/*

 * Copyright (c) 2015, 2016, 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

 * @bug 8136421

 * @library / /test/lib

 * @library ../common/patches

 * @modules java.base/jdk.internal.misc

 * @modules jdk.vm.ci/jdk.vm.ci.hotspot

 * @build jdk.vm.ci/jdk.vm.ci.hotspot.CompilerToVMHelper

 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI

 *                   compiler.jvmci.compilerToVM.GetClassInitializerTest

 */

package compiler.jvmci.compilerToVM;

import compiler.jvmci.common.testcases.AbstractClass;

import compiler.jvmci.common.testcases.AbstractClassExtender;

import compiler.jvmci.common.testcases.DoNotExtendClass;

import compiler.jvmci.common.testcases.MultipleImplementersInterfaceExtender;

import compiler.jvmci.common.testcases.SingleImplementer;

import compiler.jvmci.common.testcases.SingleImplementerInterface;

import jdk.test.lib.Asserts;

import jdk.test.lib.Utils;

import jdk.vm.ci.hotspot.CompilerToVMHelper;

import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;

import jdk.vm.ci.hotspot.HotSpotResolvedObjectType;

import java.util.HashSet;

import java.util.Set;

public class GetClassInitializerTest {

    public static void main(String args[]) {

        GetClassInitializerTest test = new GetClassInitializerTest();

        for (TestCase tcase : createTestCases()) {

            test.runTest(tcase);

        }

    }

    private static Set<TestCase> createTestCases() {

        Set<TestCase> result = new HashSet<>();

        // a simple class with initializer

        result.add(new TestCase(SingleImplementer.class, true));

        // an interface with initializer

        result.add(new TestCase(SingleImplementerInterface.class, true));

        // an abstract class with initializer

        result.add(new TestCase(AbstractClass.class, true));

        // a class without initializer, extending class with initializer

        result.add(new TestCase(AbstractClassExtender.class, false));

        // an interface without initializer

        result.add(new TestCase(MultipleImplementersInterfaceExtender.class, false));

        // a class without initializer

        result.add(new TestCase(DoNotExtendClass.class, false));

        return result;

    }

    private void runTest(TestCase tcase) {

        System.out.println(tcase);

        String className = tcase.holder.getName();

        HotSpotResolvedObjectType resolvedClazz = CompilerToVMHelper

                .lookupType(Utils.toJVMTypeSignature(tcase.holder),

                        getClass(), /* resolve = */ true);

        HotSpotResolvedJavaMethod initializer = CompilerToVMHelper

                .getClassInitializer(resolvedClazz);

        if (tcase.isPositive) {

            Asserts.assertNotNull(initializer, "Couldn't get initializer for "

                    + className);

            Asserts.assertEQ(initializer.getName(), "<clinit>",

                    "Unexpected initializer name for " + className);

        } else {

            Asserts.assertNull(initializer, "Unexpected: found initializer for "

                    + className);

        }

    }

    private static class TestCase {

        public final Class<?> holder;

        public final boolean isPositive;

        public TestCase(Class<?> clazz, boolean isPositive) {

            this.holder = clazz;

            this.isPositive = isPositive;

        }

        @Override

        public String toString() {

            return "CASE: clazz=" + holder.getName()

                    + ", isPositive=" + isPositive;

        }

    }

}