| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.sqoop.util; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.net.URLDecoder; |
| import java.util.Enumeration; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import com.cloudera.sqoop.manager.ConnManager; |
| |
| /** |
| * Utility class; returns the locations of various jars. |
| */ |
| public final class Jars { |
| |
| public static final Log LOG = LogFactory.getLog( |
| Jars.class.getName()); |
| |
| private Jars() { |
| } |
| |
| /** |
| * @return the path to the main Sqoop jar. |
| */ |
| public static String getSqoopJarPath() { |
| return getJarPathForClass(Jars.class); |
| } |
| |
| /** |
| * Return the jar file path that contains a particular class. |
| * Method mostly cloned from o.a.h.mapred.JobConf.findContainingJar(). |
| */ |
| public static String getJarPathForClass(Class<? extends Object> classObj) { |
| ClassLoader loader = classObj.getClassLoader(); |
| String classFile = classObj.getName().replaceAll("\\.", "/") + ".class"; |
| try { |
| for (Enumeration<URL> itr = loader.getResources(classFile); |
| itr.hasMoreElements();) { |
| URL url = (URL) itr.nextElement(); |
| if ("jar".equals(url.getProtocol())) { |
| String toReturn = url.getPath(); |
| if (toReturn.startsWith("file:")) { |
| toReturn = toReturn.substring("file:".length()); |
| } |
| // URLDecoder is a misnamed class, since it actually decodes |
| // x-www-form-urlencoded MIME type rather than actual |
| // URL encoding (which the file path has). Therefore it would |
| // decode +s to ' 's which is incorrect (spaces are actually |
| // either unencoded or encoded as "%20"). Replace +s first, so |
| // that they are kept sacred during the decoding process. |
| toReturn = toReturn.replaceAll("\\+", "%2B"); |
| toReturn = URLDecoder.decode(toReturn, "UTF-8"); |
| return toReturn.replaceAll("!.*$", ""); |
| } |
| } |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| return null; |
| } |
| |
| /** |
| * Return the path to the jar containing the JDBC driver |
| * for a ConnManager. |
| */ |
| public static String getDriverClassJar(ConnManager mgr) { |
| if (null == mgr) { |
| return null; |
| } |
| |
| String driverClassName = mgr.getDriverClass(); |
| if (null == driverClassName) { |
| return null; |
| } |
| |
| try { |
| Class<? extends Object> driverClass = Class.forName(driverClassName); |
| return getJarPathForClass(driverClass); |
| } catch (ClassNotFoundException cnfe) { |
| LOG.warn("No such class " + driverClassName + " available."); |
| return null; |
| } |
| } |
| |
| } |
| |