| /* Copyright 2004 The Apache Software Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package tools.util; |
| |
| import java.io.BufferedReader; |
| import java.io.*; |
| import java.net.JarURLConnection; |
| import java.net.URL; |
| import java.util.jar.JarFile; |
| import java.util.jar.JarEntry; |
| |
| /** |
| * A utility class for getting data from jar files |
| */ |
| public class JarUtil { |
| |
| final static String EOL = System.getProperty("line.separator"); |
| |
| /** |
| * returns an File Object within the given jarFile as a String. jarFile must exist in classpath |
| * pre: jar containing resource is in the classpath |
| * |
| * @param pathToResource |
| * @return File |
| */ |
| public static File getResourceFromJarasFile(String pathToResource) |
| throws IOException { |
| |
| String[] tokens = pathToResource.split("/"); |
| String fileName = tokens[tokens.length - 1]; |
| tokens = fileName.split("\\."); |
| String extension= (tokens.length < 2) ? null:"." + tokens[1]; |
| String prefix= ( tokens[0].length()<3 ) ? tokens[0]+"abc":tokens[0]; |
| File temp = File.createTempFile(prefix,extension ); |
| temp.deleteOnExit(); |
| PrintWriter pr = null; |
| try { |
| pr = new PrintWriter(new FileWriter(temp)); |
| String content = getResourceFromJar(pathToResource); |
| pr.write(content); |
| } |
| finally { |
| if (pr != null) pr.close(); |
| } |
| return temp; |
| } |
| |
| |
| /** |
| * returns an item within the given jarFile as a String. jarFile must exist in classpath |
| * |
| * @param pathToResource |
| * @return String |
| */ |
| |
| public static String getResourceFromJar(String pathToResource) |
| throws IOException { |
| |
| URL url = ClassLoader.getSystemClassLoader().getResource( |
| pathToResource); |
| if (url == null) { |
| throw new FileNotFoundException( |
| "Resource: " + pathToResource + " was not found "); |
| } |
| JarURLConnection jarConnection = (JarURLConnection) url.openConnection(); |
| JarFile jar = jarConnection.getJarFile(); |
| if (jar.getJarEntry(pathToResource) == null) { |
| throw new FileNotFoundException( |
| "Resource: " + pathToResource + " was not found "); |
| } |
| |
| JarEntry item = jar.getJarEntry(pathToResource); |
| BufferedReader in = new BufferedReader( |
| new InputStreamReader(jar.getInputStream(item))); |
| |
| StringBuffer stb = new StringBuffer(); |
| String buffer; |
| |
| while (!((buffer = in.readLine()) == null)) { |
| stb.append(buffer + EOL); |
| } |
| return stb.toString(); |
| } |
| |
| /** |
| * returns an item within the given jarFile as a Stream |
| * |
| * @param pathToResource |
| * @return String |
| */ |
| |
| public static InputStream getResourceFromJarasStream(String pathToResource) |
| throws IOException { |
| InputStream resource=ClassLoader.getSystemClassLoader().getResourceAsStream( |
| pathToResource); |
| if ( resource==null ){ |
| throw new IOException(" Resource "+pathToResource+" was not found. " + |
| "Make sure Jar w/ resource is on classpath"); |
| } |
| return resource; |
| } |
| |
| /** |
| * Returns the classpath entry of a given item on the classpath. The item should be a jarFile reference |
| * |
| * @param jarFile |
| * @return String |
| * @throws FileNotFoundException |
| */ |
| |
| public static String getFilePath(String jarFile) |
| throws FileNotFoundException { |
| String sClassPath = System.getProperty("java.class.path"); |
| int jarIndex = sClassPath.indexOf(jarFile); |
| if (jarIndex <= 0) { |
| throw new FileNotFoundException( |
| "File: " + jarFile + " was not found on the classpath"); |
| } |
| |
| String P = File.pathSeparator; |
| String[] pathList = sClassPath.split(P); |
| for (int i = 0; i < pathList.length; i++) { |
| if (pathList[i].toLowerCase().endsWith(jarFile.toLowerCase())) { |
| return pathList[i]; |
| } |
| } |
| throw new FileNotFoundException( |
| "File: " + jarFile + " was not found when iterating classpath"); |
| } |
| } |
| |