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

    public void testInvokeConstructor2() throws Throwable {
        MethodHandle handle = Binder
                .from(Constructable.class, String.class, String.class)
                .invokeConstructorQuiet(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 testGetField() throws Throwable {

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        Fields fields = new Fields();
        MethodHandle handle = Binder
                .from(String.class, Fields.class)
                .getField(LOOKUP, "instanceField");
        
        assertEquals(MethodType.methodType(String.class, Fields.class), handle.type());
        assertEquals("initial", (String)handle.invokeExact(fields));
    }


    @Test
    public void testGetField2() throws Throwable {

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        Fields fields = new Fields();
        MethodHandle handle = Binder
                .from(String.class, Fields.class)
                .getFieldQuiet(LOOKUP, "instanceField");


        assertEquals(MethodType.methodType(String.class, Fields.class), handle.type());
        assertEquals("initial", (String)handle.invokeExact(fields));
    }


    @Test
    public void testGetStatic() throws Throwable {

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    public void testGetStatic() throws Throwable {
        MethodHandle handle = Binder
                .from(String.class)
                .getStatic(LOOKUP, Fields.class, "staticField");


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


    @Test
    public void testGetStatic2() throws Throwable {

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    public void testGetStatic2() throws Throwable {
        MethodHandle handle = Binder
                .from(String.class)
                .getStaticQuiet(LOOKUP, Fields.class, "staticField");


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


    @Test
    public void testSetField() throws Throwable {

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        Fields fields = new Fields();
        MethodHandle handle = Binder
                .from(void.class, Fields.class, String.class)
                .setField(LOOKUP, "instanceField");


        assertEquals(MethodType.methodType(void.class, Fields.class, String.class), handle.type());
        handle.invokeExact(fields, "modified");
        assertEquals("modified", fields.instanceField);
    }


    @Test

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        Fields fields = new Fields();
        MethodHandle handle = Binder
                .from(void.class, Fields.class, String.class)
                .setFieldQuiet(LOOKUP, "instanceField");


        assertEquals(MethodType.methodType(void.class, Fields.class, String.class), handle.type());
        handle.invokeExact(fields, "modified");
        assertEquals("modified", fields.instanceField);
    }


    @Test

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        try {
            MethodHandle handle = Binder
                    .from(void.class, String.class)
                    .setStatic(LOOKUP, Fields.class, "staticField");


            assertEquals(MethodType.methodType(void.class, String.class), handle.type());
            handle.invokeExact("modified");
            assertEquals("modified", Fields.staticField);
        } finally {
            Fields.staticField = "initial";
        }

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        try {
            MethodHandle handle = Binder
                    .from(void.class, String.class)
                    .setStaticQuiet(LOOKUP, Fields.class, "staticField");


            assertEquals(MethodType.methodType(void.class, String.class), handle.type());
            handle.invokeExact("modified");
            assertEquals("modified", Fields.staticField);
        } finally {
            Fields.staticField = "initial";
        }

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    public void testNop() throws Throwable {
        MethodHandle handle = Binder
                .from(void.class, int.class, String.class)
                .nop();
        
        assertEquals(MethodType.methodType(void.class, int.class, String.class), handle.type());
        try {
            handle.invokeExact(1, "foo");
        } catch (Throwable t) {
            assertTrue("should not reach here", false);
        }

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