1 /*
   2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.io.File;
  25 import java.lang.reflect.Method;
  26 import java.util.Arrays;
  27 
  28 
  29 public class Wrapper {
  30     public static void main(String... args) throws Exception {
  31         if (!isSJavacOnClassPath()) {
  32             System.out.println("sjavac not available: pass by default");
  33             return;
  34         }
  35 
  36         String testClassName = args[0];
  37         String[] testArgs = Arrays.copyOfRange(args, 1, args.length);
  38 
  39         File srcDir = new File(System.getProperty("test.src"));
  40         File clsDir = new File(System.getProperty("test.classes"));
  41 
  42         File src = new File(srcDir, testClassName + ".java");
  43         File cls = new File(clsDir, testClassName + ".class");
  44 
  45         if (cls.lastModified() < src.lastModified()) {
  46             System.err.println("Recompiling test class...");
  47             String[] javacArgs = { "-d", clsDir.getPath(), src.getPath() };
  48             int rc = com.sun.tools.javac.Main.compile(javacArgs);
  49             if (rc != 0)
  50                 throw new Exception("compilation failed");
  51         }
  52 
  53         Class<?> sjavac = Class.forName(testClassName);
  54         Method main = sjavac.getMethod("main", String[].class);
  55         main.invoke(null, new Object[] { testArgs });
  56     }
  57 
  58     private static boolean isSJavacOnClassPath() {
  59         String cls = "com/sun/tools/sjavac/Main.class";
  60         return Wrapper.class.getClassLoader().getResource(cls) != null;
  61     }
  62 }