/*

 * 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

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 * questions.

 */

/*

 * @test

 * @bug 6357331

 * @summary NPE from JavacTask.getElements() after calling CompilationTask.run

 */

import java.io.*;

import java.util.*;

import javax.tools.*;

import com.sun.source.util.*;

public class T6357331

{

    public static void main(String... args) throws IOException {

        JavaCompiler tool = ToolProvider.getSystemJavaCompiler();

        PrintWriter out = new PrintWriter(new StringWriter());

        List<String> opts = Arrays.asList("-d", ".");

        try (StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null)) {

            File thisFile = new File(System.getProperty("test.src"), "T6357331.java");

            Iterable<? extends JavaFileObject> files = fm.getJavaFileObjects(thisFile);

            final JavacTask task = (JavacTask) (tool.getTask(out, fm, null, opts, null, files));

            // set a listener to verify that IllegalStateException is not thrown

            // during the compilation

            task.setTaskListener(new TaskListener() {

                    public void started(TaskEvent e) {

                        task.getElements();

                        task.getTypes();

                    }

                    public void finished(TaskEvent e) { }

                });

            task.call();

            // now the compilation is over, we expect IllegalStateException (not NPE)

            try {

                task.getElements();

                throw new AssertionError("IllegalStateException not thrown");

            }

            catch (IllegalStateException e) {

                // expected

            }

            try {

                task.getTypes();

                throw new AssertionError("IllegalStateException not thrown");

            }

            catch (IllegalStateException e) {

                // expected

            }

        }

    }

}