1/*
2 * Copyright (c) 2006, 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
24import java.io.File;
25import java.io.IOException;
26import java.nio.charset.Charset;
27import java.util.*;
28import javax.tools.*;
29
30import static javax.tools.StandardLocation.CLASS_PATH;
31import static javax.tools.StandardLocation.SOURCE_PATH;
32import static javax.tools.StandardLocation.CLASS_OUTPUT;
33
34public class ToolTester implements AutoCloseable {
35    public final File test_src     = new File(System.getProperty("test.src", "."));
36    public final File test_classes = new File(System.getProperty("test.classes", "."));
37    public final List<File> test_class_path = pathToFiles(System.getProperty("test.class.path"),
38                                     Arrays.asList(test_classes));
39    public final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
40    public final StandardJavaFileManager fm = getFileManager(tool, null, null);
41    public JavaCompiler.CompilationTask task = null;
42    public final StandardJavaFileManager getFileManager(JavaCompiler tool,
43                                                        DiagnosticListener<JavaFileObject> dl,
44                                                        Charset encoding) {
45        StandardJavaFileManager fm = tool.getStandardFileManager(dl, null, encoding);
46        try {
47            fm.setLocation(SOURCE_PATH,  Arrays.asList(test_src));
48            fm.setLocation(CLASS_PATH,   test_class_path);
49            fm.setLocation(CLASS_OUTPUT, Arrays.asList(test_classes));
50        } catch (IOException e) {
51            throw new AssertionError(e);
52        }
53        return fm;
54    }
55
56    protected List<File> pathToFiles(String path, List<File> defaultPath) {
57        List<File> files = new ArrayList<>();
58        for (String f: path.split(File.pathSeparator)) {
59            if (f.isEmpty())
60                continue;
61            File file = new File(f);
62            if (file.exists())
63                files.add(file);
64        }
65        if (files.isEmpty())
66            files.addAll(defaultPath);
67        return files;
68    }
69
70    protected <T> List<T> join(List<T> a, List<T> b) {
71        if (a.isEmpty())
72            return b;
73        if (b.isEmpty())
74            return a;
75        List<T> result = new ArrayList<>();
76        result.addAll(a);
77        result.addAll(b);
78        return result;
79    }
80
81    @Override
82    public void close() throws IOException {
83        fm.close();
84    }
85}
86