jdk8-mips64-public/langtools: test/tools/javac/defaultMethods/TestNoBridgeOnDefaults.java@a1dc543483fc

     1 /*

     2  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.

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

     4  *

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

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

     7  * published by the Free Software Foundation.

     8  *

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

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

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

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

    13  * accompanied this code).

    14  *

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

    16  * 2 along with this work; if not, write to the Free Software Foundation,

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

    18  *

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

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

    21  * questions.

    22  */

    24 /*

    25  * @test

    26  * @ignore awaits for VM support

    27  * @summary  check that javac does not generate bridge methods for defaults

    28  * @compile -XDallowDefaultMethods TestNoBridgeOnDefaults.java

    29  * @run main TestNoBridgeOnDefaults

    30  */

    32 import com.sun.tools.classfile.ClassFile;

    33 import com.sun.tools.classfile.ConstantPool.*;

    34 import com.sun.tools.classfile.Method;

    36 import java.io.*;

    38 public class TestNoBridgeOnDefaults {

    40     interface A<X> {

    41         default <Y> A<X> m(X x, Y y) { return Impl.<X,Y>m1(this, x, y); }

    42     }

    44     static abstract class B<X> implements A<X> { }

    46     interface C<X> extends A<X> {

    47         default <Y> C<X> m(X x, Y y) { return Impl.<X,Y>m2(this, x, y); }

    48     }

    50     static abstract class D<X> extends B<X> implements C<X> { }

    52     static class Impl {

    53        static <X, Y> A<X> m1(A<X> rec, X x, Y y) { return null; }

    54        static <X, Y> C<X> m2(C<X> rec, X x, Y y) { return null; }

    55     }

    57     static final String[] SUBTEST_NAMES = { B.class.getName() + ".class", D.class.getName() + ".class" };

    58     static final String TEST_METHOD_NAME = "m";

    60     public static void main(String... args) throws Exception {

    61         new TestNoBridgeOnDefaults().run();

    62     }

    64     public void run() throws Exception {

    65         String workDir = System.getProperty("test.classes");

    66         for (int i = 0 ; i < SUBTEST_NAMES.length ; i ++) {

    67             File compiledTest = new File(workDir, SUBTEST_NAMES[i]);

    68             checkNoBridgeOnDefaults(compiledTest);

    69         }

    70     }

    72     void checkNoBridgeOnDefaults(File f) {

    73         System.err.println("check: " + f);

    74         try {

    75             ClassFile cf = ClassFile.read(f);

    76             for (Method m : cf.methods) {

    77                 String mname = m.getName(cf.constant_pool);

    78                 if (mname.equals(TEST_METHOD_NAME)) {

    79                     throw new Error("unexpected bridge method found " + m);

    80                 }

    81             }

    82         } catch (Exception e) {

    83             e.printStackTrace();

    84             throw new Error("error reading " + f +": " + e);

    85         }

    86     }

    87 }

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