/**
* Utility function to extract information about files on the user's file systems.
*
* @param context current call Context
* @param paths the list of files for which to return information
* @return list column-oriented table of file information
* @throws FileSystemException
*/
@Internal("file.info")
public static ListVector fileInfo(@Current Context context, StringVector paths)
throws FileSystemException {
DoubleArrayVector.Builder size = new DoubleArrayVector.Builder();
LogicalArrayVector.Builder isdir = new LogicalArrayVector.Builder();
IntArrayVector.Builder mode =
(IntArrayVector.Builder)
new IntArrayVector.Builder()
.setAttribute(Symbols.CLASS, StringVector.valueOf("octmode"));
DoubleArrayVector.Builder mtime = new DoubleArrayVector.Builder();
StringVector.Builder exe = new StringVector.Builder();
for (String path : paths) {
if (StringVector.isNA(path)) {
throw new EvalException("invalid filename argument");
}
FileObject file = context.resolveFile(path);
if (file.exists()) {
if (file.getType() == FileType.FILE) {
size.add((int) file.getContent().getSize());
} else {
size.add(0);
}
isdir.add(file.getType() == FileType.FOLDER);
mode.add(mode(file));
try {
mtime.add(file.getContent().getLastModifiedTime());
} catch (Exception e) {
mtime.add(0);
}
exe.add(file.getName().getBaseName().endsWith(".exe") ? "yes" : "no");
} else {
size.addNA();
isdir.addNA();
mode.addNA();
mtime.addNA();
exe.addNA();
}
}
return ListVector.newNamedBuilder()
.add("size", size)
.add("isdir", isdir)
.add("mode", mode)
.add("mtime", mtime)
.add("ctime", mtime)
.add("atime", mtime)
.add("exe", exe)
.build();
}
/**
* Unlink deletes the file(s) or directories specified by {@code paths}.
*
* @param context the current call Context
* @param paths list of paths to delete
* @param recursive Should directories be deleted recursively?
* @return 0 for success, 1 for failure. Not deleting a non-existent file is not a failure, nor is
* being unable to delete a directory if recursive = FALSE. However, missing values in x are
* regarded as failures.
* @throws FileSystemException
*/
@Internal
public static IntVector unlink(
@Current Context context, StringVector paths, boolean recursive, boolean force)
throws FileSystemException {
IntArrayVector.Builder result = new IntArrayVector.Builder();
for (String path : paths) {
if (StringVector.isNA(path)) {
result.add(0);
} else {
FileObject file = context.resolveFile(path);
delete(file, recursive);
result.add(1);
}
}
return result.build();
}