1 /* 2 * Copyright (c) 2019, 2020, 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.jpackage.internal; 26 27 import java.io.IOException; 28 import java.nio.file.Files; 29 import java.nio.file.Path; 30 import java.util.ArrayList; 31 import java.util.Collection; 32 import java.util.HashMap; 33 import java.util.List; 34 import java.util.Map; 35 import java.util.function.BiFunction; 36 import java.util.stream.Collectors; 37 import java.util.stream.Stream; 38 39 40 /** 41 * Group of paths. 42 * Each path in the group is assigned a unique id. 43 */ 44 final class PathGroup { PathGroup(Map<Object, Path> paths)45 PathGroup(Map<Object, Path> paths) { 46 entries = new HashMap<>(paths); 47 } 48 getPath(Object id)49 Path getPath(Object id) { 50 if (id == null) { 51 throw new NullPointerException(); 52 } 53 return entries.get(id); 54 } 55 setPath(Object id, Path path)56 void setPath(Object id, Path path) { 57 if (path != null) { 58 entries.put(id, path); 59 } else { 60 entries.remove(id); 61 } 62 } 63 64 /** 65 * All configured entries. 66 */ paths()67 List<Path> paths() { 68 return entries.values().stream().collect(Collectors.toList()); 69 } 70 71 /** 72 * Root entries. 73 */ roots()74 List<Path> roots() { 75 // Sort by the number of path components in ascending order. 76 List<Map.Entry<Path, Path>> sorted = normalizedPaths().stream().sorted( 77 (a, b) -> a.getKey().getNameCount() - b.getKey().getNameCount()).collect( 78 Collectors.toList()); 79 80 // Returns `true` if `a` is a parent of `b` 81 BiFunction<Map.Entry<Path, Path>, Map.Entry<Path, Path>, Boolean> isParentOrSelf = (a, b) -> { 82 return a == b || b.getKey().startsWith(a.getKey()); 83 }; 84 85 return sorted.stream().filter( 86 v -> v == sorted.stream().sequential().filter( 87 v2 -> isParentOrSelf.apply(v2, v)).findFirst().get()).map( 88 v -> v.getValue()).collect(Collectors.toList()); 89 } 90 sizeInBytes()91 long sizeInBytes() throws IOException { 92 long reply = 0; 93 for (Path dir : roots().stream().filter(f -> Files.isDirectory(f)).collect( 94 Collectors.toList())) { 95 try (Stream<Path> stream = Files.walk(dir)) { 96 reply += stream.filter(p -> Files.isRegularFile(p)).mapToLong( 97 f -> f.toFile().length()).sum(); 98 } 99 } 100 return reply; 101 } 102 resolveAt(Path root)103 PathGroup resolveAt(Path root) { 104 return new PathGroup(entries.entrySet().stream().collect( 105 Collectors.toMap(e -> e.getKey(), 106 e -> root.resolve(e.getValue())))); 107 } 108 copy(PathGroup dst)109 void copy(PathGroup dst) throws IOException { 110 copy(this, dst, null, false); 111 } 112 move(PathGroup dst)113 void move(PathGroup dst) throws IOException { 114 copy(this, dst, null, true); 115 } 116 transform(PathGroup dst, TransformHandler handler)117 void transform(PathGroup dst, TransformHandler handler) throws IOException { 118 copy(this, dst, handler, false); 119 } 120 121 static interface Facade<T> { pathGroup()122 PathGroup pathGroup(); 123 paths()124 default Collection<Path> paths() { 125 return pathGroup().paths(); 126 } 127 roots()128 default List<Path> roots() { 129 return pathGroup().roots(); 130 } 131 sizeInBytes()132 default long sizeInBytes() throws IOException { 133 return pathGroup().sizeInBytes(); 134 } 135 resolveAt(Path root)136 T resolveAt(Path root); 137 copy(Facade<T> dst)138 default void copy(Facade<T> dst) throws IOException { 139 pathGroup().copy(dst.pathGroup()); 140 } 141 move(Facade<T> dst)142 default void move(Facade<T> dst) throws IOException { 143 pathGroup().move(dst.pathGroup()); 144 } 145 transform(Facade<T> dst, TransformHandler handler)146 default void transform(Facade<T> dst, TransformHandler handler) throws 147 IOException { 148 pathGroup().transform(dst.pathGroup(), handler); 149 } 150 } 151 152 static interface TransformHandler { copyFile(Path src, Path dst)153 public void copyFile(Path src, Path dst) throws IOException; createDirectory(Path dir)154 public void createDirectory(Path dir) throws IOException; 155 } 156 copy(PathGroup src, PathGroup dst, TransformHandler handler, boolean move)157 private static void copy(PathGroup src, PathGroup dst, 158 TransformHandler handler, boolean move) throws IOException { 159 List<Map.Entry<Path, Path>> copyItems = new ArrayList<>(); 160 List<Path> excludeItems = new ArrayList<>(); 161 162 for (var id: src.entries.keySet()) { 163 Path srcPath = src.entries.get(id); 164 if (dst.entries.containsKey(id)) { 165 copyItems.add(Map.entry(srcPath, dst.entries.get(id))); 166 } else { 167 excludeItems.add(srcPath); 168 } 169 } 170 171 copy(move, copyItems, excludeItems, handler); 172 } 173 copy(boolean move, List<Map.Entry<Path, Path>> entries, List<Path> excludePaths, TransformHandler handler)174 private static void copy(boolean move, List<Map.Entry<Path, Path>> entries, 175 List<Path> excludePaths, TransformHandler handler) throws 176 IOException { 177 178 if (handler == null) { 179 handler = new TransformHandler() { 180 @Override 181 public void copyFile(Path src, Path dst) throws IOException { 182 Files.createDirectories(IOUtils.getParent(dst)); 183 if (move) { 184 Files.move(src, dst); 185 } else { 186 Files.copy(src, dst); 187 } 188 } 189 190 @Override 191 public void createDirectory(Path dir) throws IOException { 192 Files.createDirectories(dir); 193 } 194 }; 195 } 196 197 // destination -> source file mapping 198 Map<Path, Path> actions = new HashMap<>(); 199 for (var action: entries) { 200 Path src = action.getKey(); 201 Path dst = action.getValue(); 202 if (Files.isDirectory(src)) { 203 try (Stream<Path> stream = Files.walk(src)) { 204 stream.sequential().forEach(path -> actions.put(dst.resolve( 205 src.relativize(path)).normalize(), path)); 206 } 207 } else { 208 actions.put(dst.normalize(), src); 209 } 210 } 211 212 for (var action : actions.entrySet()) { 213 Path dst = action.getKey(); 214 Path src = action.getValue(); 215 216 if (excludePaths.stream().anyMatch(src::startsWith)) { 217 continue; 218 } 219 220 if (src.equals(dst) || !src.toFile().exists()) { 221 continue; 222 } 223 224 if (Files.isDirectory(src)) { 225 handler.createDirectory(dst); 226 } else { 227 handler.copyFile(src, dst); 228 } 229 } 230 231 if (move) { 232 // Delete source dirs. 233 for (var entry: entries) { 234 Path srcFile = entry.getKey(); 235 if (Files.isDirectory(srcFile)) { 236 IOUtils.deleteRecursive(srcFile); 237 } 238 } 239 } 240 } 241 normalizedPath(Path v)242 private static Map.Entry<Path, Path> normalizedPath(Path v) { 243 final Path normalized; 244 if (!v.isAbsolute()) { 245 normalized = Path.of("./").resolve(v.normalize()); 246 } else { 247 normalized = v.normalize(); 248 } 249 250 return Map.entry(normalized, v); 251 } 252 normalizedPaths()253 private List<Map.Entry<Path, Path>> normalizedPaths() { 254 return entries.values().stream().map(PathGroup::normalizedPath).collect( 255 Collectors.toList()); 256 } 257 258 private final Map<Object, Path> entries; 259 } 260