/*

 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @run testng/othervm -Diters=10    -Xint                   VarHandleTestAccessByte

 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 VarHandleTestAccessByte

 * @run testng/othervm -Diters=20000                         VarHandleTestAccessByte

 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation  VarHandleTestAccessByte

 */

import org.testng.annotations.BeforeClass;

import org.testng.annotations.DataProvider;

import org.testng.annotations.Test;

import java.lang.invoke.MethodHandles;

import java.lang.invoke.VarHandle;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import static org.testng.Assert.*;

public class VarHandleTestAccessByte extends VarHandleBaseTest {

    static byte static_v;

    byte v;

    VarHandle vhFinalField;

    VarHandle vhField;

    VarHandle vhStaticField;

    VarHandle vhStaticFinalField;

    VarHandle vhArray;

    @BeforeClass

    public void setup() throws Exception {

        vhFinalField = MethodHandles.lookup().findVarHandle(

                VarHandleTestAccessByte.class, "final_v", byte.class);

        vhField = MethodHandles.lookup().findVarHandle(

                VarHandleTestAccessByte.class, "v", byte.class);

        vhStaticFinalField = MethodHandles.lookup().findStaticVarHandle(

            VarHandleTestAccessByte.class, "static_final_v", byte.class);

        vhStaticField = MethodHandles.lookup().findStaticVarHandle(

            VarHandleTestAccessByte.class, "static_v", byte.class);

        vhArray = MethodHandles.arrayElementVarHandle(byte[].class);

    }

    @DataProvider

    public Object[][] varHandlesProvider() throws Exception {

        List<VarHandle> vhs = new ArrayList<>();

        vhs.add(vhField);

        vhs.add(vhStaticField);

        vhs.add(vhArray);

        return vhs.stream().map(tc -> new Object[]{tc}).toArray(Object[][]::new);

    }

    @Test(dataProvider = "varHandlesProvider")

    public void testIsAccessModeSupported(VarHandle vh) {

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.SET));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_VOLATILE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.SET_VOLATILE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_ACQUIRE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.SET_RELEASE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_OPAQUE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.SET_OPAQUE));

    }

    @DataProvider

    public Object[][] typesProvider() throws Exception {

        List<Object[]> types = new ArrayList<>();

        types.add(new Object[] {vhField, Arrays.asList(VarHandleTestAccessByte.class)});

        types.add(new Object[] {vhStaticField, Arrays.asList()});

        types.add(new Object[] {vhArray, Arrays.asList(byte[].class, int.class)});

        return types.stream().toArray(Object[][]::new);

    }

    @Test(dataProvider = "typesProvider")

    public void testTypes(VarHandle vh, List<Class<?>> pts) {

        assertEquals(vh.varType(), byte.class);

        assertEquals(vh.coordinateTypes(), pts);

        testTypes(vh);

    }

    @Test

    public void testLookupInstanceToStatic() {

        checkIAE("Lookup of static final field to instance final field", () -> {

            MethodHandles.lookup().findStaticVarHandle(

                    VarHandleTestAccessByte.class, "final_v", byte.class);

        });

        checkIAE("Lookup of static field to instance field", () -> {

            MethodHandles.lookup().findStaticVarHandle(

                    VarHandleTestAccessByte.class, "v", byte.class);

        });

    }

    @Test

    public void testLookupStaticToInstance() {

        checkIAE("Lookup of instance final field to static final field", () -> {

            MethodHandles.lookup().findVarHandle(

                VarHandleTestAccessByte.class, "static_final_v", byte.class);

        });

        checkIAE("Lookup of instance field to static field", () -> {

            vhStaticField = MethodHandles.lookup().findVarHandle(

                VarHandleTestAccessByte.class, "static_v", byte.class);

        });

    }

    @DataProvider

    public Object[][] accessTestCaseProvider() throws Exception {

        List<AccessTestCase<?>> cases = new ArrayList<>();

        cases.add(new VarHandleAccessTestCase("Instance final field",

                                              vhFinalField, vh -> testInstanceFinalField(this, vh)));

        cases.add(new VarHandleAccessTestCase("Instance final field unsupported",

                                              vhFinalField, vh -> testInstanceFinalFieldUnsupported(this, vh),

                                              false));

        cases.add(new VarHandleAccessTestCase("Static final field",

                                              vhStaticFinalField, VarHandleTestAccessByte::testStaticFinalField));

        cases.add(new VarHandleAccessTestCase("Static final field unsupported",

                                              vhStaticFinalField, VarHandleTestAccessByte::testStaticFinalFieldUnsupported,

                                              false));

        cases.add(new VarHandleAccessTestCase("Instance field",

                                              vhField, vh -> testInstanceField(this, vh)));

        cases.add(new VarHandleAccessTestCase("Instance field unsupported",

                                              vhField, vh -> testInstanceFieldUnsupported(this, vh),

                                              false));

        cases.add(new VarHandleAccessTestCase("Static field",

                                              vhStaticField, VarHandleTestAccessByte::testStaticField));

        cases.add(new VarHandleAccessTestCase("Static field unsupported",

                                              vhStaticField, VarHandleTestAccessByte::testStaticFieldUnsupported,

                                              false));

        cases.add(new VarHandleAccessTestCase("Array",

                                              vhArray, VarHandleTestAccessByte::testArray));

        cases.add(new VarHandleAccessTestCase("Array unsupported",

                                              vhArray, VarHandleTestAccessByte::testArrayUnsupported,

                                              false));

        cases.add(new VarHandleAccessTestCase("Array index out of bounds",

                                              vhArray, VarHandleTestAccessByte::testArrayIndexOutOfBounds,

                                              false));

        // Work around issue with jtreg summary reporting which truncates

        // the String result of Object.toString to 30 characters, hence

        // the first dummy argument

        return cases.stream().map(tc -> new Object[]{tc.toString(), tc}).toArray(Object[][]::new);

    }

    @Test(dataProvider = "accessTestCaseProvider")

    public <T> void testAccess(String desc, AccessTestCase<T> atc) throws Throwable {

        T t = atc.get();

        int iters = atc.requiresLoop() ? ITERS : 1;

        for (int c = 0; c < iters; c++) {

            atc.testAccess(t);

        }

    }

    static void testInstanceFinalField(VarHandleTestAccessByte recv, VarHandle vh) {

        // Plain

        {

            byte x = (byte) vh.get(recv);

        }

        // Volatile

        {

            byte x = (byte) vh.getVolatile(recv);

        }

        // Lazy

        {

            byte x = (byte) vh.getAcquire(recv);

        }

        // Opaque

        {

            byte x = (byte) vh.getOpaque(recv);

        }

    }

    static void testInstanceFinalFieldUnsupported(VarHandleTestAccessByte recv, VarHandle vh) {

        checkUOE(() -> {

        });

        checkUOE(() -> {

        });

        checkUOE(() -> {

        });

        checkUOE(() -> {

        });

    }

    static void testStaticFinalField(VarHandle vh) {

        // Plain

        {

            byte x = (byte) vh.get();

        }

        // Volatile

        {

            byte x = (byte) vh.getVolatile();

        }

        // Lazy

        {

            byte x = (byte) vh.getAcquire();

        }

        // Opaque

        {

            byte x = (byte) vh.getOpaque();

        }

    }

    static void testStaticFinalFieldUnsupported(VarHandle vh) {

        checkUOE(() -> {

        });

        checkUOE(() -> {

        });

        checkUOE(() -> {

        });

        checkUOE(() -> {

        });

    }

    static void testInstanceField(VarHandleTestAccessByte recv, VarHandle vh) {

        // Plain

        {

            byte x = (byte) vh.get(recv);

        }

        // Volatile

        {

            byte x = (byte) vh.getVolatile(recv);

        }

        // Lazy

        {

            byte x = (byte) vh.getAcquire(recv);

        }

        // Opaque

        {

            byte x = (byte) vh.getOpaque(recv);

        }

    }

    static void testInstanceFieldUnsupported(VarHandleTestAccessByte recv, VarHandle vh) {

    }

    static void testStaticField(VarHandle vh) {

        // Plain

        {

            byte x = (byte) vh.get();

        }

        // Volatile

        {

            byte x = (byte) vh.getVolatile();

        }

        // Lazy

        {

            byte x = (byte) vh.getAcquire();

        }

        // Opaque

        {

            byte x = (byte) vh.getOpaque();