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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
   *
   *     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.
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  package org.apache.cassandra.tools.nodetool;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.cassandra.tools.NodeProbe;
  import org.apache.cassandra.tools.nodetool.layout.CassandraUsage;
  import org.apache.cassandra.tools.nodetool.stats.DataPathsHolder;
  import org.apache.cassandra.tools.nodetool.stats.DataPathsPrinter;
  import org.apache.cassandra.tools.nodetool.stats.StatsPrinter;
  import picocli.CommandLine.Command;
  import picocli.CommandLine.Option;
  import picocli.CommandLine.Parameters;
  
  @Command(name = "datapaths", description = "Print all directories where data of tables are stored")
  public class DataPaths extends AbstractCommand
  {
      @CassandraUsage(usage = "[<keyspace.table>...]", description = "List of table (or keyspace) names")
      @Parameters(paramLabel = "keyspace.table", description = "List of table (or keyspace) names")
      private List<String> tableNames = new ArrayList<>();
  
      @Option(paramLabel = "format", names = { "-F", "--format" }, description = "Output format (json, yaml)")
      private String outputFormat = "";
  
      @Override
      protected void execute(NodeProbe probe)
      {
          if (!outputFormat.isEmpty() && !"json".equals(outputFormat) && !"yaml".equals(outputFormat))
          {
              throw new IllegalArgumentException("arguments for -F are yaml and json only.");
          }
  
          DataPathsHolder holder = new DataPathsHolder(probe, tableNames);
          StatsPrinter<DataPathsHolder> printer = DataPathsPrinter.from(outputFormat);
          printer.print(holder, probe.output().out);
      }
  }
  