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.shell;
  
  import alluxio.util.ShellUtils;
  
  import javax.annotation.concurrent.NotThreadSafe;
  
  /**
   * Object representation of a remote scp command.
   * The scp command copies a file/dir from remote host to local.
   */
  @NotThreadSafe
  public class ScpCommand extends ShellCommand {
    private final String mHostName;
  
    /**
     * Creates a remote scp command to copy a file to local.
     *
     * @param remoteHost remote hostname
     * @param fromFile the remote file
     * @param toFile target location to copy to
     */
    public ScpCommand(String remoteHost, String fromFile, String toFile) {
      this(remoteHost, fromFile, toFile, false);
    }
  
    /**
     * Creates a remote scp command to copy a file/dir to local.
     *
     * @param remoteHost the remote hostname
     * @param fromFile the remote file/dir to copy
     * @param toFile target path to copy to
     * @param isDir if true, the remote file is a directory
     */
    public ScpCommand(String remoteHost, String fromFile, String toFile, boolean isDir) {
      super(new String[]{"bash", "-c",
              String.format(isDir ? "scp -r %s %s:%s %s" : "scp %s %s:%s %s",
                      ShellUtils.COMMON_SSH_OPTS, remoteHost, fromFile, toFile)
      });
      mHostName = remoteHost;
    }
  
    /**
     * Returns the remote target hostname.
     *
     * @return target hostname
     */
    public String getHostName() {
      return mHostName;
    }
  }
  