test/langtools/tools/javac/lambda/SE5AnnotationsOnLambdaParameters.java

/*
 * 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.
 *
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 * questions.
 */

/*
 * @test
 * @bug 8138612
 * @summary Do not retain declaration annotations on lambda formal parameters
 * @run main SE5AnnotationsOnLambdaParameters
 */

import java.lang.annotation.Annotation;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.Method;

public class SE5AnnotationsOnLambdaParameters {
    @Retention(RetentionPolicy.RUNTIME)
    @interface Annot {}

    interface Runnable {
        void run(int x);
    }

    public void run(Runnable r) {}

    public static void main(@Annot String [] args) throws ClassNotFoundException {
        new SE5AnnotationsOnLambdaParameters().run((@Annot int x) -> { System.out.println(x + args.length); });
        Class<?> clazz = Class.forName("SE5AnnotationsOnLambdaParameters");
        for (Method m : clazz.getDeclaredMethods()) {
            if (m.getName().startsWith("lambda$")) {
                for (Annotation[] annots : m.getParameterAnnotations()) {
                    if (annots.length > 0) {
                        throw new AssertionError("Unexpected annotations on lambda parameters");
                    }
                }
            }
        }
    }
}