Java example source code file (T6357331.java)

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Java - Java tags/keywords

assertionerror, illegalstateexception, javacompiler, javactask, printwriter, stringwriter, t6357331, tasklistener, util

The T6357331.java Java example source code

/*
 * Copyright (c) 2006, 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 6357331
 * @summary NPE from JavacTask.getElements() after calling CompilationTask.run
 */
import java.io.*;
import java.util.Arrays;
import javax.tools.*;
import com.sun.source.util.*;

public class T6357331
{
    public static void main(String... args) {
        JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
        PrintWriter out = new PrintWriter(new StringWriter());
        final JavacTask task = (JavacTask) (tool.getTask(out, null, null, null, null, null));

        // 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
        }
    }
}