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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 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.ql.processors;
import static org.apache.commons.lang.StringUtils.isBlank;
public final class CommandProcessorFactory {
  private CommandProcessorFactory() {
    // prevent instantiation
  static Map<HiveConfDrivermapDrivers = new HashMap<HiveConfDriver>();
  public static CommandProcessor get(String cmd) {
    return get(cmdnull);
  public static CommandProcessor get(String cmdHiveConf conf) {
    String cmdl = cmd.toLowerCase();
    if ("set".equals(cmdl)) {
      return new SetProcessor();
    } else if ("dfs".equals(cmdl)) {
      SessionState ss = SessionState.get();
      return new DfsProcessor(ss.getConf());
    } else if ("add".equals(cmdl)) {
      return new AddResourceProcessor();
    } else if ("delete".equals(cmdl)) {
      return new DeleteResourceProcessor();
    } else if (!isBlank(cmd)) {
      if (conf == null) {
        return new Driver();
      Driver drv = .get(conf);
      if (drv == null) {
        drv = new Driver();
      return drv;
    return null;
  public static void clean(HiveConf conf) {
    Driver drv = .get(conf);
    if (drv != null) {
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