Class WSFileProvider

Method Details

• getType

  public URNResourceType getType()

  Returns the file type.

  Specified by:

  getType in interface IWSFileProvider

• getRoot

  public File getRoot() throws IOException

  Gets the root directory.

  Specified by:

  getRoot in interface IWSFileProvider

  Returns:

  The canonical root directory.

  Throws:

  IOException - If the root doesn't exist anymore or the provider is disposed of, or if the root doesn't exist and the directory cannot be created.

• isDisposed

  public boolean isDisposed()

  Checks if the provider is disposed of.

  Specified by:

  isDisposed in interface IWSFileProvider

  Returns:

  true if disposed, false otherwise.

• deleteAllFiles

  public boolean deleteAllFiles(Map<File,IOException> errorsMap) throws IOException

  Deletes all the files.

  Parameters:

  errorsMap - Error map that is filled in for unsuccessful operations, null for none.

  Returns:

  The success flag.

  Throws:

  IOException - If the errorMap is null and an exception deleting a file occurs.

• deleteAllFiles

  public boolean deleteAllFiles(Map<File,IOException> errorsMap, boolean logErrors) throws IOException

  Deletes all the files.

  Parameters:

  errorsMap - Error map that is filled in for unsuccessful operations, null for none.

  logErrors - Flag to log all errors.

  Returns:

  The success flag.

  Throws:

  IOException - If the errorMap is null and an exception deleting a file occurs.

• disposeNoThrow

  public void disposeNoThrow(boolean doDeleteAllFiles)

  Disposes of the file provider and optionally deletes all files from its root. If already disposed of, nothing will happen.

  Parameters:

  doDeleteAllFiles - Flag to delete all files.

• dispose

  public void dispose(boolean doDeleteAllFiles, boolean throwError) throws IOException

  Disposes of the file provider and optionally deletes all files from its root. If already disposed of, nothing will happen.

  Parameters:

  doDeleteAllFiles - Flag to delete all files.

  throwError - Flag to throw an error for failures, otherwise it is logged in the server.

  Throws:

  IOException - Upon delete failures and throwError is true.

• createDownloadInstance

  public IWSFileDownload createDownloadInstance(URL url, Object id, String description)

  Constructs an instance of a file to download.

  Specified by:

  createDownloadInstance in interface IWSFileProvider

  Parameters:

  url - The URL of the file to download.

  id - The ID used for database identification, Long or String, null when database is not used.

  This value depends on the URNResourceType. The types are:

  • Long  : URNResourceType.COMMON_DATABASE_PERSISTENT: Common database persistent files.
  • String: URNResourceType.APPLICATION_DATABASE_PERSISTENT: Application ID database persistent files.
  • Long : URNResourceType.GROUP_DATABASE_FILES: Group ID database persistent files.
  • Long : URNResourceType.USER_DATABASE_FILES: User ID database persistent files.

  description - Description of file, used to store in e.g. database, max 128 characters long.

  Throws:

  IllegalArgumentException - If the description is longer than 128 characters, or if the id is of wrong class (not String or Long) depending on the {@link URNResourceType}.

  NullPointerException - If url or description is null, or that the id is required to be specified for the {@link URNResourceType}.

• downloadFiles

  public void downloadFiles(IAppSessionGyro appGyro, IWSFileDownload[] files, Runnable completed)

  Downloads the collection of files. Once all downloads a completed, the callback is invoked. If the application session is disposed of, the callback is not called.

  Specified by:

  downloadFiles in interface IWSFileProvider

  Parameters:

  appGyro - The application session gyro, or null for system.

  files - The array of files to download. The results are placed in the respective instances.

  completed - Callback invoked upon completion of the downloads (with error or not).

• reserveFile

  public IWSFile reserveFile(File file, String descr, Object id) throws NotFoundException, IllegalArgumentException, IOException

  Reserves an existing file on disk, i.e. inside the root. If the file already is reserved, the previous WSFile instance is returned and no new reservation is done.

  Specified by:

  reserveFile in interface IWSFileProvider

  Parameters:

  file - The file.

  descr - The description.

  id - When a backing database is used, specify the user or group identifier as a Long, the Application ID as a String, or null when there is no special identifier, i.e. for global files.

  Returns:

  A new WSFile instance with a reserved name.

  Throws:

  NotFoundException - If the file doesn't exist.

  IllegalArgumentException - If the file parent is not this providers root directory, or if the ID does not match the database ID type (Long or String).

  IOException - For read errors of the file, or if the filename is not "compatible" with the database table.

• getURLPath

  public String getURLPath()

  Gets the URL path to the provider in the web server.

  Specified by:

  getURLPath in interface IWSFileProvider

  Returns:

  The path on the web server, starting and ending with '/'.

• getFileFromFileName

  public IWSFile getFileFromFileName(String fileName)

  Gets a WSFile from a file name that is located inside the root of the provider.

  Specified by:

  getFileFromFileName in interface IWSFileProvider

  Parameters:

  fileName - The file name to look up.

  Returns:

  The WSFile instance, or null if not found.

• toString

  public String toString()

  Gets the debug information string.

  Overrides:

  toString in class Object

  Returns:

  Used for logging, etc.