| /* |
| * Copyright (c) 2016, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package java.lang; |
| |
| import java.lang.module.Configuration; |
| import java.lang.module.ModuleReference; |
| import java.net.URI; |
| |
| /** |
| * A NamedPackage represents a package by name in a specific module. |
| * |
| * A class loader will automatically create NamedPackage for each |
| * package when a class is defined. Package object is lazily |
| * defined until Class::getPackage, Package::getPackage(s), or |
| * ClassLoader::getDefinedPackage(s) method is called. |
| * |
| * NamedPackage allows ClassLoader to keep track of the runtime |
| * packages with minimal footprint and avoid constructing Package |
| * object. |
| */ |
| class NamedPackage { |
| private final String name; |
| private final Module module; |
| |
| NamedPackage(String pn, Module module) { |
| if (pn.isEmpty() && module.isNamed()) { |
| throw new InternalError("unnamed package in " + module); |
| } |
| this.name = pn.intern(); |
| this.module = module; |
| } |
| |
| /** |
| * Returns the name of this package. |
| */ |
| String packageName() { |
| return name; |
| } |
| |
| /** |
| * Returns the module of this named package. |
| */ |
| Module module() { |
| return module; |
| } |
| |
| /** |
| * Returns the location of the module if this named package is in |
| * a named module; otherwise, returns null. |
| */ |
| URI location() { |
| if (module.isNamed() && module.getLayer() != null) { |
| Configuration cf = module.getLayer().configuration(); |
| ModuleReference mref |
| = cf.findModule(module.getName()).get().reference(); |
| return mref.location().orElse(null); |
| } |
| return null; |
| } |
| |
| /** |
| * Creates a Package object of the given name and module. |
| */ |
| static Package toPackage(String name, Module module) { |
| return new Package(name, module); |
| } |
| } |