List of invokeExact() Examples

Examples of invokeExact()

java.lang.invoke.MethodHandle.invokeExact()
Invokes the method handle, allowing any caller type descriptor, but requiring an exact type match. The symbolic type descriptor at the call site of {@code invokeExact} mustexactly match this method handle's {@link #type type}. No conversions are allowed on arguments or return values.
When this method is observed via the Core Reflection API, it will appear as a single native method, taking an object array and returning an object. If this native method is invoked directly via {@link java.lang.reflect.Method#invoke java.lang.reflect.Method.invoke}, via JNI, or indirectly via {@link java.lang.invoke.MethodHandles.Lookup#unreflect Lookup.unreflect}, it will throw an {@code UnsupportedOperationException}. @param args the signature-polymorphic parameter list, statically represented using varargs @return the signature-polymorphic result, statically represented using {@code Object} @throws WrongMethodTypeException if the target's type is not identical with the caller's symbolic type descriptor @throws Throwable anything thrown by the underlying method propagates unchanged through the method handle call

Examples of java.lang.invoke.MethodHandle.invokeExact()

  public static void timeUnReflectionCached(IndyDemo indyDemo) throws Throwable {
    long start = System.currentTimeMillis();
    MethodHandles.Lookup lookup = MethodHandles.lookup();
    MethodHandle someMethod = lookup.unreflect(IndyDemo.class.getDeclaredMethod("someMethod"));
    for (int i = 0; i < TIMES; i++) {
      int result = (int) someMethod.invokeExact(indyDemo);
    }
    System.out.println("unreflection cached: " + (System.currentTimeMillis() - start));
  }


  public static void timeMH(IndyDemo indyDemo) throws Throwable {

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Examples of java.lang.invoke.MethodHandle.invokeExact()

    long start = System.currentTimeMillis();
    MethodHandles.Lookup lookup = MethodHandles.lookup();
    MethodType type = MethodType.methodType(Integer.TYPE);
    MethodHandle someMethod = lookup.findVirtual(IndyDemo.class, "someMethod", type);
    for (int i = 0; i < TIMES; i++) {
      int result = (int) someMethod.invokeExact(indyDemo);
    }
    System.out.println("methodhandle cached: " + (System.currentTimeMillis() - start));
  }


  public static void timeDirect(IndyDemo indyDemo) throws Throwable {

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Examples of java.lang.invoke.MethodHandle.invokeExact()

    final MethodHandle constr = findAttributeImplCtor(clazz);
    return new StaticImplementationAttributeFactory<A>(delegate, clazz) {
      @Override
      protected A createInstance() {
        try {
          return (A) constr.invokeExact();
        } catch (Throwable t) {
          rethrow(t);
          throw new AssertionError();
        }
      }

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Examples of java.lang.invoke.MethodHandle.invokeExact()

        final Delegate delegate = outer.compileDelegate();
        final MethodHandle handle = delegate.getMethodHandle();


        System.out.printf("\n[%s]\n", handle.getClass().getSimpleName());


        final int result = (int) handle.invokeExact();


        System.out.println(result);


        assertEquals(expectedResult, result);
    }

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Examples of java.lang.invoke.MethodHandle.invokeExact()

        final MethodHandle getter = MethodHandles.lookup().findStaticGetter(
            generatedType.getErasedClass(),
            "Numbers",
            int[].class);


        final int[] numbers = (int[])getter.invokeExact();


        assertArrayEquals(new int[] { 1, 2, 3, 4, 5 }, numbers);
    }
    
    @Test

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Examples of java.lang.invoke.MethodHandle.invokeExact()

  @Test
  public void test_golo_loading() throws Throwable {
    CodeLoader loader = new CodeLoader();


    MethodHandle truth = loader.golo("check", "truth", 0);
    assertEquals(42, (Object) truth.invokeExact());


    MethodHandle incr = loader.golo("check", "incr", 1);
    assertEquals(42, (Object) incr.invokeExact((Object) 41));
  }

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Examples of java.lang.invoke.MethodHandle.invokeExact()


    MethodHandle truth = loader.golo("check", "truth", 0);
    assertEquals(42, (Object) truth.invokeExact());


    MethodHandle incr = loader.golo("check", "incr", 1);
    assertEquals(42, (Object) incr.invokeExact((Object) 41));
  }


  @Test
  public void test_groovy_loading() throws Throwable {
    CodeLoader loader = new CodeLoader();

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Examples of java.lang.invoke.MethodHandle.invokeExact()

  @Test
  public void test_groovy_loading() throws Throwable {
    CodeLoader loader = new CodeLoader();


    MethodHandle truth = loader.groovy("Check", "truth", genericMethodType(0));
    assertEquals(42, (Object) truth.invokeExact());


    MethodHandle incr = loader.groovy("Check", "incr", genericMethodType(1));
    assertEquals(42, (Object) incr.invokeExact((Object) 41));
  }

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Examples of java.lang.invoke.MethodHandle.invokeExact()


    MethodHandle truth = loader.groovy("Check", "truth", genericMethodType(0));
    assertEquals(42, (Object) truth.invokeExact());


    MethodHandle incr = loader.groovy("Check", "incr", genericMethodType(1));
    assertEquals(42, (Object) incr.invokeExact((Object) 41));
  }


  @Test
  public void test_groovy_indy_loading() throws Throwable {
    CodeLoader loader = new CodeLoader();

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Examples of java.lang.invoke.MethodHandle.invokeExact()

  @Test
  public void test_groovy_indy_loading() throws Throwable {
    CodeLoader loader = new CodeLoader();


    MethodHandle truth = loader.groovy_indy("Check", "truth", genericMethodType(0));
    assertEquals(42, (Object) truth.invokeExact());


    MethodHandle incr = loader.groovy_indy("Check", "incr", genericMethodType(1));
    assertEquals(42, (Object) incr.invokeExact((Object) 41));
  }

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