1/*
2 * Copyright (c) 2015, 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package build.tools.module;
27
28import java.io.BufferedReader;
29import java.io.BufferedWriter;
30import java.io.IOException;
31import java.io.InputStream;
32import java.io.InputStreamReader;
33import java.io.PrintWriter;
34import java.nio.charset.StandardCharsets;
35import java.nio.file.Files;
36import java.nio.file.Path;
37import java.nio.file.Paths;
38import java.util.Arrays;
39import java.util.Set;
40import java.util.stream.Collectors;
41import java.util.stream.Stream;
42
43public class GenModuleLoaderMap {
44    private static final String USAGE =
45        "GenModuleLoaderMap -o <output-file> -boot m1[,m2]* -platform m3[,m4]* <original-source>";
46
47    public static void main(String... args) throws Exception {
48        // default set of boot modules and ext modules
49        Stream<String> bootModules = Stream.empty();
50        Stream<String> platformModules = Stream.empty();
51        Path outfile = null;
52        Path source = null;
53        for (int i=0; i < args.length; i++) {
54            String option = args[i];
55            if (option.startsWith("-")) {
56                String arg = args[++i];
57                if (option.equals("-boot")) {
58                    String[] mns = arg.split(",");
59                    bootModules = Stream.concat(bootModules, Arrays.stream(mns));
60                } else if (option.equals("-platform")) {
61                    String[] mns = arg.split(",");
62                    platformModules = Stream.concat(platformModules, Arrays.stream(mns));
63                } else if (option.equals("-o")) {
64                    outfile = Paths.get(arg);
65                } else {
66                    throw new IllegalArgumentException("invalid option: " + option);
67                }
68            } else {
69                source = Paths.get(option);
70            }
71        }
72
73        if (outfile == null) {
74            throw new IllegalArgumentException("-o must be specified");
75        }
76        if (Files.notExists(source)) {
77            throw new IllegalArgumentException(source + " not exist");
78        }
79
80        boolean needsQuotes = outfile.toString().contains(".java.tmp");
81
82        try (BufferedWriter bw = Files.newBufferedWriter(outfile, StandardCharsets.UTF_8);
83             PrintWriter writer = new PrintWriter(bw)) {
84            for (String line : Files.readAllLines(source)) {
85                if (line.contains("@@BOOT_MODULE_NAMES@@")) {
86                    line = patch(line, "@@BOOT_MODULE_NAMES@@", bootModules, needsQuotes);
87                } else if (line.contains("@@PLATFORM_MODULE_NAMES@@")) {
88                    line = patch(line, "@@PLATFORM_MODULE_NAMES@@", platformModules, needsQuotes);
89                }
90                writer.println(line);
91            }
92        }
93    }
94
95    private static String patch(String s, String tag, Stream<String> stream, boolean needsQuotes) {
96        String mns = null;
97        if (needsQuotes) {
98            mns = stream.sorted()
99                .collect(Collectors.joining("\",\n            \""));
100        } else {
101            mns = stream.sorted()
102                .collect(Collectors.joining("\n"));
103        }
104        return s.replace(tag, mns);
105    }
106
107    /**
108     * Reads the contents of the given modules file.
109     */
110    private static Set<String> readModuleSet(String name) throws IOException {
111        try (InputStream is = GenModuleLoaderMap.class.getResourceAsStream(name);
112             BufferedReader reader = new BufferedReader(new InputStreamReader(is))) {
113            return reader.lines().collect(Collectors.toSet());
114        }
115    }
116}
117