1/* 2 * Copyright (c) 2004, 2011, 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 26package sun.security.tools; 27 28import java.io.File; 29import java.io.IOException; 30import java.lang.String; 31import java.util.StringTokenizer; 32import java.net.URL; 33import java.net.URLClassLoader; 34import java.net.MalformedURLException; 35 36/** 37 * A utility class for handle path list 38 * 39 */ 40public class PathList { 41 /** 42 * Utility method for appending path from pathFrom to pathTo. 43 * 44 * @param pathTo the target path 45 * @param pathFrom the path to be appended to pathTo 46 * @return the resulting path 47 */ 48 public static String appendPath(String pathTo, String pathFrom) { 49 if (pathTo == null || pathTo.length() == 0) { 50 return pathFrom; 51 } else if (pathFrom == null || pathFrom.length() == 0) { 52 return pathTo; 53 } else { 54 return pathTo + File.pathSeparator + pathFrom; 55 } 56 } 57 58 /** 59 * Utility method for converting a search path string to an array 60 * of directory and JAR file URLs. 61 * 62 * @param path the search path string 63 * @return the resulting array of directory and JAR file URLs 64 */ 65 public static URL[] pathToURLs(String path) { 66 StringTokenizer st = new StringTokenizer(path, File.pathSeparator); 67 URL[] urls = new URL[st.countTokens()]; 68 int count = 0; 69 while (st.hasMoreTokens()) { 70 URL url = fileToURL(new File(st.nextToken())); 71 if (url != null) { 72 urls[count++] = url; 73 } 74 } 75 if (urls.length != count) { 76 URL[] tmp = new URL[count]; 77 System.arraycopy(urls, 0, tmp, 0, count); 78 urls = tmp; 79 } 80 return urls; 81 } 82 83 /** 84 * Returns the directory or JAR file URL corresponding to the specified 85 * local file name. 86 * 87 * @param file the File object 88 * @return the resulting directory or JAR file URL, or null if unknown 89 */ 90 private static URL fileToURL(File file) { 91 String name; 92 try { 93 name = file.getCanonicalPath(); 94 } catch (IOException e) { 95 name = file.getAbsolutePath(); 96 } 97 name = name.replace(File.separatorChar, '/'); 98 if (!name.startsWith("/")) { 99 name = "/" + name; 100 } 101 // If the file does not exist, then assume that it's a directory 102 if (!file.isFile()) { 103 name = name + "/"; 104 } 105 try { 106 return new URL("file", "", name); 107 } catch (MalformedURLException e) { 108 throw new IllegalArgumentException("file"); 109 } 110 } 111} 112