Module edu.ntnu.idatt1002.k01g08.fta

Package edu.ntnu.idatt1002.k01g08.fta.util

Class FileManager

java.lang.Object

edu.ntnu.idatt1002.k01g08.fta.util.FileManager

public class FileManager
extends Object

Contains static methods for reading and writing teams and tournaments to JSON files.

Constructor Summary

Constructors

Constructor	Description
FileManager()

Method Summary

Modifier and Type	Method	Description
static javax.json.JsonStructure	loadJson(File file)	Reads and returns a JSON structure from a file.
static javax.json.JsonArray	loadJsonArray(File file)	Reads and returns a JSON array from a file.
static javax.json.JsonObject	loadJsonObject(File file)	Reads and returns a JSON object from a file.
static TeamRegister	loadTeamRegister(File file)	Loads a team register from a file.
static Tournament	loadTournament(File file, TeamRegister teamRegister)	Loads a tournament from a file, pulling teams from a team register.
static boolean	saveIfAbsent(javax.json.JsonObject json, File file)	Saves a JSON structure to a file, if the file does not already exist.
static void	saveJson(javax.json.JsonStructure json, File file)	Saves a JSON structure to a file.
static void	saveTeamRegister(TeamRegister teamRegister, File file)	Saves a team register to a file.
static void	saveTournament(File file, Tournament tournament)	Saves a tournament to a file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FileManager

public FileManager()

Method Details

loadJson

public static javax.json.JsonStructure loadJson(File file)
                                         throws IOException

Reads and returns a JSON structure from a file.

Parameters:

file - a file to read from

Returns:

a JSON structure read from the file

Throws:

IOException - if the file for some reason could not be opened for reading

javax.json.JsonException - if a JSON object or array cannot be created due to incorrect representation

loadJsonArray

public static javax.json.JsonArray loadJsonArray(File file)
                                          throws IOException

Reads and returns a JSON array from a file.

Parameters:

file - a file to read from

Returns:

a JSON structure read from the file

Throws:

IOException - if the file for some reason could not be opened for reading

javax.json.JsonException - if a JSON array cannot be created due to incorrect representation

loadJsonObject

public static javax.json.JsonObject loadJsonObject(File file)
                                            throws IOException

Reads and returns a JSON object from a file.

Parameters:

file - a file to read from

Returns:

a JSON structure read from the file

Throws:

IOException - if the file for some reason could not be opened for reading

javax.json.JsonException - if a JSON object cannot be created due to incorrect representation

saveJson

public static void saveJson(javax.json.JsonStructure json,
 File file)
                     throws IOException

Saves a JSON structure to a file.

Parameters:

json - A JSON structure to save to a file

file - the file to save the JSON object to

Throws:

IOException - if file for some reason could not be saved

saveIfAbsent

public static boolean saveIfAbsent(javax.json.JsonObject json,
 File file)
                            throws IOException

Saves a JSON structure to a file, if the file does not already exist. Returns true if successful.

Parameters:

json - A JSON structure to save to a file

file - the file to save the JSON object to

Returns:

true if the file was created

Throws:

IOException - if file for some reason could not be saved

loadTeamRegister

public static TeamRegister loadTeamRegister(File file)
                                     throws IOException

Loads a team register from a file. Convenience method for parseTeamRegister(loadJsonArray(file)).

Parameters:

file - a file to load a team register from

Returns:

a team register parsed from the contents of the file

Throws:

IOException - if the file for some reason could not be opened for reading

saveTeamRegister

public static void saveTeamRegister(TeamRegister teamRegister,
 File file)
                             throws IOException

Saves a team register to a file.

Parameters:

teamRegister - a team register to save

file - the file to save to

Throws:

IOException - if the team register for some reason could not be saved

loadTournament

public static Tournament loadTournament(File file,
 TeamRegister teamRegister)
                                 throws IOException

Loads a tournament from a file, pulling teams from a team register. Convenience method for parseTournament(loadJsonObject(file), teamRegister).

Parameters:

file - a file to load a tournament from

Returns:

a tournament parsed from the contents of the file

Throws:

IOException - if the file for some reason could not be opened for reading

saveTournament

public static void saveTournament(File file,
 Tournament tournament)
                           throws IOException

Saves a tournament to a file.

Parameters:

tournament - a tournament to save

file - the file to save to

Throws:

IOException - if the tournament for some reason could not be saved