/**
* Return the names of the contained items, if path leads to a Directory. Or, return the path
* provided, if it leads to a File.
*
* @param paths a list of Strings containing the desired paths.
* @return a String containing the relevant contents.
*/
public String ls(List<String> paths) throws Exception {
// If ls is called without parameters.
if (paths.isEmpty()) {
if (!currentOptions_.equals("R")) {
if (currentDirectory_.getSize() == 0) {
return "";
} else {
return currentDirectory_.ls().substring(2);
}
}
paths.add(currentDirectory_.getPath());
return ls(paths);
// If ls is called with paramters.
} else {
String lsOutput = "";
for (int i = 0; i < paths.size(); i++) {
JShellItem target = getItemAtPath(paths.get(i), 0);
if (!lsOutput.isEmpty()) {
lsOutput += "\n";
}
lsOutput += paths.get(i);
if (target == null) {
lsOutput += ": No such file or directory";
} else {
if (target instanceof Directory
&& currentOptions_.equals("R")
&& ((Directory) target).getNumDirectories() > 0
&& !(target instanceof DirectoryAlias)) {
List<String> recursivePath = recurseOnPath(paths.get(i), false);
Collections.reverse(recursivePath);
lsOutput += target.ls();
lsOutput += "\n";
lsOutput += ls(recursivePath.subList(1, recursivePath.size()));
} else {
// list paths separately
lsOutput += target.ls();
// if there are more paths, print a blank line
if (i < paths.size() - 1) {
lsOutput += "\n";
}
// notify user if there is an error in the path
// specified
}
}
}
return lsOutput;
}
}
