Java Code Examples for org.apache.hadoop.hdfs.util.ReadOnlyList#isEmpty()

The following examples show how to use org.apache.hadoop.hdfs.util.ReadOnlyList#isEmpty() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: FSPermissionChecker.java    From hadoop with Apache License 2.0 6 votes vote down vote up 
/** Guarded by {@link FSNamesystem#readLock()} */
private void checkSubAccess(byte[][] pathByNameArr, int pathIdx, INode inode,
    int snapshotId, FsAction access, boolean ignoreEmptyDir)
    throws AccessControlException {
  if (inode == null || !inode.isDirectory()) {
    return;
  }

  Stack<INodeDirectory> directories = new Stack<INodeDirectory>();
  for(directories.push(inode.asDirectory()); !directories.isEmpty(); ) {
    INodeDirectory d = directories.pop();
    ReadOnlyList<INode> cList = d.getChildrenList(snapshotId);
    if (!(cList.isEmpty() && ignoreEmptyDir)) {
      //TODO have to figure this out with inodeattribute provider
      check(getINodeAttrs(pathByNameArr, pathIdx, d, snapshotId),
          inode.getFullPathName(), access);
    }

    for(INode child : cList) {
      if (child.isDirectory()) {
        directories.push(child.asDirectory());
      }
    }
  }
}
Example 2
Source File: FSPermissionChecker.java    From big-c with Apache License 2.0 6 votes vote down vote up 
/** Guarded by {@link FSNamesystem#readLock()} */
private void checkSubAccess(byte[][] pathByNameArr, int pathIdx, INode inode,
    int snapshotId, FsAction access, boolean ignoreEmptyDir)
    throws AccessControlException {
  if (inode == null || !inode.isDirectory()) {
    return;
  }

  Stack<INodeDirectory> directories = new Stack<INodeDirectory>();
  for(directories.push(inode.asDirectory()); !directories.isEmpty(); ) {
    INodeDirectory d = directories.pop();
    ReadOnlyList<INode> cList = d.getChildrenList(snapshotId);
    if (!(cList.isEmpty() && ignoreEmptyDir)) {
      //TODO have to figure this out with inodeattribute provider
      check(getINodeAttrs(pathByNameArr, pathIdx, d, snapshotId),
          inode.getFullPathName(), access);
    }

    for(INode child : cList) {
      if (child.isDirectory()) {
        directories.push(child.asDirectory());
      }
    }
  }
}
Example 3
Source File: FSDirRenameOp.java    From hadoop with Apache License 2.0 5 votes vote down vote up 
private static void validateOverwrite(
    String src, String dst, boolean overwrite, INode srcInode, INode dstInode)
    throws IOException {
  String error;// It's OK to rename a file to a symlink and vice versa
  if (dstInode.isDirectory() != srcInode.isDirectory()) {
    error = "Source " + src + " and destination " + dst
        + " must both be directories";
    NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
        + error);
    throw new IOException(error);
  }
  if (!overwrite) { // If destination exists, overwrite flag must be true
    error = "rename destination " + dst + " already exists";
    NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
        + error);
    throw new FileAlreadyExistsException(error);
  }
  if (dstInode.isDirectory()) {
    final ReadOnlyList<INode> children = dstInode.asDirectory()
        .getChildrenList(Snapshot.CURRENT_STATE_ID);
    if (!children.isEmpty()) {
      error = "rename destination directory is not empty: " + dst;
      NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
          + error);
      throw new IOException(error);
    }
  }
}
Example 4
Source File: FSDirRenameOp.java    From big-c with Apache License 2.0 5 votes vote down vote up 
private static void validateOverwrite(
    String src, String dst, boolean overwrite, INode srcInode, INode dstInode)
    throws IOException {
  String error;// It's OK to rename a file to a symlink and vice versa
  if (dstInode.isDirectory() != srcInode.isDirectory()) {
    error = "Source " + src + " and destination " + dst
        + " must both be directories";
    NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
        + error);
    throw new IOException(error);
  }
  if (!overwrite) { // If destination exists, overwrite flag must be true
    error = "rename destination " + dst + " already exists";
    NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
        + error);
    throw new FileAlreadyExistsException(error);
  }
  if (dstInode.isDirectory()) {
    final ReadOnlyList<INode> children = dstInode.asDirectory()
        .getChildrenList(Snapshot.CURRENT_STATE_ID);
    if (!children.isEmpty()) {
      error = "rename destination directory is not empty: " + dst;
      NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
          + error);
      throw new IOException(error);
    }
  }
}