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annotate jvmci/jdk.vm.ci.services/src/jdk/vm/ci/services/JVMCIClassLoaderFactory.java @ 22761:f2206f5bb62e

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removed @ServiceProvider mechanism (GRAAL-1380)
author Doug Simon <doug.simon@oracle.com>
date Wed, 30 Dec 2015 17:55:07 +0100
parents jvmci/jdk.vm.ci.service/src/jdk/vm/ci/service/JVMCIClassLoaderFactory.java@1bbd4a7c274b
children f84a5ac3be22
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1 /*
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package jdk.vm.ci.services;
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24
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25 import java.io.File;
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26 import java.net.MalformedURLException;
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27 import java.net.URL;
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28 import java.net.URLClassLoader;
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29 import java.util.ArrayList;
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30 import java.util.List;
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31
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32 /**
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33 * Utility called from the VM to create and register a separate class loader for loading JVMCI
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34 * classes (i.e., those in found in lib/jvmci/*.jar).
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35 */
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36 class JVMCIClassLoaderFactory {
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37
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38 /**
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39 * Copy of the {@code UseJVMCIClassLoader} VM option. Set by the VM before the static
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40 * initializer is called.
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41 */
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42 private static boolean useJVMCIClassLoader;
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43
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44 /**
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45 * Registers the JVMCI class loader in the VM.
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46 */
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47 private static native void init(ClassLoader loader);
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48
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49 static {
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50 init(useJVMCIClassLoader ? newClassLoader() : null);
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51 }
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52
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53 /**
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54 * Creates a new class loader for loading JVMCI classes.
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55 */
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56 private static ClassLoader newClassLoader() {
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57 URL[] urls = getJVMCIJarsUrls();
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58 ClassLoader parent = null;
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59 return URLClassLoader.newInstance(urls, parent);
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60 }
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61
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62 /**
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63 * Gets the URLs for lib/jvmci/*.jar.
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64 */
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65 private static URL[] getJVMCIJarsUrls() {
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66 File javaHome = new File(System.getProperty("java.home"));
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67 File lib = new File(javaHome, "lib");
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68 File jvmci = new File(lib, "jvmci");
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69 if (!jvmci.exists()) {
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70 throw new InternalError(jvmci + " does not exist");
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71 }
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72
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73 List<URL> urls = new ArrayList<>();
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74 for (String fileName : jvmci.list()) {
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75 if (fileName.endsWith(".jar")) {
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76 File file = new File(jvmci, fileName);
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77 if (file.isDirectory()) {
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78 continue;
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79 }
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80 try {
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81 urls.add(file.toURI().toURL());
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82 } catch (MalformedURLException e) {
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83 throw new InternalError(e);
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84 }
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85 }
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86 }
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87
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88 return urls.toArray(new URL[urls.size()]);
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89 }
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90 }