| /* |
| * 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. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8020968 |
| * @summary Basic test for Stream<StackFrame> state |
| * @run main StackStreamState |
| */ |
| |
| import java.lang.StackWalker.StackFrame; |
| import java.util.stream.Stream; |
| |
| public class StackStreamState { |
| public static void main(String... args) { |
| StackStreamState test = new StackStreamState(); |
| test.testStatic(); |
| test.testInstance(); |
| test.testLocal(); |
| } |
| |
| private static Stream<StackFrame> staticStream; |
| private Stream<StackFrame> instanceStream; |
| private final StackWalker walker = StackWalker.getInstance(); |
| void testStatic() { |
| walker.walk(s -> { |
| staticStream = s; |
| return null; |
| }); |
| checkStreamState(staticStream); |
| } |
| void testInstance() { |
| walker.walk(s -> { |
| instanceStream = s; |
| return null; |
| }); |
| checkStreamState(instanceStream); |
| } |
| void testLocal() { |
| Stream<StackFrame> stream = walker.walk(s -> { |
| return s; |
| }); |
| checkStreamState(stream); |
| } |
| void checkStreamState(Stream<StackFrame> stream) { |
| try { |
| stream.count(); |
| throw new RuntimeException("IllegalStateException not thrown"); |
| } catch (IllegalStateException e) { |
| System.out.println("Got expected IllegalStateException: " + e.getMessage()); |
| e.printStackTrace(System.out); |
| } |
| } |
| } |