1/*
2 * Copyright (c) 2013, 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 */
23
24/*
25 * @test
26 * @bug 8012557
27 * @summary Check that 8012557 is fixed, that interface lambda
28 *          methods are private
29 * @author  Robert Field
30 * @compile SAM.java
31 * @compile A.java
32 * @compile B.java
33 * @compile C.java
34 * @run main PrivateLambdas
35 *
36 * Unless the lambda methods are private, this will fail with:
37 *  AbstractMethodError:
38 *        Conflicting default methods: A.lambda$0 B.lambda$0 C.lambda$0
39 */
40
41import java.lang.reflect.Method;
42import java.lang.reflect.Modifier;
43
44interface X extends A, B, C {
45   default String u() { return " "; }
46   default String name() {
47      return A.super.name() + B.super.name() + C.super.name();
48   }
49}
50
51public class PrivateLambdas implements X {
52   public static void main(String[] args) throws Exception {
53
54      // Check that all the lambda methods are private instance synthetic
55      for (Class<?> k : new Class<?>[] { A.class, B.class, C.class }) {
56         Method[] methods = k.getDeclaredMethods();
57         int lambdaCount = 0;
58         for(Method m : methods) {
59            if (m.getName().startsWith("lambda$")) {
60               ++lambdaCount;
61               int mod = m.getModifiers();
62               if ((mod & Modifier.PRIVATE) == 0) {
63                  throw new Exception("Expected " + m + " to be private");
64               }
65               if (!m.isSynthetic()) {
66                  throw new Exception("Expected " + m + " to be synthetic");
67               }
68               if ((mod & Modifier.STATIC) != 0) {
69                  throw new Exception("Expected " + m + " to be instance method");
70               }
71            }
72         }
73         if (lambdaCount == 0) {
74            throw new Exception("Expected at least one lambda method");
75         }
76      }
77
78      /*
79       * Unless the lambda methods are private, this will fail with:
80       *  AbstractMethodError:
81       *        Conflicting default methods: A.lambda$0 B.lambda$0 C.lambda$0
82       */
83      X x = new PrivateLambdas();
84      if (!x.name().equals(" A B C")) {
85         throw new Exception("Expected ' A B C' got: " + x.name());
86      }
87   }
88}
89