Wrapper.java revision 3573:c4a18ee691c4 
1/*
2 * Copyright (c) 2014, 2016, 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
24import java.io.IOException;
25import java.lang.reflect.Method;
26import java.nio.file.Files;
27import java.nio.file.Path;
28import java.nio.file.Paths;
29import java.util.ArrayList;
30import java.util.Arrays;
31import java.util.List;
32import java.util.stream.Collectors;
33
34public class Wrapper {
35    public static void main(String... args) throws Exception {
36        if (!isSJavacOnClassPath()) {
37            System.out.println("sjavac not available: pass by default");
38            return;
39        }
40
41        String testClassName = args[0];
42        String[] testArgs = Arrays.copyOfRange(args, 1, args.length);
43
44        Path srcDir = Paths.get(System.getProperty("test.src"));
45        Path clsDir = Paths.get(System.getProperty("test.classes"));
46        String clsPath = System.getProperty("test.class.path");
47        String tstMdls = System.getProperty("test.modules");
48
49        Path src = srcDir.resolve(testClassName + ".java");
50        Path cls = clsDir.resolve(testClassName + ".class");
51
52        if (isNewer(src, cls)) {
53            System.err.println("Recompiling test class...");
54            List<String> javacArgs = new ArrayList<>();
55            javacArgs.addAll(Arrays.asList("-d", clsDir.toString()));
56            javacArgs.addAll(Arrays.asList("-sourcepath", srcDir.toString()));
57            javacArgs.addAll(Arrays.asList("-classpath", clsPath));
58            Arrays.stream(tstMdls.split("\\s+"))
59                .filter(s -> s.contains("/"))
60                .map(s -> "--add-exports=" + s + "=ALL-UNNAMED")
61                .collect(Collectors.toCollection(() -> javacArgs));
62            javacArgs.add(src.toString());
63            System.out.println("javac: " + javacArgs);
64            int rc = com.sun.tools.javac.Main.compile(
65                javacArgs.toArray(new String[javacArgs.size()]));
66            if (rc != 0)
67                throw new Exception("compilation failed");
68        }
69
70        Class<?> sjavac = Class.forName(testClassName);
71        Method main = sjavac.getMethod("main", String[].class);
72        main.invoke(null, new Object[] { testArgs });
73    }
74
75    private static boolean isNewer(Path a, Path b) throws IOException {
76        if (Files.notExists(b))
77            return true;
78        return Files.getLastModifiedTime(a).compareTo(Files.getLastModifiedTime(b)) > 0;
79    }
80
81    private static boolean isSJavacOnClassPath() {
82        String cls = "com/sun/tools/sjavac/Main.class";
83        return Wrapper.class.getClassLoader().getResource(cls) != null;
84    }
85}
86