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