1 /*
   2  * Copyright (c) 2012, 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 
  24 import java.net.*;
  25 import java.io.File;
  26 import java.util.jar.*;
  27 
  28 /**
  29  * Attempts to load classes or resources from a JAR file. The load should succeed
  30  * if the runtime supports the profile indicated by the Profile attribute, fail
  31  * with UnsupportedProfileException otherwise.
  32  */
  33 
  34 public class Basic {
  35 
  36     static int indexOf(String profile) {
  37         if (profile == null || "compact1".equals(profile)) return 1;
  38         if ("compact2".equals(profile)) return 2;
  39         if ("compact3".equals(profile)) return 3;
  40         if ("".equals(profile)) return 4;
  41         return Integer.MAX_VALUE;  // unknown profile name
  42     }
  43 
  44     public static void main(String[] args) throws Exception {
  45         if (args.length < 2)
  46             throw new RuntimeException("Usage: java <jarfile> <classname>");
  47         String jar = args[0];
  48         String cn = args[1];
  49 
  50         File lib = new File(jar);
  51         URL url = lib.toURI().toURL();
  52         URL urls[] = { url };
  53 
  54         // ## replace this if there is a standard way to determine the profile
  55         String thisProfile = sun.misc.Version.profileName();
  56 
  57         String jarProfile = null;
  58         try (JarFile jf = new JarFile(lib)) {
  59             Manifest manifest = jf.getManifest();
  60             if (manifest != null) {
  61                 Attributes mainAttrs = manifest.getMainAttributes();
  62                 if (mainAttrs != null) {
  63                     jarProfile = mainAttrs.getValue(Attributes.Name.PROFILE);
  64                 }
  65             }
  66         }
  67 
  68         boolean shouldFail = indexOf(thisProfile) < indexOf(jarProfile);
  69 
  70         try (URLClassLoader cl = new URLClassLoader(urls)) {
  71             System.out.format("Loading %s from %s ...%n", cn, jar);
  72             Class<?> c = Class.forName(cn, true, cl);
  73             System.out.println(c);
  74             if (shouldFail)
  75                 throw new RuntimeException("UnsupportedProfileException expected");
  76         } catch (UnsupportedProfileException x) {
  77             if (!shouldFail)
  78                 throw x;
  79             System.out.println("UnsupportedProfileException thrown as expected");
  80         }
  81 
  82         try (URLClassLoader cl = new URLClassLoader(urls)) {
  83             System.out.format("Loading resource from %s ...%n", jar);
  84             URL r = cl.findResource("META-INF/MANIFEST.MF");
  85             System.out.println(r);
  86             if (shouldFail)
  87                 throw new RuntimeException("UnsupportedProfileException expected");
  88         } catch (UnsupportedProfileException x) {
  89             if (!shouldFail)
  90                 throw x;
  91             System.out.println("UnsupportedProfileException thrown as expected");
  92         }
  93     }
  94 }
  95