import org.apache.hadoop.fs.PathIsDirectoryException; //导入依赖的package包/类
@Override
protected void processPath(PathData item) throws IOException {
  if (item.stat.isDirectory() && !deleteDirs) {
    throw new PathIsDirectoryException(item.toString());
  }

  // TODO: if the user wants the trash to be used but there is any
  // problem (ie. creating the trash dir, moving the item to be deleted,
  // etc), then the path will just be deleted because moveToTrash returns
  // false and it falls thru to fs.delete.  this doesn't seem right
  if (moveToTrash(item) || !canBeSafelyDeleted(item)) {
    return;
  }
  if (!item.fs.delete(item.path, deleteDirs)) {
    throw new PathIOException(item.toString());
  }
  out.println("Deleted " + item);
}
 

import org.apache.hadoop.fs.PathIsDirectoryException; //导入依赖的package包/类
@Override
protected void processPath(PathData item) throws IOException {
  if(item.stat.isDirectory()) {
    throw new PathIsDirectoryException(item.toString());
  }
  long oldLength = item.stat.getLen();
  if(newLength > oldLength) {
    throw new IllegalArgumentException(
        "Cannot truncate to a larger file size. Current size: " + oldLength +
        ", truncate size: " + newLength + ".");
  }
  if(item.fs.truncate(item.path, newLength)) {
    out.println("Truncated " + item + " to length: " + newLength);
  }
  else if(waitOpt) {
    waitList.add(item);
  }
  else {
    out.println("Truncating " + item + " to length: " + newLength + ". " +
        "Wait for block recovery to complete before further updating this " +
        "file.");
  }
}
 

import org.apache.hadoop.fs.PathIsDirectoryException; //导入依赖的package包/类
@Override
protected void processPath(PathData item) throws IOException {
  if (item.stat.isDirectory()) {
    throw new PathIsDirectoryException(item.toString());
  }

  FileChecksum checksum = item.fs.getFileChecksum(item.path);
  if (checksum == null) {
    out.printf("%s\tNONE\t%n", item.toString());
  } else {
    String checksumString = StringUtils.byteToHexString(
        checksum.getBytes(), 0, checksum.getLength());
    out.printf("%s\t%s\t%s%n",
        item.toString(), checksum.getAlgorithmName(),
        checksumString);
  }
}
 

import org.apache.hadoop.fs.PathIsDirectoryException; //导入依赖的package包/类
@Override
protected void processOptions(LinkedList<String> args) throws IOException {
  try {
    CommandFormat cf = new CommandFormat(2, Integer.MAX_VALUE, "nl",
        "skip-empty-file");
    cf.parse(args);

    delimiter = cf.getOpt("nl") ? "\n" : null;
    skipEmptyFileDelimiter = cf.getOpt("skip-empty-file");

    dst = new PathData(new URI(args.removeLast()), getConf());
    if (dst.exists && dst.stat.isDirectory()) {
      throw new PathIsDirectoryException(dst.toString());
    }
    srcs = new LinkedList<PathData>();
  } catch (URISyntaxException e) {
    throw new IOException("unexpected URISyntaxException", e);
  }
}
 

import org.apache.hadoop.fs.PathIsDirectoryException; //导入依赖的package包/类
@Override
protected void processPath(PathData item) throws IOException {
  if (item.stat.isDirectory()) {
    throw new PathIsDirectoryException(item.toString());
  }

  long offset = dumpFromOffset(item, startingOffset);
  while (follow) {
    try {
      Thread.sleep(followDelay);
    } catch (InterruptedException e) {
      break;
    }
    offset = dumpFromOffset(item, offset);
  }
}
 

import org.apache.hadoop.fs.PathIsDirectoryException; //导入依赖的package包/类
@Override
protected void processPath(PathData item) throws IOException {
  if (item.stat.isDirectory() && !deleteDirs) {
    throw new PathIsDirectoryException(item.toString());
  }

  // TODO: if the user wants the trash to be used but there is any
  // problem (ie. creating the trash dir, moving the item to be deleted,
  // etc), then the path will just be deleted because moveToTrash returns
  // false and it falls thru to fs.delete.  this doesn't seem right
  if (moveToTrash(item)) {
    return;
  }
  if (!item.fs.delete(item.path, deleteDirs)) {
    throw new PathIOException(item.toString());
  }
  out.println("Deleted " + item);
}
 

import org.apache.hadoop.fs.PathIsDirectoryException; //导入依赖的package包/类
@Override
protected void processOptions(LinkedList<String> args) throws IOException {
  try {
    CommandFormat cf = new CommandFormat(2, Integer.MAX_VALUE, "nl");
    cf.parse(args);

    delimiter = cf.getOpt("nl") ? "\n" : null;

    dst = new PathData(new URI(args.removeLast()), getConf());
    if (dst.exists && dst.stat.isDirectory()) {
      throw new PathIsDirectoryException(dst.toString());
    }
    srcs = new LinkedList<PathData>();
  } catch (URISyntaxException e) {
    throw new IOException("unexpected URISyntaxException", e);
  }
}
 

import org.apache.hadoop.fs.PathIsDirectoryException; //导入依赖的package包/类
@Override
protected void processPath(PathData item) throws IOException {
  if (item.stat.isDirectory()) {
    throw new PathIsDirectoryException(item.toString());
  }

  FileChecksum checksum = item.fs.getFileChecksum(item.path);
  if (checksum == null) {
    out.printf("%s\tNONE\t\n", item.toString());
  } else {
    String checksumString = StringUtils.byteToHexString(
        checksum.getBytes(), 0, checksum.getLength());
    out.printf("%s\t%s\t%s\n",
        item.toString(), checksum.getAlgorithmName(),
        checksumString);
  }
}