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 package jdk.tools.jlink.internal;
  26 
  27 import java.io.File;
  28 import java.io.IOException;
  29 import java.io.InputStream;
  30 import java.nio.file.Files;
  31 import java.nio.file.Path;
  32 import java.util.ArrayList;
  33 import java.util.List;
  34 import java.util.Objects;
  35 import java.util.function.Consumer;
  36 import java.util.stream.Stream;
  37 
  38 /**
  39  * An Archive backed by a directory.
  40  */
  41 public class DirArchive implements Archive {
  42 
  43     /**
  44      * A File located in a Directory.
  45      */
  46     private class FileEntry extends Archive.Entry {
  47 
  48         private final long size;
  49         private final Path path;
  50 
  51         FileEntry(Path path, String name) {
  52             super(DirArchive.this, getPathName(path), name,
  53                     Archive.Entry.EntryType.CLASS_OR_RESOURCE);
  54             this.path = path;
  55             try {
  56                 size = Files.size(path);
  57             } catch (IOException ex) {
  58                 throw new RuntimeException(ex);
  59             }
  60         }
  61 
  62         /**
  63          * Returns the number of bytes of this file.
  64          */
  65         @Override
  66         public long size() {
  67             return size;
  68         }
  69 
  70         @Override
  71         public InputStream stream() throws IOException {
  72             InputStream stream = Files.newInputStream(path);
  73             open.add(stream);
  74             return stream;
  75         }
  76     }
  77 
  78     private static final String MODULE_INFO = "module-info.class";
  79 
  80     private final Path dirPath;
  81     private final String moduleName;
  82     private final List<InputStream> open = new ArrayList<>();
  83     private final int chop;
  84     private final Consumer<String> log;
  85     private static final Consumer<String> noopConsumer = (String t) -> {
  86     };
  87 
  88     public DirArchive(Path dirPath) {
  89         this(dirPath, noopConsumer);
  90     }
  91 
  92     public DirArchive(Path dirPath, Consumer<String> log) {
  93         Objects.requireNonNull(dirPath);
  94         if (!Files.isDirectory(dirPath)) {
  95             throw new IllegalArgumentException("Not a directory");
  96         }
  97         chop = dirPath.toString().length() + 1;
  98         this.moduleName = Objects.requireNonNull(dirPath.getFileName()).toString();
  99         this.dirPath = dirPath;
 100         this.log = log;
 101     }
 102 
 103     @Override
 104     public String moduleName() {
 105         return moduleName;
 106     }
 107 
 108     @Override
 109     public Path getPath() {
 110         return dirPath;
 111     }
 112 
 113     @Override
 114     public Stream<Entry> entries() {
 115         try {
 116             return Files.walk(dirPath).map(this::toEntry).filter(n -> n != null);
 117         } catch (IOException ex) {
 118             throw new RuntimeException(ex);
 119         }
 120     }
 121 
 122     private Archive.Entry toEntry(Path p) {
 123         if (Files.isDirectory(p)) {
 124             return null;
 125         }
 126         String name = getPathName(p).substring(chop);
 127         if (name.startsWith("_")) {
 128             return null;
 129         }
 130         log.accept(moduleName + "/" + name);
 131         if (name.equals(MODULE_INFO)) {
 132             name = moduleName + "/" + MODULE_INFO;
 133         }
 134         return new FileEntry(p, name);
 135     }
 136 
 137     @Override
 138     public void close() throws IOException {
 139         IOException e = null;
 140         for (InputStream stream : open) {
 141             try {
 142                 stream.close();
 143             } catch (IOException ex) {
 144                 if (e == null) {
 145                     e = ex;
 146                 } else {
 147                     e.addSuppressed(ex);
 148                 }
 149             }
 150         }
 151         if (e != null) {
 152             throw e;
 153         }
 154     }
 155 
 156     @Override
 157     public void open() throws IOException {
 158         // NOOP
 159     }
 160 
 161     private static String getPathName(Path path) {
 162         return path.toString().replace(File.separatorChar, '/');
 163     }
 164 }