/*

 * Copyright (c) 2014, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 */

import java.io.File;

import java.lang.reflect.Method;

public class SJavacTestUtil {

    public static void runSjavacTest(String testClassName, String[] args)

            throws Exception {

        if (!isSJavacOnClassPath()) {

            System.out.println("sjavac not available: pass by default");

            return;

        }

        File srcDir = new File(System.getProperty("test.src"));

        File clsDir = new File(System.getProperty("test.classes"));

        File src = new File(srcDir, testClassName + ".java");

        File cls = new File(clsDir, testClassName + ".class");

        if (cls.lastModified() < src.lastModified()) {

            System.err.println("Recompiling test class...");

            String[] javacArgs = { "-d", clsDir.getPath(), src.getPath() };

            int rc = com.sun.tools.javac.Main.compile(javacArgs);

            if (rc != 0)

                throw new Exception("compilation failed");

        }

        Class<?> sjavac = Class.forName(testClassName);

        Method main = sjavac.getMethod("main", String[].class);

        main.invoke(null, new Object[] { args });

    }

    private static boolean isSJavacOnClassPath() {

        String cls = "com/sun/tools/sjavac/Main.class";

        return SJavacTestUtil.class.getClassLoader().getResource(cls) != null;

    }

}