1 /* 2 * Copyright (c) 2012, 2020, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.internal.loader; 27 28 import java.io.File; 29 import java.util.ArrayList; 30 31 class ClassLoaderHelper { 32 33 private ClassLoaderHelper() {} 34 35 /** 36 * Returns an alternate path name for the given file 37 * such that if the original pathname did not exist, then the 38 * file may be located at the alternate location. 39 * For most platforms, this behavior is not supported and returns null. 40 */ 41 static File mapAlternativeName(File lib) { 42 return null; 43 } 44 45 /** 46 * Parse a PATH env variable. 47 * 48 * Empty elements will be replaced by dot. 49 */ 50 static String[] parsePath(String ldPath) { 51 char ps = File.pathSeparatorChar; 52 ArrayList<String> paths = new ArrayList<>(); 53 int pathStart = 0; 54 int pathEnd; 55 while ((pathEnd = ldPath.indexOf(ps, pathStart)) >= 0) { 56 paths.add((pathStart < pathEnd) ? 57 ldPath.substring(pathStart, pathEnd) : "."); 58 pathStart = pathEnd + 1; 59 } 60 int ldLen = ldPath.length(); 61 paths.add((pathStart < ldLen) ? 62 ldPath.substring(pathStart, ldLen) : "."); 63 return paths.toArray(new String[paths.size()]); 64 } 65 }