/*
 * 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.ozone.shell.token;

import java.io.IOException;
import org.apache.commons.lang3.StringUtils;
import org.apache.hadoop.security.UserGroupInformation;
import picocli.CommandLine;

/**
 * Option for token renewer.
 */
public class RenewerOption {

  @CommandLine.Option(names = {"--renewer", "-r"},
      description = "Token renewer",
      showDefaultValue = CommandLine.Help.Visibility.ALWAYS)
  private String renewer;

  public String getValue() throws IOException {
    if (StringUtils.isEmpty(renewer)) {
      renewer = UserGroupInformation.getCurrentUser().getShortUserName();
    }
    return renewer;
  }
}
