/*
* Copyright (c) 2004, 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 sun.security.util;
import java.io.File;
import java.io.IOException;
import java.lang.String;
import java.util.StringTokenizer;
import java.net.URL;
import java.net.URLClassLoader;
import java.net.MalformedURLException;
/**
* A utility class for handle path list
*
*/
public class PathList {
/**
* Utility method for appending path from pathFrom to pathTo.
*
* @param pathTo the target path
* @param pathSource the path to be appended to pathTo
* @return the resulting path
*/
public static String appendPath(String pathTo, String pathFrom) {
if (pathTo == null || pathTo.length() == 0) {
return pathFrom;
} else if (pathFrom == null || pathFrom.length() == 0) {
return pathTo;
} else {
return pathTo + File.pathSeparator + pathFrom;
}
}
/**
* Utility method for converting a search path string to an array
* of directory and JAR file URLs.
*
* @param path the search path string
* @return the resulting array of directory and JAR file URLs
*/
public static URL[] pathToURLs(String path) {
StringTokenizer st = new StringTokenizer(path, File.pathSeparator);
URL[] urls = new URL[st.countTokens()];
int count = 0;
while (st.hasMoreTokens()) {
URL url = fileToURL(new File(st.nextToken()));
if (url != null) {
urls[count++] = url;
}
}
if (urls.length != count) {
URL[] tmp = new URL[count];
System.arraycopy(urls, 0, tmp, 0, count);
urls = tmp;
}
return urls;
}
/**
* Returns the directory or JAR file URL corresponding to the specified
* local file name.
*
* @param file the File object
* @return the resulting directory or JAR file URL, or null if unknown
*/
private static URL fileToURL(File file) {
String name;
try {
name = file.getCanonicalPath();
} catch (IOException e) {
name = file.getAbsolutePath();
}
name = name.replace(File.separatorChar, '/');
if (!name.startsWith("/")) {
name = "/" + name;
}
// If the file does not exist, then assume that it's a directory
if (!file.isFile()) {
name = name + "/";
}
try {
return new URL("file", "", name);
} catch (MalformedURLException e) {
throw new IllegalArgumentException("file");
}
}
}