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

java.lang.invoke.MethodHandle.type()
Reports the type of this method handle. Every invocation of this method handle via {@code invokeExact} must exactly match this type. @return the method handle type

        MethodHandle handle = Binder
                .from(LOOKUP, String.class, String.class)
                .foldStatic(BinderTest.class, "alwaysYahooStatic")
                .invoke(target);


        assertEquals(MethodType.methodType(String.class, String.class), handle.type());
        assertEquals("yahoofoo", (String)handle.invokeExact("foo"));
    }


    @Test
    public void testFoldVirtual() throws Throwable {

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                .insert(0, this)
                .foldVirtual("alwaysYahooVirtual")
                .drop(1)
                .invoke(target);


        assertEquals(MethodType.methodType(String.class, String.class), handle.type());
        assertEquals("yahoofoo", (String)handle.invokeExact("foo"));
    }


    @Test
    public void testFilter() throws Throwable {

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        MethodHandle handle = Binder
                .from(String.class, String.class, String.class)
                .filter(0, filter, filter)
                .invoke(target);


        assertEquals(MethodType.methodType(String.class, String.class, String.class), handle.type());
        assertEquals("foobazbarbaz", (String)handle.invokeExact("foo", "bar"));
    }


    @Test
    public void testInvoke() throws Throwable {

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        MethodHandle target = Subjects.concatHandle();
        MethodHandle handle = Binder
                .from(String.class, String.class, String.class)
                .invoke(target);


        assertEquals(MethodType.methodType(String.class, String.class, String.class), handle.type());
        assertEquals("Hello, world", (String) handle.invokeExact("Hello, ", "world"));
    }


    @Test
    public void testInvokeReflected() throws Throwable {

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        Method target = Subjects.class.getMethod("concatStatic", String.class, String.class);
        MethodHandle handle = Binder
                .from(String.class, String.class, String.class)
                .invoke(LOOKUP, target);


        assertEquals(MethodType.methodType(String.class, String.class, String.class), handle.type());
        assertEquals("Hello, world", (String) handle.invokeExact("Hello, ", "world"));
    }


    @Test
    public void testInvokeReflected2() throws Throwable {

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        Method target = Subjects.class.getMethod("concatStatic", String.class, String.class);
        MethodHandle handle = Binder
                .from(String.class, String.class, String.class)
                .invokeQuiet(LOOKUP, target);


        assertEquals(MethodType.methodType(String.class, String.class, String.class), handle.type());
        assertEquals("Hello, world", (String) handle.invokeExact("Hello, ", "world"));
    }


    @Test
    public void testInvokeStatic() throws Throwable {

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    public void testInvokeStatic() throws Throwable {
        MethodHandle handle = Binder
                .from(String.class, String.class, String.class)
                .invokeStatic(LOOKUP, Subjects.class, "concatStatic");


        assertEquals(MethodType.methodType(String.class, String.class, String.class), handle.type());
        assertEquals("Hello, world", (String) handle.invokeExact("Hello, ", "world"));
    }


    @Test
    public void testInvokeStatic2() throws Throwable {

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    public void testInvokeStatic2() throws Throwable {
        MethodHandle handle = Binder
                .from(String.class, String.class, String.class)
                .invokeStaticQuiet(LOOKUP, Subjects.class, "concatStatic");


        assertEquals(MethodType.methodType(String.class, String.class, String.class), handle.type());
        assertEquals("Hello, world", (String) handle.invokeExact("Hello, ", "world"));
    }


    @Test
    public void testInvokeVirtual() throws Throwable {

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    public void testInvokeVirtual2() throws Throwable {
        MethodHandle handle = Binder
                .from(String.class, BinderTest.class, String.class, String.class)
                .invokeVirtualQuiet(LOOKUP, "concatVirtual");


        assertEquals(MethodType.methodType(String.class, BinderTest.class, String.class, String.class), handle.type());
        assertEquals("Hello, world", (String) handle.invokeExact(this, "Hello, ", "world"));
    }


    @Test
    public void testInvokeConstructor() throws Throwable {

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    public void testInvokeConstructor() throws Throwable {
        MethodHandle handle = Binder
                .from(Constructable.class, String.class, String.class)
                .invokeConstructor(LOOKUP, Constructable.class);


        assertEquals(MethodType.methodType(Constructable.class, String.class, String.class), handle.type());
        assertEquals(new Constructable("foo", "bar"), (Constructable) handle.invokeExact("foo", "bar"));
    }


    @Test
    public void testInvokeConstructor2() throws Throwable {

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