public static FileSystem get(URI uri, Configuration conf) throws IOException {
    String scheme = uri.getScheme();
    String authority = uri.getAuthority();

    if (scheme == null) {                       // no scheme: use default FS
      return get(conf);
    }

    if (authority == null) {                       // no authority
      URI defaultUri = getDefaultUri(conf);
      if (scheme.equals(defaultUri.getScheme())    // if scheme matches default
          && defaultUri.getAuthority() != null) {  // & default has authority
        return get(defaultUri, conf);              // return default
      }
    }

    String disableCacheName = String.format("fs.%s.impl.disable.cache", scheme);
    if (conf.getBoolean(disableCacheName, false)) {
      return createFileSystem(uri, conf, null);
    }

    return CACHE.get(uri, conf);
  }
public static FileSystem get ( URI uri , Configuration conf ) throws IOException { String scheme = uri . getScheme ( ) ; String authority = uri . getAuthority ( ) ; if ( scheme == null ) { return get ( conf ) ; } if ( authority == null ) { URI defaultUri = getDefaultUri ( conf ) ; if ( scheme . equals ( defaultUri . getScheme ( ) ) && defaultUri . getAuthority ( ) != null ) { return get ( defaultUri , conf ) ; } } String disableCacheName = String . format ( "fs.%s.impl.disable.cache" , scheme ) ; if ( conf . getBoolean ( disableCacheName , false ) ) { return createFileSystem ( uri , conf , null ) ; } return CACHE . get ( uri , conf ) ; }
Returns the FileSystem for this URI's scheme and authority.  The scheme
of the URI determines a configuration property name,
<tt>fs.<i>scheme</i>.class</tt> whose value names the FileSystem class.
The entire URI is passed to the FileSystem instance's initialize method.