private static void delete(FileObject file, boolean recursive) throws FileSystemException {
if (file.exists()) {
if (file.getType() == FileType.FILE) {
file.delete();
} else if (file.getType() == FileType.FOLDER) {
if (file.getChildren().length == 0) {
file.delete();
} else if (recursive) {
file.delete();
}
}
}
}
/**
* 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();
}
@Invisible
@Internal
public static String setwd(@Current Context context, String workingDirectoryName)
throws FileSystemException {
FileObject newWorkingDirectory = context.resolveFile(workingDirectoryName);
if (!newWorkingDirectory.exists() || newWorkingDirectory.getType() != FileType.FOLDER) {
throw new EvalException("cannot change working directory");
}
String previous = context.getSession().getWorkingDirectory().getName().getURI();
context.getSession().setWorkingDirectory(newWorkingDirectory);
return previous;
}
/**
* Gets the type or storage mode of an object.
*
* @return unix-style file mode integer
*/
private static int mode(FileObject file) throws FileSystemException {
int access = 0;
if (file.isReadable()) {
access += 4;
}
if (file.isWriteable()) {
access += 2;
}
if (file.getType() == FileType.FOLDER) {
access += 1;
}
// i know this is braindead but i can't be bothered
// to do octal math at the moment
String digit = Integer.toString(access);
String octalString = digit + digit + digit;
return Integer.parseInt(octalString, 8);
}
