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/*
* 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);
}
}
}
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