/**
* 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();
}
@Internal
public static ListVector Version() {
// this is just copied from my local R installation
// we'll have to see later what makes the most sense to put here,
// whether we need to pretend to be some version of R
return ListVector.newNamedBuilder()
.add("platform", "i386-pc-mingw32")
.add("arch", "i386")
.add("os", "mingw32")
.add("system", "i386, mingw32")
.add("status", "")
.add("major", RVersion.MAJOR)
.add("minor", RVersion.MINOR)
.add("year", "2009")
.add("month", "12")
.add("day", "14")
.add("language", "R")
.add("svn rev", "50720")
.add(
"version.string", "R version " + RVersion.MAJOR + "." + RVersion.MINOR + "(2009-12-14)")
.build();
}