content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.cli.bundler.command;
  
  import alluxio.cli.Command;
  import alluxio.cli.CommandUtils;
  import alluxio.client.file.FileSystemContext;
  import alluxio.exception.status.InvalidArgumentException;
  
  import org.apache.commons.cli.CommandLine;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.File;
  import java.io.IOException;
  import java.nio.file.Paths;
  
  /**
   * Abstraction of a command under CollectInfo.
   * */
  public abstract class AbstractCollectInfoCommand implements Command {
    private static final Logger LOG = LoggerFactory.getLogger(AbstractCollectInfoCommand.class);
  
    protected FileSystemContext mFsContext;
    protected String mWorkingDirPath;
  
    /**
     * Creates an instance of {@link AbstractCollectInfoCommand}.
     *
     * @param fsContext {@link FileSystemContext} the context to run in
     * */
    public AbstractCollectInfoCommand(FileSystemContext fsContext) {
      mFsContext = fsContext;
    }
  
    @Override
    public void validateArgs(CommandLine cl) throws InvalidArgumentException {
      CommandUtils.checkNumOfArgsEquals(this, cl, 1);
    }
  
    /**
     * Gets the directory that this command should output to.
     * Creates the directory if it does not exist.
     *
     * @param cl the parsed {@link CommandLine}
     * @return the directory path
     * */
    public String getWorkingDirectory(CommandLine cl) {
      String[] args = cl.getArgs();
      String baseDirPath = args[1];
      String workingDirPath =  Paths.get(baseDirPath, this.getCommandName()).toString();
      LOG.debug("Command {} works in {}", this.getCommandName(), workingDirPath);
      // mkdirs checks existence of the path
      File workingDir = new File(workingDirPath);
      if (!workingDir.exists()) {
  
        System.out.format("Creating working directory: %s%n", workingDirPath);
        workingDir.mkdirs();
      }
      return workingDirPath;
    }
  
    /**
     * Generates the output file for the command to write printouts to.
     *
     * @param workingDirPath the base directory this command should output to
     * @param fileName name of the output file
     * @return the output file
     * */
    public File generateOutputFile(String workingDirPath, String fileName) throws IOException {
      String outputFilePath = Paths.get(workingDirPath, fileName).toString();
      File outputFile = new File(outputFilePath);
      if (!outputFile.exists()) {
        outputFile.createNewFile();
      }
      return outputFile;
    }
  }
  