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.fs.command;
  
  import alluxio.AlluxioURI;
  import alluxio.annotation.PublicApi;
  import alluxio.cli.CommandUtils;
  import alluxio.client.file.FileSystemContext;
  import alluxio.exception.AlluxioException;
  import alluxio.exception.status.InvalidArgumentException;
  
  import org.apache.commons.cli.CommandLine;
  
  import java.io.IOException;
  import javax.annotation.concurrent.ThreadSafe;
  
  /**
   * Creates a 0 byte file specified by argv. The file will be written to UnderFileSystem.
   */
  @ThreadSafe
  @PublicApi
  public final class TouchCommand extends AbstractFileSystemCommand {
  
    /**
     * @param fsContext the filesystem of Alluxio
     */
    public TouchCommand(FileSystemContext fsContext) {
      super(fsContext);
    }
  
    @Override
    public String getCommandName() {
      return "touch";
    }
  
    @Override
    public void validateArgs(CommandLine cl) throws InvalidArgumentException {
      CommandUtils.checkNumOfArgsEquals(this, cl, 1);
    }
  
    @Override
    protected void runPlainPath(AlluxioURI inputPath, CommandLine cl)
        throws AlluxioException, IOException {
      mFileSystem.createFile(inputPath).close();
      System.out.println(inputPath + " has been created");
    }
  
    @Override
    public int run(CommandLine cl) throws AlluxioException, IOException {
      String[] args = cl.getArgs();
      AlluxioURI inputPath = new AlluxioURI(args[0]);
      runWildCardCmd(inputPath, cl);
      return 0;
    }
  
    @Override
    public String getUsage() {
      return "touch <path>";
    }
  
    @Override
    public String getDescription() {
      return "Creates a 0 byte file. The file will be written to the under file system.";
    }
  }
  