/*

 * 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

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 */

/*

 * @test

 * @bug 6695379

 * @summary Copy method annotations and parameter annotations to synthetic

 * bridge methods

 * @run main AnnotationsAreNotCopiedToBridgeMethodsTest

 */

import java.lang.annotation.ElementType;

import java.lang.annotation.Target;

import java.io.BufferedInputStream;

import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import com.sun.tools.classfile.AccessFlags;

import com.sun.tools.classfile.Attribute;

import com.sun.tools.classfile.Attributes;

import com.sun.tools.classfile.ClassFile;

import com.sun.tools.classfile.Method;

import com.sun.tools.javac.util.Assert;

public class AnnotationsAreNotCopiedToBridgeMethodsTest {

    public static void main(String[] args) throws Exception {

        new AnnotationsAreNotCopiedToBridgeMethodsTest().run();

    }

    void run() throws Exception {

        checkClassFile(Paths.get(System.getProperty("test.classes"),

                this.getClass().getSimpleName() + "$CovariantReturnType.class"));

        checkClassFile(Paths.get(System.getProperty("test.classes"),

                this.getClass().getSimpleName() +

                "$CovariantReturnType$VisibilityChange.class"));

    }

    void checkClassFile(final Path cfilePath) throws Exception {

        ClassFile classFile = ClassFile.read(

                new BufferedInputStream(Files.newInputStream(cfilePath)));

        for (Method method : classFile.methods) {

            if (method.access_flags.is(AccessFlags.ACC_BRIDGE)) {

                checkForAttr(method.attributes,

                        "Annotations hasn't been copied to bridge method",

                        Attribute.RuntimeVisibleAnnotations,

                        Attribute.RuntimeVisibleParameterAnnotations);

            }

        }

    }

    void checkForAttr(Attributes attrs, String errorMsg, String... attrNames) {

        for (String attrName : attrNames) {

            Assert.checkNonNull(attrs.get(attrName), errorMsg);

        }

    }

    @Target(value = {ElementType.PARAMETER})

    @Retention(RetentionPolicy.RUNTIME)

    @interface ParamAnnotation {}

    @Target(value = {ElementType.METHOD})

    @Retention(RetentionPolicy.RUNTIME)

    @interface MethodAnnotation {}

    abstract class T<A,B> {

        B m(A a){return null;}

    }

    class CovariantReturnType extends T<Integer, Integer> {

        @MethodAnnotation

        Integer m(@ParamAnnotation Integer i) {

            return i;

        }

        public class VisibilityChange extends CovariantReturnType {}

    }

}