| /* |
| * 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 jdk.internal.loader; |
| |
| import jdk.internal.module.Checks; |
| |
| /** |
| * Helper class for Class#getResource, Module#getResourceAsStream, and other |
| * methods that locate a resource in a module. |
| */ |
| public final class ResourceHelper { |
| private ResourceHelper() { } |
| |
| /** |
| * Returns the <em>package name</em> for a resource. |
| */ |
| public static String getPackageName(String name) { |
| int index = name.lastIndexOf('/'); |
| if (index != -1) { |
| return name.substring(0, index).replace("/", "."); |
| } else { |
| return ""; |
| } |
| } |
| |
| /** |
| * Returns true if the resource is a <em>simple resource</em> that can |
| * never be encapsulated. Resources ending in "{@code .class}" or where |
| * the package name is not a Java identifier are resources that can |
| * never be encapsulated. |
| */ |
| public static boolean isSimpleResource(String name) { |
| int len = name.length(); |
| if (len > 6 && name.endsWith(".class")) { |
| return true; |
| } |
| if (!Checks.isJavaIdentifier(getPackageName(name))) { |
| return true; |
| } |
| return false; |
| } |
| } |