

Examples of org.luaj.vm2.LuaValue

    } catch ( LuaError e ) {
    }
  }
  public void testOverloadedFactoryCoercible() {
    JavaClass f = JavaClass.forClass(C.class);
    LuaValue constr = f.get("new");
    assertEquals( JavaConstructor.Overload.class, constr.getClass() );
    Object c = constr.call().touserdata();
    Object ci = constr.call(LuaValue.valueOf(123)).touserdata();
    Object cs = constr.call(LuaValue.valueOf("abc")).touserdata();
    Object csi = constr.call( LuaValue.valueOf("def"), LuaValue.valueOf(456) ).touserdata();
    assertEquals( C.class, c.getClass() );
    assertEquals( C.class, ci.getClass() );
    assertEquals( C.class, cs.getClass() );
    assertEquals( C.class, csi.getClass() );
    assertEquals( null,  ((C)c).m_string_field );

View Full Code Here

Examples of org.luaj.vm2.LuaValue

    }
  }
  
  public void testNoAttribute() {
    JavaClass f = JavaClass.forClass(A.class);
    LuaValue v = f.get("bogus");
    assertEquals( v, LuaValue.NIL );
    try { 
      f.set("bogus",ONE);      
      fail( "did not throw lua error as expected" );
    } catch ( LuaError e ) {}

View Full Code Here

Examples of org.luaj.vm2.LuaValue

    i.set("m_int_field", THREE );  assertEquals( 3, i.get("m_int_field").toint() );
  }
  public void testUniqueMethodAttributeCoercible() {
    B b = new B();
    JavaInstance ib = new JavaInstance(b);
    LuaValue b_getString = ib.get("getString");
    LuaValue b_getint = ib.get("getint");
    assertEquals( JavaMethod.class, b_getString.getClass() );
    assertEquals( JavaMethod.class, b_getint.getClass() );
    assertEquals( "abc", b_getString.call(SOMEB).tojstring() );
    assertEquals( 100000, b_getint.call(SOMEB).toint());
    assertEquals( "abc", b_getString.call(SOMEC).tojstring() );
    assertEquals( 200000, b_getint.call(SOMEC).toint());
  }

View Full Code Here

Examples of org.luaj.vm2.LuaValue

    assertEquals( 200000, b_getint.call(SOMEC).toint());
  }
  public void testUniqueMethodAttributeArgsCoercible() {
    B b = new B();
    JavaInstance ib = new JavaInstance(b);
    LuaValue uniq = ib.get("uniq");
    LuaValue uniqs = ib.get("uniqs");
    LuaValue uniqi = ib.get("uniqi");
    LuaValue uniqsi = ib.get("uniqsi");
    LuaValue uniqis = ib.get("uniqis");
    assertEquals( JavaMethod.class, uniq.getClass() );
    assertEquals( JavaMethod.class, uniqs.getClass() );
    assertEquals( JavaMethod.class, uniqi.getClass() );
    assertEquals( JavaMethod.class, uniqsi.getClass() );
    assertEquals( JavaMethod.class, uniqis.getClass() );
    assertEquals( "uniq()",                   uniq.call(SOMEB).tojstring() );
    assertEquals( "uniqs(string:abc)",        uniqs.call(SOMEB,ABC).tojstring() );
    assertEquals( "uniqi(int:1)",             uniqi.call(SOMEB,ONE).tojstring() );
    assertEquals( "uniqsi(string:abc,int:1)", uniqsi.call(SOMEB,ABC,ONE).tojstring() );
    assertEquals( "uniqis(int:1,string:abc)", uniqis.call(SOMEB,ONE,ABC).tojstring() );
    assertEquals( "uniqis(int:1,string:abc)", uniqis.invoke(LuaValue.varargsOf(new LuaValue[] {SOMEB,ONE,ABC,ONE})).arg1().tojstring() );
  }

View Full Code Here

Examples of org.luaj.vm2.LuaValue

            InputStream is = new ByteArrayInputStream(script.getBytes());
            Prototype p = LuaC.instance.compile(is, "script");
            
            // double check script result before dumping
            LuaFunction f = new LuaClosure(p, _G);
            LuaValue r = f.call();
            String actual = r.tojstring();
            assertEquals( expectedPriorDump, actual );
            
            // dump into bytes
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            try {
                DumpState.dump(p, baos, stripDebug, numberFormat, littleEndian);
              if ( ! shouldPass )
                fail( "dump should not have succeeded" );
            } catch ( Exception e ) {
              if ( shouldPass )
                fail( "dump threw "+e );
              else
                return;
            }
            byte[] dumped = baos.toByteArray();
            
            // load again using compiler
            is = new ByteArrayInputStream(dumped);
            f = LoadState.load(is, "dumped", _G);
            r = f.call();
            actual = r.tojstring();
            assertEquals( expectedPostDump, actual );


            // write test chunk
            if ( System.getProperty(SAVECHUNKS) != null && script.equals(mixedscript) ) {
              new File("build").mkdirs();

View Full Code Here

Examples of org.luaj.vm2.LuaValue

    assertEquals( "uniqis(int:1,string:abc)", uniqis.invoke(LuaValue.varargsOf(new LuaValue[] {SOMEB,ONE,ABC,ONE})).arg1().tojstring() );
  }
  public void testOverloadedMethodAttributeCoercible() {
    B b = new B();
    JavaInstance ib = new JavaInstance(b);
    LuaValue p = ib.get("pick");
    assertEquals( "pick()",           p.call(SOMEB).tojstring() );
    assertEquals( "pick(string:abc)", p.call(SOMEB,ABC).tojstring() );
    assertEquals( "pick(int:1)",      p.call(SOMEB,ONE).tojstring() );
    assertEquals( "pick(string:abc,int:1)", p.call(SOMEB,ABC,ONE).tojstring() );
    assertEquals( "pick(int:1,string:abc)", p.call(SOMEB,ONE,ABC).tojstring() );
    assertEquals( "pick(int:1,string:abc)", p.invoke(LuaValue.varargsOf(new LuaValue[] {SOMEB,ONE,ABC,ONE})).arg1().tojstring() );
  }

View Full Code Here

Examples of org.luaj.vm2.LuaValue

    assertEquals( "pick(int:1,string:abc)", p.invoke(LuaValue.varargsOf(new LuaValue[] {SOMEB,ONE,ABC,ONE})).arg1().tojstring() );
  }
  public void testUnboundOverloadedMethodAttributeCoercible() {
    B b = new B();
    JavaInstance ib = new JavaInstance(b);
    LuaValue p = ib.get("pick");
    assertEquals( JavaMethod.Overload.class, p.getClass() );
    assertEquals( "pick()",                   p.call(SOMEC).tojstring() );
    assertEquals( "class-c-pick(string:abc)", p.call(SOMEC,ABC).tojstring() );
    assertEquals( "class-c-pick(int:1)",      p.call(SOMEC,ONE).tojstring() );
    assertEquals( "pick(string:abc,int:1)",   p.call(SOMEC,ABC,ONE).tojstring() );
    assertEquals( "pick(int:1,string:abc)",   p.call(SOMEC,ONE,ABC).tojstring() );
    assertEquals( "pick(int:1,string:abc)",   p.invoke(LuaValue.varargsOf(new LuaValue[] {SOMEC,ONE,ABC,ONE})).arg1().tojstring() );
  }

View Full Code Here

Examples of org.luaj.vm2.LuaValue

    assertEquals( "pick(int:1,string:abc)",   p.invoke(LuaValue.varargsOf(new LuaValue[] {SOMEC,ONE,ABC,ONE})).arg1().tojstring() );
  }
  public void testOverloadedStaticMethodAttributeCoercible() {
    B b = new B();
    JavaInstance ib = new JavaInstance(b);
    LuaValue p = ib.get("staticpick");
    assertEquals( "static-pick()",           p.call(SOMEB).tojstring() );
    assertEquals( "static-pick(string:abc)", p.call(SOMEB,ABC).tojstring() );
    assertEquals( "static-pick(int:1)",      p.call(SOMEB,ONE).tojstring() );
    assertEquals( "static-pick(string:abc,int:1)", p.call(SOMEB,ABC,ONE).tojstring() );
    assertEquals( "static-pick(int:1,string:abc)", p.call(SOMEB,ONE,ABC).tojstring() );
    assertEquals( "static-pick(int:1,string:abc)", p.invoke(LuaValue.varargsOf(new LuaValue[] {SOMEB,ONE,ABC,ONE})).arg1().tojstring() );
  }

View Full Code Here

Examples of org.luaj.vm2.LuaValue

    // create an environment to run in
    LuaTable _G = JsePlatform.standardGlobals();
    
    // compile into a chunk, or load as a class
    InputStream is =  new ByteArrayInputStream( script.getBytes() );
    LuaValue chunk = LuaC.instance.load(is, "script",_G);
    chunk.call();
  }

View Full Code Here

0 1 2 3 4 5

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.