// TODO(calvin): See if this method is still necessary
public static Pair<String, String> parse(AlluxioURI path) {
Preconditions.checkArgument(path != null, "path may not be null");
if (path.hasScheme()) {
String header = path.getScheme() + "://";
String authority = (path.hasAuthority()) ? path.getAuthority() : "";
if (header.equals(Constants.HEADER)
|| header.equals(Constants.HEADER_FT)
|| isHadoopUnderFS(header)
|| header.equals(Constants.HEADER_S3)
|| header.equals(Constants.HEADER_S3A)
|| header.equals(Constants.HEADER_S3N)
|| header.equals(Constants.HEADER_OSS)
|| header.equals(Constants.HEADER_GCS)) {
if (path.getPath().isEmpty()) {
return new Pair<>(header + authority, AlluxioURI.SEPARATOR);
} else {
return new Pair<>(header + authority, path.getPath());
}
} else if (header.equals("file://")) {
return new Pair<>(AlluxioURI.SEPARATOR, path.getPath());
}
} else if (path.isPathAbsolute()) {
return new Pair<>(AlluxioURI.SEPARATOR, path.getPath());
}
return null;
}
/**
* Returns an {@link AlluxioURI} representation for the {@link UnderFileSystem} given a base UFS
* URI, and the Alluxio path from the base.
*
* <p>The default implementation simply concatenates the path to the base URI. This should be
* overridden if a subclass needs alternate functionality.
*
* @param ufsBaseUri the base {@link AlluxioURI} in the ufs
* @param alluxioPath the path in Alluxio from the given base
* @return the UFS {@link AlluxioURI} representing the Alluxio path
*/
public AlluxioURI resolveUri(AlluxioURI ufsBaseUri, String alluxioPath) {
return new AlluxioURI(
ufsBaseUri.getScheme(),
ufsBaseUri.getAuthority(),
PathUtils.concatPath(ufsBaseUri.getPath(), alluxioPath),
ufsBaseUri.getQueryMap());
}
/**
* Transforms the list of {@link AlluxioURI} in a new list of Strings, where each string is {@link
* AlluxioURI#getPath()}.
*
* @param uris the list of {@link AlluxioURI}s to be stripped
* @return a new list of strings mapping the input URIs to theri path component
*/
private List<String> stripURIList(List<AlluxioURI> uris) {
final List<String> pathStrings = new ArrayList<>(uris.size());
for (final AlluxioURI uri : uris) {
pathStrings.add(uri.getPath());
}
return pathStrings;
}