/**
* 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.hadoop.hive.common;
/**
* Collection of Java class loading/reflection related utilities common across
* Hive.
*/
public final class JavaUtils {
/**
* Standard way of getting classloader in Hive code (outside of Hadoop).
*
* Uses the context loader to get access to classpaths to auxiliary and jars
* added with 'add jar' command. Falls back to current classloader.
*
* In Hadoop-related code, we use Configuration.getClassLoader().
*/
public static ClassLoader getClassLoader() {
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
if (classLoader == null) {
classLoader = JavaUtils.class.getClassLoader();
}
return classLoader;
}
private JavaUtils() {
// prevent instantiation
}
}