t6357331.java

来自「是一款用JAVA 编写的编译器 具有很强的编译功能」· Java 代码 · 共 71 行

/*
 * Copyright 2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.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
	}
    }
}