| // Copyright (C) 2023 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.gerrit.common; |
| |
| import com.google.common.collect.Sets; |
| import com.google.gerrit.launcher.GerritLauncher.GerritClassLoader; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.nio.file.Path; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Set; |
| |
| /** Provides util methods for dynamic loading jars */ |
| public final class JarUtil { |
| public static void loadJars(Collection<Path> jars) { |
| if (jars.isEmpty()) { |
| return; |
| } |
| |
| ClassLoader cl = JarUtil.class.getClassLoader(); |
| if (!(cl instanceof GerritClassLoader)) { |
| throw noAddURL("Not loaded by GerritClassLoader", null); |
| } |
| |
| @SuppressWarnings("resource") // Leave open so classes can be loaded. |
| GerritClassLoader gerritClassLoader = (GerritClassLoader) cl; |
| |
| Set<URL> have = Sets.newHashSet(Arrays.asList(gerritClassLoader.getURLs())); |
| for (Path path : jars) { |
| try { |
| URL url = path.toUri().toURL(); |
| if (have.add(url)) { |
| gerritClassLoader.addURL(url); |
| } |
| } catch (MalformedURLException | IllegalArgumentException e) { |
| throw noAddURL("addURL " + path + " failed", e); |
| } |
| } |
| } |
| |
| public static void loadJars(Path jar) { |
| loadJars(Collections.singleton(jar)); |
| } |
| |
| private static UnsupportedOperationException noAddURL(String m, Throwable why) { |
| String prefix = "Cannot extend classpath: "; |
| return new UnsupportedOperationException(prefix + m, why); |
| } |
| |
| private JarUtil() {} |
| } |