Solved Saving ArrayList in custom object

Discussion in 'Plugin Development' started by The_Spaceman, Oct 26, 2019.

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  1. Offline

    The_Spaceman

    Hello,

    I want to save an ArrayList<UUID> inside of a custom object, this is what i have:
    Code:java
    1. ArrayList<UUID> uuidList = someList;
    2. @Override
    3. public Map<String, Object> serialize() {
    4.     Map<String, Object> map = new HashMap<>();
    5.     map.put("list", uuidList);
    6.     return map;
    7. }
    8.  
    9. public static Object deserialize(Map<String, Object> args) {
    10.     Object o = new Object();
    11.     o.setList((ArrayList<UUID>) args.getOrDefault("list", new ArrayList<>()));
    12. }


    but when the server tries to deserialize I get the eror:
    Show Spoiler

    Code:java
    1. org.bukkit.configuration.InvalidConfigurationException: could not determine a constructor for the tag tag:yaml.org,2002:java.util.UUID
    2. in 'string', line 48, column 11:
    3.             - !!java.util.UUID '4c386ae3-8e21- ...
    4.               ^
    5.  
    6.         at org.bukkit.configuration.file.YamlConfiguration.loadFromString(YamlConfiguration.java:56) ~[server.jar:git-Spigot-9de398a-9c887d4]
    7.         at org.bukkit.configuration.file.FileConfiguration.load(FileConfiguration.java:160) ~[server.jar:git-Spigot-9de398a-9c887d4]
    8.         at org.bukkit.configuration.file.FileConfiguration.load(FileConfiguration.java:128) ~[server.jar:git-Spigot-9de398a-9c887d4]
    9.         at org.bukkit.configuration.file.YamlConfiguration.loadConfiguration(YamlConfiguration.java:183) [server.jar:git-Spigot-9de398a-9c887d4]
    10.         at com.spaceman.tport.fileHander.Files.reloadConfig(Files.java:31) [TPort.jar:?]
    11.         at com.spaceman.tport.fileHander.Files.getConfig(Files.java:36) [TPort.jar:?]
    12.         at com.spaceman.tport.Main.onEnable(Main.java:164) [TPort.jar:?]
    13.         at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) [server.jar:git-Spigot-9de398a-9c887d4]
    14.         at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:352) [server.jar:git-Spigot-9de398a-9c887d4]
    15.         at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:417) [server.jar:git-Spigot-9de398a-9c887d4]
    16.         at org.bukkit.craftbukkit.v1_14_R1.CraftServer.enablePlugin(CraftServer.java:461) [server.jar:git-Spigot-9de398a-9c887d4]
    17.         at org.bukkit.craftbukkit.v1_14_R1.CraftServer.enablePlugins(CraftServer.java:375) [server.jar:git-Spigot-9de398a-9c887d4]
    18.         at org.bukkit.craftbukkit.v1_14_R1.CraftServer.reload(CraftServer.java:810) [server.jar:git-Spigot-9de398a-9c887d4]
    19.         at org.bukkit.Bukkit.reload(Bukkit.java:576) [server.jar:git-Spigot-9de398a-9c887d4]
    20.         at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:27) [server.jar:git-Spigot-9de398a-9c887d4]
    21.         at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149) [server.jar:git-Spigot-9de398a-9c887d4]
    22.         at org.bukkit.craftbukkit.v1_14_R1.CraftServer.dispatchCommand(CraftServer.java:710) [server.jar:git-Spigot-9de398a-9c887d4]
    23.         at org.bukkit.craftbukkit.v1_14_R1.CraftServer.dispatchServerCommand(CraftServer.java:695) [server.jar:git-Spigot-9de398a-9c887d4]
    24.         at net.minecraft.server.v1_14_R1.DedicatedServer.handleCommandQueue(DedicatedServer.java:433) [server.jar:git-Spigot-9de398a-9c887d4]
    25.         at net.minecraft.server.v1_14_R1.DedicatedServer.b(DedicatedServer.java:397) [server.jar:git-Spigot-9de398a-9c887d4]
    26.         at net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:971) [server.jar:git-Spigot-9de398a-9c887d4]
    27.         at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:816) [server.jar:git-Spigot-9de398a-9c887d4]
    28.         at java.lang.Thread.run(Unknown Source) [?:1.8.0_231]
    29. Caused by: org.yaml.snakeyaml.constructor.ConstructorException: could not determine a constructor for the tag tag:yaml.org,2002:java.util.UUID
    30. in 'string', line 48, column 11:
    31.             - !!java.util.UUID '4c386ae3-8e21- ...
    32.               ^
    33.  
    34.         at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructUndefined.construct(SafeConstructor.java:541) ~[server.jar:git-Spigot-9de398a-9c887d4]
    35.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructObjectNoCheck(BaseConstructor.java:204) ~[server.jar:git-Spigot-9de398a-9c887d4]
    36.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:193) ~[server.jar:git-Spigot-9de398a-9c887d4]
    37.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructSequenceStep2(BaseConstructor.java:364) ~[server.jar:git-Spigot-9de398a-9c887d4]
    38.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructSequence(BaseConstructor.java:348) ~[server.jar:git-Spigot-9de398a-9c887d4]
    39.         at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlSeq.construct(SafeConstructor.java:499) ~[server.jar:git-Spigot-9de398a-9c887d4]
    40.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructObjectNoCheck(BaseConstructor.java:204) ~[server.jar:git-Spigot-9de398a-9c887d4]
    41.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:193) ~[server.jar:git-Spigot-9de398a-9c887d4]
    42.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping2ndStep(BaseConstructor.java:453) ~[server.jar:git-Spigot-9de398a-9c887d4]
    43.         at org.yaml.snakeyaml.constructor.SafeConstructor.constructMapping2ndStep(SafeConstructor.java:184) ~[server.jar:git-Spigot-9de398a-9c887d4]
    44.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping(BaseConstructor.java:434) ~[server.jar:git-Spigot-9de398a-9c887d4]
    45.         at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlMap.construct(SafeConstructor.java:521) ~[server.jar:git-Spigot-9de398a-9c887d4]
    46.         at org.bukkit.configuration.file.YamlConstructor$ConstructCustomObject.construct(YamlConstructor.java:28) ~[server.jar:git-Spigot-9de398a-9c887d4]
    47.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructObjectNoCheck(BaseConstructor.java:204) ~[server.jar:git-Spigot-9de398a-9c887d4]
    48.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:193) ~[server.jar:git-Spigot-9de398a-9c887d4]
    49.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping2ndStep(BaseConstructor.java:453) ~[server.jar:git-Spigot-9de398a-9c887d4]
    50.         at org.yaml.snakeyaml.constructor.SafeConstructor.constructMapping2ndStep(SafeConstructor.java:184) ~[server.jar:git-Spigot-9de398a-9c887d4]
    51.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping(BaseConstructor.java:434) ~[server.jar:git-Spigot-9de398a-9c887d4]
    52.         at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlMap.construct(SafeConstructor.java:521) ~[server.jar:git-Spigot-9de398a-9c887d4]
    53.         at org.bukkit.configuration.file.YamlConstructor$ConstructCustomObject.construct(YamlConstructor.java:28) ~[server.jar:git-Spigot-9de398a-9c887d4]
    54.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructObjectNoCheck(BaseConstructor.java:204) ~[server.jar:git-Spigot-9de398a-9c887d4]
    55.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:193) ~[server.jar:git-Spigot-9de398a-9c887d4]
    56.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping2ndStep(BaseConstructor.java:453) ~[server.jar:git-Spigot-9de398a-9c887d4]
    57.         at org.yaml.snakeyaml.constructor.SafeConstructor.constructMapping2ndStep(SafeConstructor.java:184) ~[server.jar:git-Spigot-9de398a-9c887d4]
    58.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping(BaseConstructor.java:434) ~[server.jar:git-Spigot-9de398a-9c887d4]
    59.         at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlMap.construct(SafeConstructor.java:521) ~[server.jar:git-Spigot-9de398a-9c887d4]
    60.         at org.bukkit.configuration.file.YamlConstructor$ConstructCustomObject.construct(YamlConstructor.java:28) ~[server.jar:git-Spigot-9de398a-9c887d4]
    61.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructObjectNoCheck(BaseConstructor.java:204) ~[server.jar:git-Spigot-9de398a-9c887d4]
    62.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:193) ~[server.jar:git-Spigot-9de398a-9c887d4]
    63.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping2ndStep(BaseConstructor.java:453) ~[server.jar:git-Spigot-9de398a-9c887d4]
    64.         at org.yaml.snakeyaml.constructor.SafeConstructor.constructMapping2ndStep(SafeConstructor.java:184) ~[server.jar:git-Spigot-9de398a-9c887d4]
    65.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping(BaseConstructor.java:434) ~[server.jar:git-Spigot-9de398a-9c887d4]
    66.         at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlMap.construct(SafeConstructor.java:521) ~[server.jar:git-Spigot-9de398a-9c887d4]
    67.         at org.bukkit.configuration.file.YamlConstructor$ConstructCustomObject.construct(YamlConstructor.java:28) ~[server.jar:git-Spigot-9de398a-9c887d4]
    68.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructObjectNoCheck(BaseConstructor.java:204) ~[server.jar:git-Spigot-9de398a-9c887d4]
    69.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:193) ~[server.jar:git-Spigot-9de398a-9c887d4]
    70.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping2ndStep(BaseConstructor.java:453) ~[server.jar:git-Spigot-9de398a-9c887d4]
    71.         at org.yaml.snakeyaml.constructor.SafeConstructor.constructMapping2ndStep(SafeConstructor.java:184) ~[server.jar:git-Spigot-9de398a-9c887d4]
    72.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructMapping(BaseConstructor.java:434) ~[server.jar:git-Spigot-9de398a-9c887d4]
    73.         at org.yaml.snakeyaml.constructor.SafeConstructor$ConstructYamlMap.construct(SafeConstructor.java:521) ~[server.jar:git-Spigot-9de398a-9c887d4]
    74.         at org.bukkit.configuration.file.YamlConstructor$ConstructCustomObject.construct(YamlConstructor.java:28) ~[server.jar:git-Spigot-9de398a-9c887d4]
    75.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructObjectNoCheck(BaseConstructor.java:204) ~[server.jar:git-Spigot-9de398a-9c887d4]
    76.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:193) ~[server.jar:git-Spigot-9de398a-9c887d4]
    77.         at org.yaml.snakeyaml.constructor.BaseConstructor.constructDocument(BaseConstructor.java:159) ~[server.jar:git-Spigot-9de398a-9c887d4]
    78.         at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:146) ~[server.jar:git-Spigot-9de398a-9c887d4]
    79.         at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:524) ~[server.jar:git-Spigot-9de398a-9c887d4]
    80.         at org.yaml.snakeyaml.Yaml.load(Yaml.java:437) ~[server.jar:git-Spigot-9de398a-9c887d4]
    81.         at org.bukkit.configuration.file.YamlConfiguration.loadFromString(YamlConfiguration.java:54) ~[server.jar:git-Spigot-9de398a-9c887d4]
    82.         ... 22 more


    and it can't deserialize the ArrayList. But saving the ArrayList like file.getConfigFile().set("somePlace", list); works... but that is not what I want.
    I only get errors when deserializing...

    and yes, I did register the class using:
    ConfigurationSerialization.registerClass(SomeClass.class, "SomeClass");

    And I also know it has its issues with deserializing Enums, now I save the name and use Enum.valueOf(name).

    What should I do with saving the ArrayList?
    And is there a better way to save enums and getting the enums using the ConfigurationSerializable?

    Thank you
     
    Last edited: Oct 26, 2019
    The_Spaceman, Oct 26, 2019
    #1
  2. Offline

    robertlit

    Just do HashMap<String, ArrayList<UUID>>
     
    robertlit, Oct 26, 2019
    #2
  3. Offline

    The_Spaceman

    I don't understand you with 'just do'.
    I have the feeling that this also won't work:
    Code:java
    1. @Override
    2. public Map<String, Object> serialize() {
    3.     Map<String, Object> map = new HashMap<>();
    4.     Map<String, UUID> newMap = new HashMap<>();
    5.     newMap.put("IDontKnow", uuidList);
    6.     map.put("list", newMap);
    7.     return map;
    8. }


    Or is this not wat you ment?
    maybe I can save it as a base64 string object?
     
    The_Spaceman, Oct 26, 2019
    #3
  4. Offline

    Zombie_Striker

    @The_Spaceman
    UUID (for some reason) are not serializable. Because of this, when saving uuids, you will need to convert the List<UUID> to a List<String> and just convert all uuids to strings using .toString(). Then, when loading the uuids, use UUID.fromString(....) to get the uuid object.
     
    Zombie_Striker, Oct 26, 2019
    #4
  5. Offline

    The_Spaceman

    yes this works, thank you

    to deserialize:
    ArrayList<UUID> list = (((ArrayList<String>) args.getOrDefault("list", new ArrayList<>())).stream().map(UUID::fromString).collect(Collectors.toCollection(ArrayList::new)));

    to serialize:
    map.put("list", list.stream().map(UUID::toString).collect(Collectors.toList()));
     
    The_Spaceman, Oct 26, 2019
    #5
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