Package java.lang.invoke

Examples of java.lang.invoke.CallSite

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  }

  @Test
  public void check_bootstrap() throws Throwable {
    MethodHandle handle = lookup().findStatic(ClosureCallSupportTest.class, "objectToString", genericMethodType(1));
    CallSite callSite = ClosureCallSupport.bootstrap(lookup(), "closure", methodType(Object.class, MethodHandle.class, Object.class));

    MethodHandle invoker = callSite.dynamicInvoker();
    assertThat((String) invoker.invokeWithArguments(handle, 123), is("123"));
    assertThat((String) invoker.invokeWithArguments(handle, 123), is("123"));

    handle = lookup().findStatic(ClosureCallSupportTest.class, "objectToStringDecorated", genericMethodType(1));
    assertThat((String) invoker.invokeWithArguments(handle, 123), is("[123]"));
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  }

  @Test
  public void check_bootstrap_varargs() throws Throwable {
    MethodHandle handle = lookup().findStatic(ClosureCallSupportTest.class, "concat", genericMethodType(0, true));
    CallSite callSite = ClosureCallSupport.bootstrap(lookup(), "closure", methodType(Object.class, MethodHandle.class, Object.class, Object.class));
    MethodHandle invoker = callSite.dynamicInvoker();
    assertThat((String) invoker.invokeWithArguments(handle, 1, 2), is("12"));

    handle = lookup().findStatic(ClosureCallSupportTest.class, "concat", genericMethodType(0, true));
    callSite = ClosureCallSupport.bootstrap(lookup(), "closure", methodType(Object.class, MethodHandle.class, Object.class));
    invoker = callSite.dynamicInvoker();
    assertThat((String) invoker.invokeWithArguments(handle, 1), is("1"));

    handle = lookup().findStatic(ClosureCallSupportTest.class, "concat", genericMethodType(0, true));
    callSite = ClosureCallSupport.bootstrap(lookup(), "closure", methodType(Object.class, MethodHandle.class));
    invoker = callSite.dynamicInvoker();
    assertThat((String) invoker.invokeWithArguments(handle), is(""));

    handle = lookup().findStatic(ClosureCallSupportTest.class, "concat", genericMethodType(0, true));
    callSite = ClosureCallSupport.bootstrap(lookup(), "closure", methodType(Object.class, MethodHandle.class, Object.class));
    invoker = callSite.dynamicInvoker();
    assertThat((String) invoker.invokeWithArguments(handle, new Object[]{1,2}), is("12"));
  }
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    return new VarargsChecking();
  }

  @Test
  public void check_to_string() throws Throwable {
    CallSite toString = MethodInvocationSupport.bootstrap(lookup(), "toString", methodType(Object.class, Object.class), 0);
    String result = (String) toString.dynamicInvoker().invokeWithArguments(julien());
    assertThat(result, notNullValue());
    assertThat(result, is("Person{name='Julien', email='julien.ponge@insa-lyon.fr'}"));
  }
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    assertThat(result, is("Person{name='Julien', email='julien.ponge@insa-lyon.fr'}"));
  }

  @Test
  public void check_set_name() throws Throwable {
    CallSite setName = MethodInvocationSupport.bootstrap(lookup(), "setName", methodType(Object.class, Object.class, Object.class), 0);
    Person julien = julien();
    setName.dynamicInvoker().invokeWithArguments(julien, "Julien Ponge");
    assertThat(julien.name, is("Julien Ponge"));
  }
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    assertThat(julien.name, is("Julien Ponge"));
  }

  @Test
  public void check_equals() throws Throwable {
    CallSite equals = MethodInvocationSupport.bootstrap(lookup(), "equals", methodType(Object.class, Object.class, Object.class), 0);
    Person julien = julien();
    Boolean result = (Boolean) equals.dynamicInvoker().invokeWithArguments(julien, julien);
    assertThat(result, is(true));
  }
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    assertThat(result, is(true));
  }

  @Test
  public void check_field_read() throws Throwable {
    CallSite name = MethodInvocationSupport.bootstrap(lookup(), "name", methodType(Object.class, Object.class), 0);
    String result = (String) name.dynamicInvoker().invokeWithArguments(julien());
    assertThat(result, notNullValue());
    assertThat(result, is("Julien"));
  }
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    assertThat(result, is("Julien"));
  }

  @Test(expectedExceptions = NoSuchMethodError.class)
  public void check_bogus() throws Throwable {
    CallSite bogus = MethodInvocationSupport.bootstrap(lookup(), "bogus", methodType(Object.class, Object.class), 0);
    bogus.dynamicInvoker().invokeWithArguments(julien());
  }
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    bogus.dynamicInvoker().invokeWithArguments(julien());
  }

  @Test
  public void check_many_to_string() throws Throwable {
    CallSite toString = MethodInvocationSupport.bootstrap(lookup(), "toString", methodType(Object.class, Object.class), 0);
    MethodHandle toStringMH = toString.dynamicInvoker();

    for (int i = 0; i < 5; i++) {
      String result = (String) toStringMH.invokeWithArguments(julien());
      assertThat(result, is("Person{name='Julien', email='julien.ponge@insa-lyon.fr'}"));
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  }

  @Test
  public void check_primitive_argument_allowance() throws Throwable {
    List<String> list = Arrays.asList("a", "b", "c");
    CallSite get = MethodInvocationSupport.bootstrap(lookup(), "get", methodType(Object.class, Object.class, Object.class), 0);

    MethodHandle handle = get.dynamicInvoker();
    assertThat(((String) handle.invokeWithArguments(list, 0)), is("a"));
    assertThat(((String) handle.invokeWithArguments(list, 1)), is("b"));
    assertThat(((String) handle.invokeWithArguments(list, 2)), is("c"));
  }
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    assertThat(((String) handle.invokeWithArguments(list, 2)), is("c"));
  }

  @Test
  public void check_varags() throws Throwable {
    CallSite concat = MethodInvocationSupport.bootstrap(lookup(), "concat", methodType(Object.class, Object.class, Object.class, Object.class, Object.class, Object.class), 0);
    VarargsChecking receiver = varargsChecking();

    Object result = concat.dynamicInvoker().invokeWithArguments(receiver, "-", "a", "b", "c");
    assertThat(result, notNullValue());
    assertThat(result, instanceOf(String.class));
    assertThat((String) result, is("a-b-c"));

    concat = MethodInvocationSupport.bootstrap(lookup(), "concat", methodType(Object.class, Object.class, Object.class, Object.class), 0);
    result = concat.dynamicInvoker().invokeWithArguments(receiver, "-", new String[]{"a", "b", "c"});
    assertThat(result, notNullValue());
    assertThat(result, instanceOf(String.class));
    assertThat((String) result, is("a-b-c"));
  }
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