1 /*
 2  * Copyright (c) 2020, 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
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22  */
23 
24 /**
25  * @test
26  * @bug 8244982
27  * @summary Javac has trouble compiling method references
28  * @compile -XDenablePrimitiveClasses StreamsTest.java
29  * @run main/othervm -XX:+EnableValhalla -XX:+EnablePrimitiveClasses StreamsTest
30  */
31 
32 import java.util.Arrays;
33 
34 public class StreamsTest {
35 
36     public static primitive class X {
37 
38         String data;
39 
40         X(String data) {
41             this.data = data;
42         }
43 
44         String data() { return data; }
45 
46         static String accumulate = "";
47 
48         static void accumulate(String s) {
49             accumulate += s;
50         }
51 
52         static String streamedData() {
53 
54             X [] xs = new X[] {
55                                  new X("Streams "),
56                                  new X("test "),
57                                  new X("passed OK!")
58                       };
59 
60             Arrays.stream(xs)
61                         .map(X.ref::data)
62                         .filter(p -> p != null)
63                         .forEach(X::accumulate);
64 
65             return accumulate;
66         }
67     }
68 
69     public static void main(String [] args) {
70         if (!X.streamedData().equals("Streams test passed OK!"))
71             throw new AssertionError("Unexpected data in stream");
72     }
73 }