Alan Bateman 99f3285106 8003255: (profiles) Update JAR file specification to support profiles
Reviewed-by: dholmes, mchung, ksrini
2013-01-21 23:20:42 -05:00

96 lines
3.6 KiB
Java

/*
* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
import java.net.*;
import java.io.File;
import java.util.jar.*;
/**
* Attempts to load classes or resources from a JAR file. The load should succeed
* if the runtime supports the profile indicated by the Profile attribute, fail
* with UnsupportedProfileException otherwise.
*/
public class Basic {
static int indexOf(String profile) {
if (profile == null || "compact1".equals(profile)) return 1;
if ("compact2".equals(profile)) return 2;
if ("compact3".equals(profile)) return 3;
if ("".equals(profile)) return 4;
return Integer.MAX_VALUE; // unknown profile name
}
public static void main(String[] args) throws Exception {
if (args.length < 2)
throw new RuntimeException("Usage: java <jarfile> <classname>");
String jar = args[0];
String cn = args[1];
File lib = new File(jar);
URL url = lib.toURI().toURL();
URL urls[] = { url };
// ## replace this if there is a standard way to determine the profile
String thisProfile = sun.misc.Version.profileName();
String jarProfile = null;
try (JarFile jf = new JarFile(lib)) {
Manifest manifest = jf.getManifest();
if (manifest != null) {
Attributes mainAttrs = manifest.getMainAttributes();
if (mainAttrs != null) {
jarProfile = mainAttrs.getValue(Attributes.Name.PROFILE);
}
}
}
boolean shouldFail = indexOf(thisProfile) < indexOf(jarProfile);
try (URLClassLoader cl = new URLClassLoader(urls)) {
System.out.format("Loading %s from %s ...%n", cn, jar);
Class<?> c = Class.forName(cn, true, cl);
System.out.println(c);
if (shouldFail)
throw new RuntimeException("UnsupportedProfileException expected");
} catch (UnsupportedProfileException x) {
if (!shouldFail)
throw x;
System.out.println("UnsupportedProfileException thrown as expected");
}
try (URLClassLoader cl = new URLClassLoader(urls)) {
System.out.format("Loading resource from %s ...%n", jar);
URL r = cl.findResource("META-INF/MANIFEST.MF");
System.out.println(r);
if (shouldFail)
throw new RuntimeException("UnsupportedProfileException expected");
} catch (UnsupportedProfileException x) {
if (!shouldFail)
throw x;
System.out.println("UnsupportedProfileException thrown as expected");
}
}
}