/**
* Join each element in paths in order, separated by {@code TachyonURI.SEPARATOR}.
*
* <p>For example, {@code concatPath("/myroot/", "dir", 1L, "filename")} returns {@code
* "/myroot/dir/1/filename"}, or {@code concatPath("tachyon://myroot", "dir", "filename")} returns
* {@code "tachyon://myroot/dir/filename"}. Note that a null element in paths is treated as empty
* string, i.e., "".
*
* @param paths to concatenate
* @return joined path
* @throws IllegalArgumentException
*/
public static String concatPath(Object... paths) throws IllegalArgumentException {
if (null == paths) {
throw new IllegalArgumentException("Can not concatenate a null set of paths.");
}
String path;
String trimmedPath;
List<String> trimmedPathList = new ArrayList<String>();
if (paths.length > 0 && paths[0] != null && !paths[0].toString().isEmpty()) {
path = paths[0].toString().trim();
trimmedPath = CharMatcher.is(TachyonURI.SEPARATOR.charAt(0)).trimTrailingFrom(path);
trimmedPathList.add(trimmedPath);
}
for (int k = 1; k < paths.length; k++) {
if (null == paths[k]) {
continue;
}
path = paths[k].toString().trim();
trimmedPath = CharMatcher.is(TachyonURI.SEPARATOR.charAt(0)).trimFrom(path);
if (!trimmedPath.isEmpty()) {
trimmedPathList.add(trimmedPath);
}
}
if (trimmedPathList.size() == 1 && trimmedPathList.get(0).isEmpty()) {
// paths[0] must be "[/]+"
return TachyonURI.SEPARATOR;
}
return Joiner.on(TachyonURI.SEPARATOR).join(trimmedPathList);
}
public String getName() {
if (TachyonURI.SEPARATOR.equals(mAbsolutePath)) {
return "root";
} else {
return mName;
}
}
/**
* Check if the given path is the root.
*
* @param path The path to check
* @return true if the path is the root
* @throws InvalidPathException
*/
public static boolean isRoot(String path) throws InvalidPathException {
return TachyonURI.SEPARATOR.equals(cleanPath(path));
}