1 /*
   2  * Copyright (c) 2015, 2018, 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 
  26 package jdk.jpackager.internal;
  27 
  28 import java.io.BufferedReader;
  29 import java.io.File;
  30 import java.io.IOException;
  31 import java.io.InputStream;
  32 import java.io.InputStreamReader;
  33 import java.io.UnsupportedEncodingException;
  34 import java.util.Optional;
  35 import java.lang.module.ModuleDescriptor;
  36 import java.lang.module.ModuleFinder;
  37 import java.lang.module.ModuleReference;
  38 import java.lang.module.ModuleReader;
  39 import java.nio.file.Path;
  40 import java.util.HashSet;
  41 import java.util.LinkedHashSet;
  42 import java.util.List;
  43 import java.util.NoSuchElementException;
  44 import java.util.Set;
  45 
  46 import jdk.tools.jlink.internal.packager.AppRuntimeImageBuilder;
  47 
  48 public final class RedistributableModules {
  49     private static final String JDK_JPACKAGER_MODULE = "jdk.jpackager";
  50 
  51     private RedistributableModules() {}
  52 
  53     public static String stripComments(String line) {
  54         String result = line.trim();
  55         int i = result.indexOf(";");
  56 
  57         if (i >= 0) {
  58           result = result.substring(0, i);
  59           result = result.trim();
  60         }
  61 
  62         return result;
  63     }
  64 
  65     public static Set<String> getRedistributableModules(List<Path> modulePath,
  66             String filename) {
  67         Set<String> result = null;
  68 
  69         Set<String> addModules = new HashSet<>();
  70         Set<String> limitModules = new HashSet<>();
  71         ModuleFinder finder = AppRuntimeImageBuilder.moduleFinder(
  72                 modulePath, addModules, limitModules);
  73         Optional<ModuleReference> mref = finder.find(JDK_JPACKAGER_MODULE);
  74 
  75         if (mref.isPresent()) {
  76             ModuleReader reader = null;
  77 
  78             try {
  79                 reader = mref.get().open();
  80             } catch (NoSuchElementException | IOException ex) {
  81             }
  82 
  83             if (reader != null) {
  84                 Optional<InputStream> stream = null;
  85 
  86                 try {
  87                     stream = reader.open(filename);
  88                 } catch (IOException ex) {
  89                 }
  90 
  91                 if (stream != null) {
  92                     if (stream.isPresent()) {
  93                         BufferedReader br = null;
  94 
  95                         try {
  96                             br = new BufferedReader(new InputStreamReader(
  97                                     stream.get(), "UTF-8"));
  98                         } catch (UnsupportedEncodingException ex) {
  99                         }
 100 
 101                         if (br != null) {
 102                             result = new LinkedHashSet<String>();
 103                             String line;
 104 
 105                             try {
 106                                 while ((line = br.readLine()) != null) {
 107                                     String module = stripComments(line);
 108 
 109                                     if (!module.isEmpty()) {
 110                                         result.add(module);
 111                                     }
 112                                 }
 113                             } catch (IOException ex) {
 114                             }
 115                         }
 116                     }
 117                 }
 118             }
 119         }
 120 
 121         return result;
 122     }
 123 
 124     public static String getModuleVersion(File moduleFile,
 125             List<Path> modulePath, Set<String> addModules,
 126             Set<String> limitModules) {
 127         String result = "";
 128 
 129         ModFile modFile = new ModFile(moduleFile);
 130         ModuleFinder finder = AppRuntimeImageBuilder.moduleFinder(modulePath,
 131                 addModules, limitModules);
 132         Optional<ModuleReference> mref = finder.find(modFile.getModName());
 133 
 134         if (mref.isPresent()) {
 135             ModuleDescriptor descriptor = mref.get().descriptor();
 136 
 137             if (descriptor != null) {
 138                 Optional<ModuleDescriptor.Version> version =
 139                         descriptor.version();
 140 
 141                 if (version.isPresent()) {
 142                     result = version.get().toString();
 143                 }
 144             }
 145         }
 146 
 147         return result;
 148     }
 149 }