1/* 2 * Copyright (c) 2015, 2016, 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.lang.module.Configuration; 25import java.lang.module.ResolvedModule; 26import java.io.IOException; 27import java.io.InputStream; 28import java.net.URL; 29import java.nio.file.Files; 30import java.nio.file.Path; 31import java.nio.file.Paths; 32 33/** 34 * Basic test of Class getResource and getResourceAsStream to locate/read 35 * resources in named modules. 36 */ 37 38public class Main { 39 40 static final String NAME = "myresource"; 41 42 public static void main(String[] args) throws IOException { 43 44 // create resources in m1 45 createResource("m1", Paths.get("."), "m1"); 46 createResource("m1", Paths.get("p1"), "m1/p1"); 47 createResource("m1", Paths.get("p1", "impl"), "m1/p1.impl"); 48 createResource("m1", Paths.get("p1", "resources"), "m1/p1.resources"); 49 50 // create resources in m2 51 createResource("m2", Paths.get("."), "m2"); 52 createResource("m2", Paths.get("p2"), "m2/p2"); 53 createResource("m2", Paths.get("p2", "impl"), "m2/p2.impl"); 54 createResource("m2", Paths.get("p2", "resources"), "m2/p2.resources"); 55 56 57 // invoke Class getResource from an unnamed module. 58 URL url = Main.class.getResource("/" + NAME); 59 assertNotNull(url); 60 61 url = Main.class.getResource("/p1/" + NAME); 62 assertNull(url); 63 64 url = Main.class.getResource("/p1/impl/" + NAME); 65 assertNull(url); 66 67 url = Main.class.getResource("/p1/resources/" + NAME); 68 assertEquals(readAllAsString(url), "m1/p1.resources"); 69 70 url = Main.class.getResource("/p2/" + NAME); 71 assertNull(url); 72 73 url = Main.class.getResource("/p2/impl/" + NAME); 74 assertNull(url); 75 76 // m1: exports private p1.resources 77 url = Main.class.getResource("/p2/resources/" + NAME); 78 assertNull(url); 79 80 81 // invoke Class getResource from module m1 82 url = p1.Main.getResource("/" + NAME); 83 assertEquals(readAllAsString(url), "m1"); 84 85 url = p1.Main.getResource("/p1/" + NAME); 86 assertEquals(readAllAsString(url), "m1/p1"); 87 88 url = p1.Main.getResource("/p1/impl/" + NAME); 89 assertEquals(readAllAsString(url), "m1/p1.impl"); 90 91 url = p1.Main.getResource("/p1/resources/" + NAME); 92 assertEquals(readAllAsString(url), "m1/p1.resources"); 93 94 // m2: not a named package 95 url = p1.Main.getResource(p2.Main.class, "/" + NAME); 96 assertEquals(readAllAsString(url), "m2"); 97 98 url = p1.Main.getResource(p2.Main.class, "/p2/" + NAME); 99 assertNull(url); 100 101 // m2: exports p2.impl to m1 102 url = p1.Main.getResource(p2.Main.class, "/p2/impl/" + NAME); 103 assertNull(url); 104 105 // m2: exports private p2.resources to m1; 106 url = p1.Main.getResource(p2.Main.class, "/p2/resources/" + NAME); 107 assertEquals(readAllAsString(url), "m2/p2.resources"); 108 109 110 // invoke Class getResource from module m2 111 url = p2.Main.getResource("/" + NAME); 112 assertEquals(readAllAsString(url), "m2"); 113 114 url = p2.Main.getResource("/p2/" + NAME); 115 assertEquals(readAllAsString(url), "m2/p2"); 116 117 url = p2.Main.getResource("/p2/impl/" + NAME); 118 assertEquals(readAllAsString(url), "m2/p2.impl"); 119 120 url = p2.Main.getResource("/p2/resources/" + NAME); 121 assertEquals(readAllAsString(url), "m2/p2.resources"); 122 123 // m1: not a named package 124 url = p2.Main.getResource(p1.Main.class, "/" + NAME); 125 assertEquals(readAllAsString(url), "m1"); 126 127 url = p2.Main.getResource(p1.Main.class, "/p1/" + NAME); 128 assertNull(url); 129 130 url = p2.Main.getResource(p1.Main.class, "/p1/impl/" + NAME); 131 assertNull(url); 132 133 // m1: exports private p1.resources; 134 url = p2.Main.getResource(p1.Main.class, "/p1/resources/" + NAME); 135 assertEquals(readAllAsString(url), "m1/p1.resources"); 136 137 138 // invoke Class getResourceAsStream from an unnamed module. 139 InputStream in = Main.class.getResourceAsStream("/" + NAME); 140 assertNotNull(in); 141 142 in = Main.class.getResourceAsStream("/p1/" + NAME); 143 assertNull(in); 144 145 in = Main.class.getResourceAsStream("/p1/impl/" + NAME); 146 assertNull(in); 147 148 in = Main.class.getResourceAsStream("/p1/resources/" + NAME); 149 assertEquals(readAllAsString(in), "m1/p1.resources"); 150 151 in = Main.class.getResourceAsStream("/p2/" + NAME); 152 assertNull(in); 153 154 in = Main.class.getResourceAsStream("/p2/impl/" + NAME); 155 assertNull(in); 156 157 in = Main.class.getResourceAsStream("/p2/resources/" + NAME); 158 assertNull(in); 159 160 161 // invoke Class getResourceAsStream from module m1 162 in = p1.Main.getResourceAsStream("/" + NAME); 163 assertEquals(readAllAsString(in), "m1"); 164 165 in = p1.Main.getResourceAsStream("/p1/" + NAME); 166 assertEquals(readAllAsString(in), "m1/p1"); 167 168 in = p1.Main.getResourceAsStream("/p1/impl/" + NAME); 169 assertEquals(readAllAsString(in), "m1/p1.impl"); 170 171 in = p1.Main.getResourceAsStream("/p1/resources/" + NAME); 172 assertEquals(readAllAsString(in), "m1/p1.resources"); 173 174 in = p1.Main.getResourceAsStream(p2.Main.class, "/" + NAME); 175 assertEquals(readAllAsString(in), "m2"); 176 177 in = p1.Main.getResourceAsStream(p2.Main.class, "/p2/" + NAME); 178 assertNull(in); 179 180 in = p1.Main.getResourceAsStream(p2.Main.class, "/p2/impl/" + NAME); 181 assertNull(in); 182 183 in = p1.Main.getResourceAsStream(p2.Main.class, "/p2/resources/" + NAME); 184 assertEquals(readAllAsString(in), "m2/p2.resources"); 185 186 187 // invoke Class getResourceAsStream from module m2 188 in = p2.Main.getResourceAsStream("/" + NAME); 189 assertEquals(readAllAsString(in), "m2"); 190 191 in = p2.Main.getResourceAsStream("/p2/" + NAME); 192 assertEquals(readAllAsString(in), "m2/p2"); 193 194 in = p2.Main.getResourceAsStream("/p2/impl/" + NAME); 195 assertEquals(readAllAsString(in), "m2/p2.impl"); 196 197 in = p2.Main.getResourceAsStream("/p2/resources/" + NAME); 198 assertEquals(readAllAsString(in), "m2/p2.resources"); 199 200 in = p2.Main.getResourceAsStream(p1.Main.class, "/" + NAME); 201 assertEquals(readAllAsString(in), "m1"); 202 203 in = p2.Main.getResourceAsStream(p1.Main.class, "/p1/" + NAME); 204 assertNull(in); 205 206 in = p2.Main.getResourceAsStream(p1.Main.class, "/p1/impl/" + NAME); 207 assertNull(in); 208 209 in = p2.Main.getResourceAsStream(p1.Main.class, "/p1/resources/" + NAME); 210 assertEquals(readAllAsString(in), "m1/p1.resources"); 211 212 213 // Nulls 214 try { 215 Main.class.getResource(null); 216 assertTrue(false); 217 } catch (NullPointerException expected) { } 218 try { 219 Main.class.getResourceAsStream(null); 220 assertTrue(false); 221 } catch (NullPointerException expected) { } 222 try { 223 p1.Main.class.getResource(null); 224 assertTrue(false); 225 } catch (NullPointerException expected) { } 226 try { 227 p1.Main.class.getResourceAsStream(null); 228 assertTrue(false); 229 } catch (NullPointerException expected) { } 230 231 // SecurityManager case 232 System.setSecurityManager(new SecurityManager()); 233 234 assertNull(Main.class.getResource("/" + NAME)); 235 assertNull(p1.Main.getResource("/" + NAME)); 236 assertNull(p2.Main.getResource("/" + NAME)); 237 238 assertNull(Main.class.getResourceAsStream("/" + NAME)); 239 assertNull(p1.Main.getResourceAsStream("/" + NAME)); 240 assertNull(p2.Main.getResourceAsStream("/" + NAME)); 241 242 System.out.println("Success!"); 243 } 244 245 /** 246 * Create a resource in the sub-directory of the given exploded module 247 */ 248 static void createResource(String mn, Path subdir, String msg) throws IOException { 249 Path dir = directoryFor(mn).resolve(subdir); 250 Path file = dir.resolve(NAME); 251 Files.write(file, msg.getBytes("UTF-8")); 252 } 253 254 /** 255 * Returns the directory for the given module (by name). 256 */ 257 static Path directoryFor(String name) { 258 Configuration cf = ModuleLayer.boot().configuration(); 259 ResolvedModule resolvedModule = cf.findModule(name).orElse(null); 260 if (resolvedModule == null) 261 throw new RuntimeException("not found: " + name); 262 Path dir = Paths.get(resolvedModule.reference().location().get()); 263 if (!Files.isDirectory(dir)) 264 throw new RuntimeException("not a directory: " + dir); 265 return dir; 266 } 267 268 static String readAllAsString(InputStream in) throws IOException { 269 if (in == null) 270 return null; 271 try (in) { 272 return new String(in.readAllBytes(), "UTF-8"); 273 } 274 } 275 276 static String readAllAsString(URL url) throws IOException { 277 if (url == null) 278 return null; 279 InputStream in = url.openStream(); 280 return readAllAsString(url.openStream()); 281 } 282 283 static void assertTrue(boolean condition) { 284 if (!condition) throw new RuntimeException(); 285 } 286 287 static void assertNull(Object o) { 288 assertTrue(o == null); 289 } 290 291 static void assertNotNull(Object o) { 292 assertTrue(o != null); 293 } 294 295 static void assertEquals(Object actual, Object expected) { 296 if (expected == null) { 297 assertNull(actual); 298 } else { 299 assertTrue(expected.equals(actual)); 300 } 301 } 302 303 static void assertNotEquals(Object actual, Object expected) { 304 if (expected == null) { 305 assertNotNull(actual); 306 } else { 307 assertTrue(!expected.equals(actual)); 308 } 309 } 310} 311 312