Merge branch 'javafx' of github.com:huanghongxun/HMCL into javafx

HMCL/src/main/java/org/jackhuang/hmcl/game/LauncherHelper.java

@@ -122,14 +122,14 @@ public final class LauncherHelper {
         Optional<String> gameVersion = GameVersion.minecraftVersion(repository.getVersionJar(version));
 
         TaskExecutor executor = Task.of(Schedulers.javafx(), () -> emitStatus(LoadingState.DEPENDENCIES))
-                .then(variables -> {
+                .then(() -> {
                     if (setting.isNotCheckGame())
                         return null;
                     else
                         return dependencyManager.checkGameCompletionAsync(version);
                 })
                 .then(Task.of(Schedulers.javafx(), () -> emitStatus(LoadingState.MODS)))
-                .then(var -> {
+                .then(() -> {
                     try {
                         ModpackConfiguration<?> configuration = ModpackHelper.readModpackConfiguration(repository.getModpackConfiguration(selectedVersion));
                         if ("Curse".equals(configuration.getType()))
@@ -141,44 +141,42 @@ public final class LauncherHelper {
                     }
                 })
                 .then(Task.of(Schedulers.javafx(), () -> emitStatus(LoadingState.LOGGING_IN)))
-                .then(Task.of(i18n("account.methods"), variables -> {
+                .thenTaskResult(() -> Task.ofResult(i18n("account.methods"), () -> {
                     try {
-                        variables.set("account", account.logIn());
+                        return account.logIn();
                     } catch (CredentialExpiredException e) {
                         LOG.info("Credential has expired: " + e);
-                        variables.set("account", DialogController.logIn(account));
+                        return DialogController.logIn(account);
                     } catch (AuthenticationException e) {
                         LOG.warning("Authentication failed, try playing offline: " + e);
-                        variables.set("account",
+                        return account.playOffline().orElseThrow(() -> e);
-                                account.playOffline().orElseThrow(() -> e));
                     }
                 }))
-                .then(Task.of(Schedulers.javafx(), () -> emitStatus(LoadingState.LAUNCHING)))
+                .thenResult(Schedulers.javafx(), authInfo -> {
-                .then(Task.of(variables -> {
+                    emitStatus(LoadingState.LAUNCHING);
-                    variables.set("launcher", new HMCLGameLauncher(
+                    return authInfo;
-                            repository,
+                })
-                            selectedVersion,
+                .thenResult(authInfo -> new HMCLGameLauncher(
-                            variables.get("account"),
+                        repository,
-                            setting.toLaunchOptions(profile.getGameDir()),
+                        selectedVersion,
-                            launcherVisibility == LauncherVisibility.CLOSE
+                        authInfo,
-                                    ? null // Unnecessary to start listening to game process output when close launcher immediately after game launched.
+                        setting.toLaunchOptions(profile.getGameDir()),
-                                    : new HMCLProcessListener(variables.get("account"), setting, gameVersion.isPresent())
+                        launcherVisibility == LauncherVisibility.CLOSE
-                    ));
+                                ? null // Unnecessary to start listening to game process output when close launcher immediately after game launched.
-                }))
+                                : new HMCLProcessListener(authInfo, setting, gameVersion.isPresent())
-                .then(variables -> {
+                ))
-                    DefaultLauncher launcher = variables.get("launcher");
+                .thenTaskResult(launcher -> { // launcher is prev task's result
                     if (scriptFile == null) {
                         return new LaunchTask<>(launcher::launch).setName(i18n("version.launch"));
                     } else {
-                        return new LaunchTask<>(() -> {
+                        return new LaunchTask<ManagedProcess>(() -> {
                             launcher.makeLaunchScript(scriptFile);
                             return null;
                         }).setName(i18n("version.launch_script"));
                     }
                 })
-                .then(Task.of(variables -> {
+                .thenVoid(process -> { // process is LaunchTask's result
                     if (scriptFile == null) {
-                        ManagedProcess process = variables.get(LaunchTask.LAUNCH_ID);
                         PROCESSES.add(process);
                         if (launcherVisibility == LauncherVisibility.CLOSE)
                             Launcher.stopApplication();
@@ -187,13 +185,13 @@ public final class LauncherHelper {
                                 process.stop();
                                 it.fireEvent(new DialogCloseEvent());
                             });
-                    } else
+                    } else {
                         Platform.runLater(() -> {
                             launchingStepsPane.fireEvent(new DialogCloseEvent());
                             Controllers.dialog(i18n("version.launch_script.success", scriptFile.getAbsolutePath()));
                         });
-
+                    }
-                }))
+                })
                 .executor();
 
         launchingStepsPane.setExecutor(executor, false);
@@ -429,13 +427,6 @@ public final class LauncherHelper {
         public void execute() throws Exception {
             setResult(supplier.get());
         }
-
-        @Override
-        public String getId() {
-            return LAUNCH_ID;
-        }
-
-        static final String LAUNCH_ID = "launch";
     }
 
     /**

HMCL/src/main/java/org/jackhuang/hmcl/game/ModpackHelper.java

@@ -110,13 +110,13 @@ public final class ModpackHelper {
 
         if (modpack.getManifest() instanceof CurseManifest)
             return new CurseInstallTask(profile.getDependency(), zipFile, modpack, ((CurseManifest) modpack.getManifest()), name)
-                    .finalized(Schedulers.defaultScheduler(), ExceptionalConsumer.fromRunnable(success), failure);
+                    .finalized(Schedulers.defaultScheduler(), success, failure);
         else if (modpack.getManifest() instanceof HMCLModpackManifest)
             return new HMCLModpackInstallTask(profile, zipFile, modpack, name)
-                    .finalized(Schedulers.defaultScheduler(), ExceptionalConsumer.fromRunnable(success), failure);
+                    .finalized(Schedulers.defaultScheduler(), success, failure);
         else if (modpack.getManifest() instanceof MultiMCInstanceConfiguration)
             return new MultiMCModpackInstallTask(profile.getDependency(), zipFile, modpack, ((MultiMCInstanceConfiguration) modpack.getManifest()), name)
-                    .finalized(Schedulers.defaultScheduler(), ExceptionalConsumer.fromRunnable(success), failure)
+                    .finalized(Schedulers.defaultScheduler(), success, failure)
                     .then(new MultiMCInstallVersionSettingTask(profile, ((MultiMCInstanceConfiguration) modpack.getManifest()), name));
         else throw new IllegalStateException("Unrecognized modpack: " + modpack);
     }

HMCL/src/main/java/org/jackhuang/hmcl/ui/LeftPaneController.java

@@ -121,13 +121,12 @@ public final class LeftPaneController extends AdvancedListBox {
                     if (modpackFile.exists()) {
                         Task.ofResult(() -> CompressingUtils.findSuitableEncoding(modpackFile.toPath()))
                                 .thenResult(encoding -> ModpackHelper.readModpackManifest(modpackFile.toPath(), encoding))
-                                .thenResult(modpack -> {
+                                .thenVoid(modpack -> {
                                     AtomicReference<Region> region = new AtomicReference<>();
                                     TaskExecutor executor = ModpackHelper.getInstallTask(repository.getProfile(), modpackFile, modpack.getName(), modpack)
                                             .with(Task.of(Schedulers.javafx(), this::checkAccount)).executor();
                                     region.set(Controllers.taskDialog(executor, i18n("modpack.installing")));
                                     executor.start();
-                                    return null;
                                 }).start();
                     }
                 }

HMCL/src/main/java/org/jackhuang/hmcl/ui/account/AccountLoginPane.java

@@ -62,7 +62,7 @@ public class AccountLoginPane extends StackPane {
         progressBar.setVisible(true);
         lblCreationWarning.setText("");
         Task.ofResult(() -> oldAccount.logInWithPassword(password))
-                .finalizedResult(Schedulers.javafx(), authInfo -> {
+                .finalized(Schedulers.javafx(), authInfo -> {
                     success.accept(authInfo);
                     fireEvent(new DialogCloseEvent());
                     progressBar.setVisible(false);

HMCL/src/main/java/org/jackhuang/hmcl/ui/account/AddAccountPane.java

@@ -196,7 +196,7 @@ public class AddAccountPane extends StackPane {
         Object additionalData = getAuthAdditionalData();
 
         Task.ofResult(() -> factory.create(new Selector(), username, password, additionalData))
-                .finalizedResult(Schedulers.javafx(), account -> {
+                .finalized(Schedulers.javafx(), account -> {
                     int oldIndex = Accounts.getAccounts().indexOf(account);
                     if (oldIndex == -1) {
                         Accounts.getAccounts().add(account);

HMCL/src/main/java/org/jackhuang/hmcl/ui/account/AddAuthlibInjectorServerPane.java

@@ -106,7 +106,7 @@ public class AddAuthlibInjectorServerPane extends StackPane implements DialogAwa
 
         Task.of(() -> {
             serverBeingAdded = AuthlibInjectorServer.locateServer(url);
-        }).finalized(Schedulers.javafx(), (variables, isDependentsSucceeded, exception) -> {
+        }).finalized(Schedulers.javafx(), (isDependentsSucceeded, exception) -> {
             addServerPane.setDisable(false);
             nextPane.hideSpinner();
 

HMCL/src/main/java/org/jackhuang/hmcl/ui/download/InstallerWizardProvider.java

@@ -27,6 +27,7 @@ import org.jackhuang.hmcl.game.Version;
 import org.jackhuang.hmcl.setting.Profile;
 import org.jackhuang.hmcl.task.DownloadException;
 import org.jackhuang.hmcl.task.Task;
+import org.jackhuang.hmcl.task.TaskResult;
 import org.jackhuang.hmcl.ui.Controllers;
 import org.jackhuang.hmcl.ui.construct.MessageDialogPane.MessageType;
 import org.jackhuang.hmcl.ui.wizard.WizardController;
@@ -89,16 +90,16 @@ public final class InstallerWizardProvider implements WizardProvider {
         settings.put("success_message", i18n("install.success"));
         settings.put("failure_callback", (FailureCallback) (settings1, exception, next) -> alertFailureMessage(exception, next));
 
-        Task ret = Task.ofResult("version", () -> version);
+        TaskResult<Version> ret = Task.ofResult(() -> version);
 
         if (settings.containsKey("forge"))
-            ret = ret.then(profile.getDependency().installLibraryAsync((RemoteVersion) settings.get("forge")));
+            ret = ret.thenTaskResult(profile.getDependency().installLibraryAsync((RemoteVersion) settings.get("forge")));
 
         if (settings.containsKey("liteloader"))
-            ret = ret.then(profile.getDependency().installLibraryAsync((RemoteVersion) settings.get("liteloader")));
+            ret = ret.thenTaskResult(profile.getDependency().installLibraryAsync((RemoteVersion) settings.get("liteloader")));
 
         if (settings.containsKey("optifine"))
-            ret = ret.then(profile.getDependency().installLibraryAsync((RemoteVersion) settings.get("optifine")));
+            ret = ret.thenTaskResult(profile.getDependency().installLibraryAsync((RemoteVersion) settings.get("optifine")));
 
         return ret.then(profile.getRepository().refreshVersionsAsync());
     }

HMCL/src/main/java/org/jackhuang/hmcl/ui/download/ModpackPage.java

@@ -111,7 +111,7 @@ public final class ModpackPage extends StackPane implements WizardPage {
         spinnerPane.showSpinner();
         Task.ofResult(() -> CompressingUtils.findSuitableEncoding(selectedFile.toPath()))
                 .thenResult(encoding -> manifest = ModpackHelper.readModpackManifest(selectedFile.toPath(), encoding))
-                .finalizedResult(Schedulers.javafx(), manifest -> {
+                .finalized(Schedulers.javafx(), manifest -> {
                     spinnerPane.hideSpinner();
                     controller.getSettings().put(MODPACK_MANIFEST, manifest);
                     lblName.setText(manifest.getName());

HMCL/src/main/java/org/jackhuang/hmcl/ui/download/VanillaInstallWizardProvider.java

@@ -59,7 +59,7 @@ public final class VanillaInstallWizardProvider implements WizardProvider {
         if (settings.containsKey("optifine"))
             builder.version((RemoteVersion) settings.get("optifine"));
 
-        return builder.buildAsync().finalized((a, b, c) -> profile.getRepository().refreshVersions())
+        return builder.buildAsync().finalized((a, b) -> profile.getRepository().refreshVersions())
                 .then(Task.of(Schedulers.javafx(), () -> profile.setSelectedVersion(name)));
     }
 

HMCL/src/main/java/org/jackhuang/hmcl/ui/download/VersionsPage.java

@@ -128,7 +128,7 @@ public final class VersionsPage extends BorderPane implements WizardPage, Refres
     @Override
     public void refresh() {
         transitionHandler.setContent(spinner, ContainerAnimations.FADE.getAnimationProducer());
-        executor = versionList.refreshAsync(gameVersion, downloadProvider).finalized((variables, isDependentsSucceeded, exception) -> {
+        executor = versionList.refreshAsync(gameVersion, downloadProvider).finalized((isDependentsSucceeded, exception) -> {
             if (isDependentsSucceeded) {
                 List<VersionsPageItem> items = loadVersions();
 

HMCL/src/main/java/org/jackhuang/hmcl/ui/versions/InstallerListPage.java

@@ -54,7 +54,7 @@ public class InstallerListPage extends ListPage<InstallerItem> {
             LinkedList<Library> newList = new LinkedList<>(version.getLibraries());
             newList.remove(library);
             new MaintainTask(version.setLibraries(newList))
-                    .then(variables -> new VersionJsonSaveTask(profile.getRepository(), variables.get(MaintainTask.ID)))
+                    .then(maintainedVersion -> new VersionJsonSaveTask(profile.getRepository(), maintainedVersion))
                     .with(profile.getRepository().refreshVersionsAsync())
                     .with(Task.of(Schedulers.javafx(), () -> loadVersion(this.profile, this.versionId)))
                     .start();

HMCL/src/main/java/org/jackhuang/hmcl/ui/versions/ModListPage.java

@@ -36,7 +36,6 @@ import org.jackhuang.hmcl.task.Schedulers;
 import org.jackhuang.hmcl.task.Task;
 import org.jackhuang.hmcl.ui.Controllers;
 import org.jackhuang.hmcl.ui.FXUtils;
-import org.jackhuang.hmcl.ui.ListPage;
 import org.jackhuang.hmcl.util.Logging;
 import org.jackhuang.hmcl.util.io.FileUtils;
 
@@ -86,13 +85,13 @@ public final class ModListPage extends Control {
 
     public void loadMods(ModManager modManager) {
         this.modManager = modManager;
-        Task.ofResult("list", variables -> {
+        Task.ofResult(() -> {
             synchronized (ModListPage.this) {
                 JFXUtilities.runInFX(() -> loadingProperty().set(true));
                 modManager.refreshMods();
                 return new LinkedList<>(modManager.getMods());
             }
-        }).finalizedResult(Schedulers.javafx(), (list, isDependentsSucceeded, exception) -> {
+        }).finalized(Schedulers.javafx(), (list, isDependentsSucceeded, exception) -> {
             loadingProperty().set(false);
             if (isDependentsSucceeded)
                 FXUtils.onWeakChangeAndOperate(parentTab.getSelectionModel().selectedItemProperty(), newValue -> {
@@ -112,7 +111,7 @@ public final class ModListPage extends Control {
         List<String> succeeded = new LinkedList<>();
         List<String> failed = new LinkedList<>();
         if (res == null) return;
-        Task.of(variables -> {
+        Task.of(() -> {
             for (File file : res) {
                 try {
                     modManager.addMod(file);
@@ -124,7 +123,7 @@ public final class ModListPage extends Control {
                     // Actually addMod will not throw exceptions because FileChooser has already filtered files.
                 }
             }
-        }).with(Task.of(Schedulers.javafx(), variables -> {
+        }).with(Task.of(Schedulers.javafx(), () -> {
             List<String> prompt = new LinkedList<>();
             if (!succeeded.isEmpty())
                 prompt.add(i18n("mods.add.success", String.join(", ", succeeded)));

HMCL/src/main/java/org/jackhuang/hmcl/ui/versions/VersionSettingsPage.java

@@ -57,6 +57,7 @@ import java.io.IOException;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.Arrays;
+import java.util.Optional;
 import java.util.logging.Level;
 import java.util.stream.Collectors;
 
@@ -117,14 +118,13 @@ public final class VersionSettingsPage extends StackPane implements DecoratorPag
 
         FXUtils.smoothScrolling(scroll);
 
-        Task.ofResult(JavaVersion::getJavas).thenResult(Schedulers.javafx(), list -> {
+        Task.ofResult(JavaVersion::getJavas).thenVoid(Schedulers.javafx(), list -> {
             javaItem.loadChildren(list.stream()
                     .map(javaVersion -> javaItem.createChildren(javaVersion.getVersion() + i18n("settings.game.java_directory.bit",
                             javaVersion.getPlatform().getBit()), javaVersion.getBinary().toString(), javaVersion))
                     .collect(Collectors.toList()));
             javaItemsLoaded = true;
             initializeSelectedJava();
-            return null;
         }).start();
 
         javaItem.setSelectedData(null);
@@ -273,10 +273,10 @@ public final class VersionSettingsPage extends StackPane implements DecoratorPag
         VersionSetting versionSetting = lastVersionSetting;
         if (versionSetting == null)
             return;
-        Task.of(variables -> variables.set("java", versionSetting.getJavaVersion()))
+        Task.ofResult(versionSetting::getJavaVersion)
-                .subscribe(Task.of(Schedulers.javafx(),
+                .thenVoid(Schedulers.javafx(), javaVersion -> javaItem.setSubtitle(Optional.ofNullable(javaVersion)
-                        variables -> javaItem.setSubtitle(variables.<JavaVersion>getOptional("java")
+                        .map(JavaVersion::getBinary).map(Path::toString).orElse("Invalid Java Path")))
-                                .map(JavaVersion::getBinary).map(Path::toString).orElse("Invalid Java Path"))));
+                .start();
     }
 
     @FXML

HMCL/src/main/java/org/jackhuang/hmcl/ui/versions/WorldListPage.java

@@ -29,7 +29,6 @@ import org.jackhuang.hmcl.util.Logging;
 import org.jackhuang.hmcl.util.io.FileUtils;
 
 import java.io.File;
-import java.io.IOException;
 import java.nio.file.FileAlreadyExistsException;
 import java.nio.file.Path;
 import java.util.List;
@@ -52,7 +51,7 @@ public class WorldListPage extends ListPage<WorldListItem> {
 
         setLoading(true);
         Task.ofResult(() -> World.getWorlds(savesDir).parallel().collect(Collectors.toList()))
-                .finalizedResult(Schedulers.javafx(), (result, isDependentsSucceeded, exception) -> {
+                .finalized(Schedulers.javafx(), (result, isDependentsSucceeded, exception) -> {
                     setLoading(false);
                     if (isDependentsSucceeded)
                         itemsProperty().setAll(result.stream().map(WorldListItem::new).collect(Collectors.toList()));
@@ -74,10 +73,10 @@ public class WorldListPage extends ListPage<WorldListItem> {
         // Only accept one world file because user is required to confirm the new world name
         // Or too many input dialogs are popped.
         Task.ofResult(() -> new World(zipFile.toPath()))
-                .finalizedResult(Schedulers.javafx(), world -> {
+                .finalized(Schedulers.javafx(), world -> {
                     Controllers.inputDialog(i18n("world.name.enter"), (name, resolve, reject) -> {
                         Task.of(() -> world.install(savesDir, name))
-                                .finalized(Schedulers.javafx(), var -> {
+                                .finalized(Schedulers.javafx(), () -> {
                                     itemsProperty().add(new WorldListItem(new World(savesDir.resolve(name))));
                                     resolve.run();
                                 }, e -> {

HMCLCore/src/main/java/org/jackhuang/hmcl/download/DefaultDependencyManager.java

@@ -28,7 +28,7 @@ import org.jackhuang.hmcl.game.DefaultGameRepository;
 import org.jackhuang.hmcl.game.Version;
 import org.jackhuang.hmcl.task.ParallelTask;
 import org.jackhuang.hmcl.task.Task;
-import org.jackhuang.hmcl.util.AutoTypingMap;
+import org.jackhuang.hmcl.task.TaskResult;
 import org.jackhuang.hmcl.util.function.ExceptionalFunction;
 
 /**
@@ -71,7 +71,7 @@ public class DefaultDependencyManager extends AbstractDependencyManager {
     @Override
     public Task checkGameCompletionAsync(Version version) {
         return new ParallelTask(
-                Task.ofThen(var -> {
+                Task.ofThen(() -> {
                     if (!repository.getVersionJar(version).exists())
                         return new GameDownloadTask(this, null, version);
                     else
@@ -88,36 +88,32 @@ public class DefaultDependencyManager extends AbstractDependencyManager {
     }
 
     @Override
-    public Task installLibraryAsync(String gameVersion, Version version, String libraryId, String libraryVersion) {
+    public TaskResult<Version> installLibraryAsync(String gameVersion, Version version, String libraryId, String libraryVersion) {
         VersionList<?> versionList = getVersionList(libraryId);
         return versionList.loadAsync(gameVersion, getDownloadProvider())
-                .then(variables -> installLibraryAsync(version, versionList.getVersion(gameVersion, libraryVersion)
+                .thenTaskResult(() -> installLibraryAsync(version, versionList.getVersion(gameVersion, libraryVersion)
                         .orElseThrow(() -> new IllegalStateException("Remote library " + libraryId + " has no version " + libraryVersion))));
     }
 
     @Override
-    public Task installLibraryAsync(Version version, RemoteVersion libraryVersion) {
+    public TaskResult<Version> installLibraryAsync(Version oldVersion, RemoteVersion libraryVersion) {
+        TaskResult<Version> task;
         if (libraryVersion instanceof ForgeRemoteVersion)
-            return new ForgeInstallTask(this, version, (ForgeRemoteVersion) libraryVersion)
+            task = new ForgeInstallTask(this, oldVersion, (ForgeRemoteVersion) libraryVersion);
-                    .then(variables -> new LibrariesUniqueTask(variables.get("version")))
-                    .then(variables -> new MaintainTask(variables.get("version")))
-                    .then(variables -> new VersionJsonSaveTask(repository, variables.get("version")));
         else if (libraryVersion instanceof LiteLoaderRemoteVersion)
-            return new LiteLoaderInstallTask(this, version, (LiteLoaderRemoteVersion) libraryVersion)
+            task = new LiteLoaderInstallTask(this, oldVersion, (LiteLoaderRemoteVersion) libraryVersion);
-                    .then(variables -> new LibrariesUniqueTask(variables.get("version")))
-                    .then(variables -> new MaintainTask(variables.get("version")))
-                    .then(variables -> new VersionJsonSaveTask(repository, variables.get("version")));
         else if (libraryVersion instanceof OptiFineRemoteVersion)
-            return new OptiFineInstallTask(this, version, (OptiFineRemoteVersion) libraryVersion)
+            task = new OptiFineInstallTask(this, oldVersion, (OptiFineRemoteVersion) libraryVersion);
-                    .then(variables -> new LibrariesUniqueTask(variables.get("version")))
-                    .then(variables -> new MaintainTask(variables.get("version")))
-                    .then(variables -> new VersionJsonSaveTask(repository, variables.get("version")));
         else
             throw new IllegalArgumentException("Remote library " + libraryVersion + " is unrecognized.");
+        return task
+                .thenTaskResult(LibrariesUniqueTask::new)
+                .thenTaskResult(MaintainTask::new)
+                .thenTaskResult(newVersion -> new VersionJsonSaveTask(repository, newVersion));
     }
 
 
-    public ExceptionalFunction<AutoTypingMap<String>, Task, ?> installLibraryAsync(RemoteVersion libraryVersion) {
+    public ExceptionalFunction<Version, TaskResult<Version>, ?> installLibraryAsync(RemoteVersion libraryVersion) {
-        return var -> installLibraryAsync(var.get("version"), libraryVersion);
+        return version -> installLibraryAsync(version, libraryVersion);
     }
 }

HMCLCore/src/main/java/org/jackhuang/hmcl/download/DefaultGameBuilder.java

@@ -21,6 +21,7 @@ import org.jackhuang.hmcl.download.game.*;
 import org.jackhuang.hmcl.game.Version;
 import org.jackhuang.hmcl.task.ParallelTask;
 import org.jackhuang.hmcl.task.Task;
+import org.jackhuang.hmcl.task.TaskResult;
 import org.jackhuang.hmcl.util.AutoTypingMap;
 import org.jackhuang.hmcl.util.function.ExceptionalFunction;
 import org.jackhuang.hmcl.util.gson.JsonUtils;
@@ -49,34 +50,35 @@ public class DefaultGameBuilder extends GameBuilder {
 
     @Override
     public Task buildAsync() {
-        return new VersionJsonDownloadTask(gameVersion, dependencyManager).then(variables -> {
+        return new VersionJsonDownloadTask(gameVersion, dependencyManager).thenTaskResult(rawJson -> {
-            Version version = JsonUtils.GSON.fromJson(variables.<String>get(VersionJsonDownloadTask.ID), Version.class);
+            Version original = JsonUtils.GSON.fromJson(rawJson, Version.class);
-            version = version.setId(name).setJar(null);
+            Version version = original.setId(name).setJar(null);
-            variables.set("version", version);
+            Task vanillaTask = downloadGameAsync(gameVersion, version).then(new ParallelTask(
-            Task result = downloadGameAsync(gameVersion, version).then(new ParallelTask(
                     new GameAssetDownloadTask(dependencyManager, version, GameAssetDownloadTask.DOWNLOAD_INDEX_FORCIBLY),
                     new GameLibrariesTask(dependencyManager, version) // Game libraries will be downloaded for multiple times partly, this time is for vanilla libraries.
             ).with(new VersionJsonSaveTask(dependencyManager.getGameRepository(), version))); // using [with] because download failure here are tolerant.
 
+            TaskResult<Version> libraryTask = vanillaTask.thenResult(() -> version);
+
             if (toolVersions.containsKey("forge"))
-                result = result.then(libraryTaskHelper(gameVersion, "forge"));
+                libraryTask = libraryTask.thenTaskResult(libraryTaskHelper(gameVersion, "forge"));
             if (toolVersions.containsKey("liteloader"))
-                result = result.then(libraryTaskHelper(gameVersion, "liteloader"));
+                libraryTask = libraryTask.thenTaskResult(libraryTaskHelper(gameVersion, "liteloader"));
             if (toolVersions.containsKey("optifine"))
-                result = result.then(libraryTaskHelper(gameVersion, "optifine"));
+                libraryTask = libraryTask.thenTaskResult(libraryTaskHelper(gameVersion, "optifine"));
 
             for (RemoteVersion remoteVersion : remoteVersions)
-                result = result.then(dependencyManager.installLibraryAsync(remoteVersion));
+                libraryTask = libraryTask.thenTaskResult(dependencyManager.installLibraryAsync(remoteVersion));
 
-            return result;
+            return libraryTask;
-        }).finalized((variables, isDependentsSucceeded, exception) -> {
+        }).finalized((isDependentsSucceeded, exception) -> {
             if (!isDependentsSucceeded)
                 dependencyManager.getGameRepository().getVersionRoot(name).delete();
         });
     }
 
-    private ExceptionalFunction<AutoTypingMap<String>, Task, ?> libraryTaskHelper(String gameVersion, String libraryId) {
+    private ExceptionalFunction<Version, TaskResult<Version>, ?> libraryTaskHelper(String gameVersion, String libraryId) {
-        return variables -> dependencyManager.installLibraryAsync(gameVersion, variables.get("version"), libraryId, toolVersions.get(libraryId));
+        return version -> dependencyManager.installLibraryAsync(gameVersion, version, libraryId, toolVersions.get(libraryId));
     }
 
     protected Task downloadGameAsync(String gameVersion, Version version) {

HMCLCore/src/main/java/org/jackhuang/hmcl/download/MaintainTask.java

@@ -23,15 +23,9 @@ import org.jackhuang.hmcl.task.TaskResult;
 public class MaintainTask extends TaskResult<Version> {
 
     private final Version version;
-    private final String id;
 
     public MaintainTask(Version version) {
-        this(version, ID);
-    }
-
-    public MaintainTask(Version version, String id) {
         this.version = version;
-        this.id = id;
     }
 
     @Override
@@ -76,11 +70,4 @@ public class MaintainTask extends TaskResult<Version> {
 
         return builder.build();
     }
-
-    @Override
-    public String getId() {
-        return id;
-    }
-
-    public static final String ID = "version";
 }

HMCLCore/src/main/java/org/jackhuang/hmcl/download/VersionList.java

@@ -74,7 +74,7 @@ public abstract class VersionList<T extends RemoteVersion> {
     }
 
     public Task loadAsync(DownloadProvider downloadProvider) {
-        return Task.ofThen(variables -> {
+        return Task.ofThen(() -> {
             lock.readLock().lock();
             boolean loaded;
 
@@ -88,7 +88,7 @@ public abstract class VersionList<T extends RemoteVersion> {
     }
 
     public Task loadAsync(String gameVersion, DownloadProvider downloadProvider) {
-        return Task.ofThen(variables -> {
+        return Task.ofThen(() -> {
             lock.readLock().lock();
             boolean loaded;
 

HMCLCore/src/main/java/org/jackhuang/hmcl/download/forge/ForgeInstallTask.java

@@ -82,11 +82,6 @@ public final class ForgeInstallTask extends TaskResult<Version> {
         return Collections.singleton(dependency);
     }
 
-    @Override
-    public String getId() {
-        return "version";
-    }
-
     @Override
     public boolean isRelyingOnDependencies() {
         return false;

HMCLCore/src/main/java/org/jackhuang/hmcl/download/forge/ForgeNewInstallTask.java

@@ -89,11 +89,6 @@ public class ForgeNewInstallTask extends TaskResult<Version> {
         return dependencies;
     }
 
-    @Override
-    public String getId() {
-        return "version";
-    }
-
     @Override
     public boolean doPreExecute() {
         return true;

HMCLCore/src/main/java/org/jackhuang/hmcl/download/forge/ForgeOldInstallTask.java

@@ -49,11 +49,6 @@ public class ForgeOldInstallTask extends TaskResult<Version> {
         return dependencies;
     }
 
-    @Override
-    public String getId() {
-        return "version";
-    }
-
     @Override
     public boolean doPreExecute() {
         return true;

HMCLCore/src/main/java/org/jackhuang/hmcl/download/game/LibrariesUniqueTask.java

@@ -33,15 +33,9 @@ import java.util.stream.Collectors;
 
 public class LibrariesUniqueTask extends TaskResult<Version> {
     private final Version version;
-    private final String id;
 
     public LibrariesUniqueTask(Version version) {
-        this(version, "version");
-    }
-
-    public LibrariesUniqueTask(Version version, String id) {
         this.version = version;
-        this.id = id;
     }
 
     @Override
@@ -99,9 +93,4 @@ public class LibrariesUniqueTask extends TaskResult<Version> {
 
         setResult(version.setLibraries(multimap.values().stream().sorted().collect(Collectors.toList())));
     }
-
-    @Override
-    public String getId() {
-        return id;
-    }
 }

HMCLCore/src/main/java/org/jackhuang/hmcl/download/game/LibraryDownloadTask.java

@@ -225,16 +225,16 @@ public class LibraryDownloadTask extends Task {
         int x = decompressed.length;
         int len = decompressed[(x - 8)] & 0xFF | (decompressed[(x - 7)] & 0xFF) << 8 | (decompressed[(x - 6)] & 0xFF) << 16 | (decompressed[(x - 5)] & 0xFF) << 24;
 
-        File temp = FileUtils.createTempFile("minecraft", ".pack");
+        Path temp = Files.createTempFile("minecraft", ".pack");
 
         byte[] checksums = Arrays.copyOfRange(decompressed, decompressed.length - len - 8, decompressed.length - 8);
 
-        OutputStream out = new FileOutputStream(temp);
+        try (OutputStream out = Files.newOutputStream(temp)) {
-        out.write(decompressed, 0, decompressed.length - len - 8);
+            out.write(decompressed, 0, decompressed.length - len - 8);
-        out.close();
+        }
 
         try (FileOutputStream jarBytes = new FileOutputStream(dest); JarOutputStream jos = new JarOutputStream(jarBytes)) {
-            Pack200.newUnpacker().unpack(temp, jos);
+            Pack200.newUnpacker().unpack(temp.toFile(), jos);
 
             JarEntry checksumsFile = new JarEntry("checksums.sha1");
             checksumsFile.setTime(0L);
@@ -243,6 +243,6 @@ public class LibraryDownloadTask extends Task {
             jos.closeEntry();
         }
 
-        temp.delete();
+        Files.delete(temp);
     }
 }

HMCLCore/src/main/java/org/jackhuang/hmcl/download/game/VersionJsonDownloadTask.java

@@ -22,6 +22,7 @@ import org.jackhuang.hmcl.download.RemoteVersion;
 import org.jackhuang.hmcl.download.VersionList;
 import org.jackhuang.hmcl.task.GetTask;
 import org.jackhuang.hmcl.task.Task;
+import org.jackhuang.hmcl.task.TaskResult;
 import org.jackhuang.hmcl.util.io.NetworkUtils;
 
 import java.util.Collection;
@@ -32,7 +33,7 @@ import java.util.List;
  *
  * @author huangyuhui
  */
-public final class VersionJsonDownloadTask extends Task {
+public final class VersionJsonDownloadTask extends TaskResult<String> {
     private final String gameVersion;
     private final DefaultDependencyManager dependencyManager;
     private final List<Task> dependents = new LinkedList<>();
@@ -65,8 +66,6 @@ public final class VersionJsonDownloadTask extends Task {
         RemoteVersion remoteVersion = gameVersionList.getVersions(gameVersion).stream().findFirst()
                 .orElseThrow(() -> new IllegalStateException("Cannot find specific version " + gameVersion + " in remote repository"));
         String jsonURL = dependencyManager.getDownloadProvider().injectURL(remoteVersion.getUrl());
-        dependencies.add(new GetTask(NetworkUtils.toURL(jsonURL), ID));
+        dependencies.add(new GetTask(NetworkUtils.toURL(jsonURL)).storeTo(this::setResult));
     }
-    
-    public static final String ID = "raw_version_json";
 }

HMCLCore/src/main/java/org/jackhuang/hmcl/download/game/VersionJsonSaveTask.java

@@ -19,7 +19,7 @@ package org.jackhuang.hmcl.download.game;
 
 import org.jackhuang.hmcl.game.DefaultGameRepository;
 import org.jackhuang.hmcl.game.Version;
-import org.jackhuang.hmcl.task.Task;
+import org.jackhuang.hmcl.task.TaskResult;
 import org.jackhuang.hmcl.util.gson.JsonUtils;
 import org.jackhuang.hmcl.util.io.FileUtils;
 
@@ -30,7 +30,7 @@ import java.io.File;
  *
  * @author huangyuhui
  */
-public final class VersionJsonSaveTask extends Task {
+public final class VersionJsonSaveTask extends TaskResult<Version> {
 
     private final DefaultGameRepository repository;
     private final Version version;
@@ -46,6 +46,7 @@ public final class VersionJsonSaveTask extends Task {
         this.version = version;
 
         setSignificance(TaskSignificance.MODERATE);
+        setResult(version);
     }
 
     @Override

HMCLCore/src/main/java/org/jackhuang/hmcl/download/liteloader/LiteLoaderInstallTask.java

@@ -18,7 +18,6 @@
 package org.jackhuang.hmcl.download.liteloader;
 
 import org.jackhuang.hmcl.download.DefaultDependencyManager;
-import org.jackhuang.hmcl.download.game.GameLibrariesTask;
 import org.jackhuang.hmcl.game.LibrariesDownloadInfo;
 import org.jackhuang.hmcl.game.Library;
 import org.jackhuang.hmcl.game.LibraryDownloadInfo;
@@ -61,11 +60,6 @@ public final class LiteLoaderInstallTask extends TaskResult<Version> {
         return dependencies;
     }
 
-    @Override
-    public String getId() {
-        return "version";
-    }
-
     @Override
     public void execute() {
         Library library = new Library(

HMCLCore/src/main/java/org/jackhuang/hmcl/download/optifine/OptiFineInstallTask.java

@@ -59,11 +59,6 @@ public final class OptiFineInstallTask extends TaskResult<Version> {
         return dependencies;
     }
 
-    @Override
-    public String getId() {
-        return "version";
-    }
-
     @Override
     public boolean isRelyingOnDependencies() {
         return false;

HMCLCore/src/main/java/org/jackhuang/hmcl/game/DefaultGameRepository.java

@@ -168,8 +168,8 @@ public class DefaultGameRepository implements GameRepository {
 
         versions.remove(id);
 
-        if (FileUtils.isMovingToTrashSupported()) {
+        if (FileUtils.isMovingToTrashSupported() && FileUtils.moveToTrash(removedFile)) {
-            return FileUtils.moveToTrash(removedFile);
+            return true;
         }
 
         // remove json files first to ensure HMCL will not recognize this folder as a valid version.

HMCLCore/src/main/java/org/jackhuang/hmcl/mod/ForgeModMetadata.java

@@ -23,7 +23,7 @@ import com.google.gson.reflect.TypeToken;
 import org.jackhuang.hmcl.util.*;
 import org.jackhuang.hmcl.util.gson.JsonUtils;
 import org.jackhuang.hmcl.util.io.CompressingUtils;
-import org.jackhuang.hmcl.util.io.IOUtils;
+import org.jackhuang.hmcl.util.io.FileUtils;
 
 import java.io.File;
 import java.io.IOException;
@@ -119,7 +119,7 @@ public final class ForgeModMetadata {
             Path mcmod = fs.getPath("mcmod.info");
             if (Files.notExists(mcmod))
                 throw new IOException("File " + modFile + " is not a Forge mod.");
-            List<ForgeModMetadata> modList = JsonUtils.GSON.fromJson(IOUtils.readFullyAsString(Files.newInputStream(mcmod)),
+            List<ForgeModMetadata> modList = JsonUtils.GSON.fromJson(FileUtils.readText(mcmod),
                     new TypeToken<List<ForgeModMetadata>>() {
                     }.getType());
             if (modList == null || modList.isEmpty())

HMCLCore/src/main/java/org/jackhuang/hmcl/mod/MultiMCModpackInstallTask.java

@@ -156,7 +156,7 @@ public final class MultiMCModpackInstallTask extends Task {
                 }
         }
 
-        dependencies.add(new MaintainTask(version).then(var -> new VersionJsonSaveTask(repository, var.get(MaintainTask.ID))));
+        dependencies.add(new MaintainTask(version).thenTaskResult(maintainedVersion -> new VersionJsonSaveTask(repository, maintainedVersion)));
         dependencies.add(new MinecraftInstanceTask<>(zipFile, modpack.getEncoding(), "/" + manifest.getName() + "/minecraft", manifest, MODPACK_TYPE, repository.getModpackConfiguration(name)));
     }
 

HMCLCore/src/main/java/org/jackhuang/hmcl/task/CoupleTask.java

@@ -18,57 +18,53 @@
 package org.jackhuang.hmcl.task;
 
 import org.jackhuang.hmcl.util.AutoTypingMap;
-import org.jackhuang.hmcl.util.function.ExceptionalFunction;
+import org.jackhuang.hmcl.util.function.ExceptionalSupplier;
 
 import java.util.Collection;
 import java.util.Collections;
-import java.util.LinkedList;
-import java.util.List;
 
 /**
  * A task that combines two tasks and make sure [pred] runs before succ.
  *
  * @author huangyuhui
  */
-final class CoupleTask<P extends Task> extends Task {
+final class CoupleTask extends Task {
 
     private final boolean relyingOnDependents;
-    private final Collection<Task> dependents;
+    private final Task pred;
-    private final List<Task> dependencies = new LinkedList<>();
+    private Task succ;
-    private final ExceptionalFunction<AutoTypingMap<String>, Task, ?> succ;
+    private final ExceptionalSupplier<Task, ?> supplier;
 
     /**
      * A task that combines two tasks and make sure pred runs before succ.
      *
-     * @param pred the task that runs before succ.
+     * @param pred the task that runs before supplier.
-     * @param succ a callback that returns the task runs after pred, succ will be executed asynchronously. You can do something that relies on the result of pred.
+     * @param supplier a callback that returns the task runs after pred, succ will be executed asynchronously. You can do something that relies on the result of pred.
      * @param relyingOnDependents true if this task chain will be broken when task pred fails.
      */
-    public CoupleTask(P pred, ExceptionalFunction<AutoTypingMap<String>, Task, ?> succ, boolean relyingOnDependents) {
+    CoupleTask(Task pred, ExceptionalSupplier<Task, ?> supplier, boolean relyingOnDependents) {
-        this.dependents = pred == null ? Collections.emptySet() : Collections.singleton(pred);
+        this.pred = pred;
-        this.succ = succ;
+        this.supplier = supplier;
         this.relyingOnDependents = relyingOnDependents;
 
         setSignificance(TaskSignificance.MODERATE);
-        setName(succ.toString());
+        setName(supplier.toString());
     }
 
     @Override
     public void execute() throws Exception {
-        setName(succ.toString());
+        setName(supplier.toString());
-        Task task = succ.apply(getVariables());
+        succ = supplier.get();
-        if (task != null)
-            dependencies.add(task);
     }
 
     @Override
     public Collection<Task> getDependents() {
-        return dependents;
+        return pred == null ? Collections.emptySet() : Collections.singleton(pred);
     }
 
     @Override
     public Collection<Task> getDependencies() {
-        return dependencies;
+        return succ == null ? Collections.emptySet() : Collections.singleton(succ);
     }
 
     @Override

HMCLCore/src/main/java/org/jackhuang/hmcl/task/FileDownloadTask.java

@@ -33,6 +33,7 @@ import java.io.RandomAccessFile;
 import java.math.BigInteger;
 import java.net.HttpURLConnection;
 import java.net.URL;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.security.MessageDigest;
 import java.util.Optional;
@@ -212,7 +213,7 @@ public class FileDownloadTask extends Task {
                 break;
             }
 
-            File temp = null;
+            Path temp = null;
 
             try {
                 updateProgress(0);
@@ -242,15 +243,15 @@ public class FileDownloadTask extends Task {
                 if (!FileUtils.makeDirectory(file.getAbsoluteFile().getParentFile()))
                     throw new IOException("Could not make directory " + file.getAbsoluteFile().getParent());
 
-                temp = FileUtils.createTempFile();
+                temp = Files.createTempFile(null, null);
-                rFile = new RandomAccessFile(temp, "rw");
+                rFile = new RandomAccessFile(temp.toFile(), "rw");
 
                 MessageDigest digest = integrityCheck == null ? null : integrityCheck.createDigest();
 
                 stream = con.getInputStream();
                 int lastDownloaded = 0, downloaded = 0;
                 long lastTime = System.currentTimeMillis();
-                byte buffer[] = new byte[IOUtils.DEFAULT_BUFFER_SIZE];
+                byte[] buffer = new byte[IOUtils.DEFAULT_BUFFER_SIZE];
                 while (true) {
                     if (Thread.interrupted()) {
                         Thread.currentThread().interrupt();
@@ -283,16 +284,15 @@ public class FileDownloadTask extends Task {
 
                 // Restore temp file to original name.
                 if (Thread.interrupted()) {
-                    temp.delete();
+                    temp.toFile().delete();
                     Thread.currentThread().interrupt();
                     break;
                 } else {
-                    if (file.exists() && !file.delete())
+                    Files.deleteIfExists(file.toPath());
-                        throw new IOException("Unable to delete existent file " + file);
                     if (!FileUtils.makeDirectory(file.getAbsoluteFile().getParentFile()))
                         throw new IOException("Unable to make parent directory " + file);
                     try {
-                        FileUtils.moveFile(temp, file);
+                        FileUtils.moveFile(temp.toFile(), file);
                     } catch (Exception e) {
                         throw new IOException("Unable to move temp file from " + temp + " to " + file, e);
                     }
@@ -321,7 +321,7 @@ public class FileDownloadTask extends Task {
                 return;
             } catch (IOException | IllegalStateException e) {
                 if (temp != null)
-                    temp.delete();
+                    temp.toFile().delete();
                 exception = e;
             } finally {
                 closeFiles();

HMCLCore/src/main/java/org/jackhuang/hmcl/task/FinalizedCallback.java

@@ -1,24 +0,0 @@
-/*
- * Hello Minecraft! Launcher
- * Copyright (C) 2019  huangyuhui <huanghongxun2008@126.com> and contributors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-package org.jackhuang.hmcl.task;
-
-import org.jackhuang.hmcl.util.AutoTypingMap;
-
-public interface FinalizedCallback {
-    void execute(AutoTypingMap<String> variables, boolean isDependentsSucceeded, Exception exception) throws Exception;
-}

HMCLCore/src/main/java/org/jackhuang/hmcl/task/FinalizedTask.java

@@ -37,13 +37,12 @@ final class FinalizedTask extends Task {
      * @param pred the task that runs before succ.
      * @param callback a callback that returns the task runs after pred, succ will be executed asynchronously. You can do something that relies on the result of pred.
      */
-    public FinalizedTask(Task pred, Scheduler scheduler, FinalizedCallback callback, String name) {
+    public FinalizedTask(Task pred, Scheduler scheduler, FinalizedCallback callback) {
         this.pred = pred;
         this.scheduler = scheduler;
         this.callback = callback;
 
         setSignificance(TaskSignificance.MODERATE);
-        setName(name);
     }
 
     @Override
@@ -53,7 +52,7 @@ final class FinalizedTask extends Task {
 
     @Override
     public void execute() throws Exception {
-        callback.execute(getVariables(), isDependentsSucceeded(), pred.getLastException());
+        callback.execute(isDependentsSucceeded(), pred.getLastException());
 
         if (!isDependentsSucceeded())
             throw new SilentException();

HMCLCore/src/main/java/org/jackhuang/hmcl/task/GetTask.java

@@ -72,11 +72,6 @@ public final class GetTask extends TaskResult<String> {
         return Schedulers.io();
     }
 
-    @Override
-    public String getId() {
-        return id;
-    }
-
     public GetTask setCacheRepository(CacheRepository repository) {
         this.repository = repository;
         return this;

HMCLCore/src/main/java/org/jackhuang/hmcl/task/SimpleTask.java

@@ -17,8 +17,7 @@
  */
 package org.jackhuang.hmcl.task;
 
-import org.jackhuang.hmcl.util.AutoTypingMap;
+import org.jackhuang.hmcl.util.function.ExceptionalRunnable;
-import org.jackhuang.hmcl.util.function.ExceptionalConsumer;
 
 /**
  *
@@ -26,16 +25,16 @@ import org.jackhuang.hmcl.util.function.ExceptionalConsumer;
  */
 class SimpleTask extends Task {
 
-    private final ExceptionalConsumer<AutoTypingMap<String>, ?> consumer;
+    private final ExceptionalRunnable<?> closure;
     private final Scheduler scheduler;
 
-    public SimpleTask(String name, ExceptionalConsumer<AutoTypingMap<String>, ?> consumer, Scheduler scheduler) {
+    public SimpleTask(String name, ExceptionalRunnable<?> closure, Scheduler scheduler) {
-        this.consumer = consumer;
+        this.closure = closure;
         this.scheduler = scheduler;
 
         if (name == null) {
             setSignificance(TaskSignificance.MINOR);
-            setName(consumer.toString());
+            setName(closure.toString());
         } else {
             setName(name);
         }
@@ -48,6 +47,6 @@ class SimpleTask extends Task {
 
     @Override
     public void execute() throws Exception {
-        consumer.accept(getVariables());
+        closure.run();
     }
 }

HMCLCore/src/main/java/org/jackhuang/hmcl/task/SimpleTaskResult.java

@@ -17,24 +17,30 @@
  */
 package org.jackhuang.hmcl.task;
 
+import org.jackhuang.hmcl.util.AutoTypingMap;
+import org.jackhuang.hmcl.util.function.ExceptionalFunction;
 import org.jackhuang.hmcl.util.function.ExceptionalSupplier;
 
-public final class SimpleTaskResult<V> extends TaskResult<V> {
+import java.util.concurrent.Callable;
-    private final String id;
-    private final ExceptionalSupplier<V, ?> supplier;
 
-    public SimpleTaskResult(String id, ExceptionalSupplier<V, ?> supplier) {
+/**
-        this.id = id;
+ *
-        this.supplier = supplier;
+ * @author huangyuhui
+ */
+class SimpleTaskResult<V> extends TaskResult<V> {
+
+    private final Callable<V> callable;
+
+    public SimpleTaskResult(Callable<V> callable) {
+        this.callable = callable;
+    }
+
+    public SimpleTaskResult(ExceptionalSupplier<V, ?> supplier) {
+        this.callable = supplier.toCallable();
     }
 
     @Override
     public void execute() throws Exception {
-        setResult(supplier.get());
+        setResult(callable.call());
-    }
-
-    @Override
-    public String getId() {
-        return id;
     }
 }

HMCLCore/src/main/java/org/jackhuang/hmcl/task/Task.java

@@ -23,13 +23,12 @@ import javafx.beans.property.ReadOnlyDoubleWrapper;
 import javafx.beans.property.ReadOnlyStringProperty;
 import javafx.beans.property.ReadOnlyStringWrapper;
 import org.jackhuang.hmcl.event.EventManager;
-import org.jackhuang.hmcl.util.AutoTypingMap;
 import org.jackhuang.hmcl.util.InvocationDispatcher;
 import org.jackhuang.hmcl.util.Logging;
 import org.jackhuang.hmcl.util.ReflectionHelper;
 import org.jackhuang.hmcl.util.function.ExceptionalConsumer;
-import org.jackhuang.hmcl.util.function.ExceptionalFunction;
 import org.jackhuang.hmcl.util.function.ExceptionalRunnable;
+import org.jackhuang.hmcl.util.function.ExceptionalSupplier;
 
 import java.util.Collection;
 import java.util.Collections;
@@ -134,16 +133,6 @@ public abstract class Task {
         return this;
     }
 
-    private AutoTypingMap<String> variables = null;
-
-    public AutoTypingMap<String> getVariables() {
-        return variables;
-    }
-
-    void setVariables(AutoTypingMap<String> variables) {
-        this.variables = variables;
-    }
-
     public boolean doPreExecute() {
         return false;
     }
@@ -280,16 +269,8 @@ public abstract class Task {
         new TaskExecutor(then(subscriber)).start();
     }
 
-    public final void subscribe(Scheduler scheduler, ExceptionalConsumer<AutoTypingMap<String>, ?> closure) {
-        subscribe(of(scheduler, closure));
-    }
-
     public final void subscribe(Scheduler scheduler, ExceptionalRunnable<?> closure) {
-        subscribe(of(scheduler, ExceptionalConsumer.fromRunnable(closure)));
+        subscribe(of(scheduler, closure));
-    }
-
-    public final void subscribe(ExceptionalConsumer<AutoTypingMap<String>, ?> closure) {
-        subscribe(of(closure));
     }
 
     public final void subscribe(ExceptionalRunnable<?> closure) {
@@ -300,16 +281,41 @@ public abstract class Task {
         return then(convert(b));
     }
 
-    public final Task then(ExceptionalFunction<AutoTypingMap<String>, Task, ?> b) {
+    public final Task then(ExceptionalSupplier<Task, ?> b) {
-        return new CoupleTask<>(this, b, true);
+        return new CoupleTask(this, b, true);
+    }
+
+    public final <R> TaskResult<R> thenResult(Callable<R> supplier) {
+        return thenTaskResult(() -> Task.ofResult(supplier));
+    }
+
+    public final <R> TaskResult<R> thenTaskResult(ExceptionalSupplier<TaskResult<R>, ?> taskSupplier) {
+        return new TaskResult<R>() {
+            TaskResult<R> then;
+
+            @Override
+            public Collection<? extends Task> getDependents() {
+                return Collections.singleton(Task.this);
+            }
+
+            @Override
+            public void execute() throws Exception {
+                then = taskSupplier.get().storeTo(this::setResult);
+            }
+
+            @Override
+            public Collection<? extends Task> getDependencies() {
+                return then == null ? Collections.emptyList() : Collections.singleton(then);
+            }
+        };
     }
 
     public final Task with(Task b) {
         return with(convert(b));
     }
 
-    public final <E extends Exception> Task with(ExceptionalFunction<AutoTypingMap<String>, Task, E> b) {
+    public final <E extends Exception> Task with(ExceptionalSupplier<Task, E> b) {
-        return new CoupleTask<>(this, b, false);
+        return new CoupleTask(this, b, false);
     }
 
     public final Task finalized(FinalizedCallback b) {
@@ -317,15 +323,16 @@ public abstract class Task {
     }
 
     public final Task finalized(Scheduler scheduler, FinalizedCallback b) {
-        return new FinalizedTask(this, scheduler, b, ReflectionHelper.getCaller().toString());
+        return new FinalizedTask(this, scheduler, b).setName(getCaller());
     }
 
-    public final <T extends Exception, K extends Exception> Task finalized(Scheduler scheduler, ExceptionalConsumer<AutoTypingMap<String>, T> success, ExceptionalConsumer<Exception, K> failure) {
+    // T, K here is necessary, or javac cannot infer type of failure
-        return finalized(scheduler, (variables, isDependentsSucceeded, exception) -> {
+    public final <T extends Exception, K extends Exception> Task finalized(Scheduler scheduler, ExceptionalRunnable<T> success, ExceptionalConsumer<Exception, K> failure) {
+        return finalized(scheduler, (isDependentsSucceeded, exception) -> {
             if (isDependentsSucceeded) {
                 if (success != null)
                     try {
-                        success.accept(variables);
+                        success.run();
                     } catch (Exception e) {
                         Logging.LOG.log(Level.WARNING, "Failed to execute " + success, e);
                         if (failure != null)
@@ -338,58 +345,38 @@ public abstract class Task {
         });
     }
 
-    public static Task of(String name, ExceptionalRunnable<?> runnable) {
+    public static Task of(ExceptionalRunnable<?> closure) {
-        return of(name, ExceptionalConsumer.fromRunnable(runnable));
-    }
-
-    public static Task of(ExceptionalRunnable<?> runnable) {
-        return of(ExceptionalConsumer.fromRunnable(runnable));
-    }
-
-    public static Task of(String name, ExceptionalConsumer<AutoTypingMap<String>, ?> closure) {
-        return of(name, Schedulers.defaultScheduler(), closure);
-    }
-
-    public static Task of(ExceptionalConsumer<AutoTypingMap<String>, ?> closure) {
         return of(Schedulers.defaultScheduler(), closure);
     }
 
-    public static Task of(String name, Scheduler scheduler, ExceptionalConsumer<AutoTypingMap<String>, ?> closure) {
+    public static Task of(String name, ExceptionalRunnable<?> closure) {
-        return new SimpleTask(name, closure, scheduler);
+        return of(name, Schedulers.defaultScheduler(), closure);
-    }
-
-    public static Task of(Scheduler scheduler, ExceptionalConsumer<AutoTypingMap<String>, ?> closure) {
-        return of(ReflectionHelper.getCaller().toString(), scheduler, closure);
-    }
-
-    public static Task of(String name, Scheduler scheduler, ExceptionalRunnable<?> closure) {
-        return new SimpleTask(name, ExceptionalConsumer.fromRunnable(closure), scheduler);
     }
 
     public static Task of(Scheduler scheduler, ExceptionalRunnable<?> closure) {
-        return of(ReflectionHelper.getCaller().toString(), scheduler, closure);
+        return of(getCaller(), scheduler, closure);
     }
 
-    public static Task ofThen(ExceptionalFunction<AutoTypingMap<String>, Task, ?> b) {
+    public static Task of(String name, Scheduler scheduler, ExceptionalRunnable<?> closure) {
-        return new CoupleTask<>(null, b, true);
+        return new SimpleTask(name, closure, scheduler);
+    }
+
+    public static Task ofThen(ExceptionalSupplier<Task, ?> b) {
+        return new CoupleTask(null, b, true);
     }
 
     public static <V> TaskResult<V> ofResult(Callable<V> callable) {
-        return ofResult("", callable);
+        return ofResult(getCaller(), callable);
     }
 
-    public static <V> TaskResult<V> ofResult(String id, Callable<V> callable) {
+    public static <V> TaskResult<V> ofResult(String name, Callable<V> callable) {
-        return new TaskCallable<>(id, callable);
+        return new SimpleTaskResult<>(callable).setName(name);
     }
 
-    public static <V> TaskResult<V> ofResult(String id, ExceptionalFunction<AutoTypingMap<String>, V, ?> closure) {
+    private static ExceptionalSupplier<Task, ?> convert(Task t) {
-        return new TaskCallable<>(id, closure);
+        return new ExceptionalSupplier<Task, Exception>() {
-    }
-
-    private static ExceptionalFunction<AutoTypingMap<String>, Task, ?> convert(Task t) {
-        return new ExceptionalFunction<AutoTypingMap<String>, Task, Exception>() {
             @Override
-            public Task apply(AutoTypingMap<String> autoTypingMap) {
+            public Task get() {
                 return t;
             }
 
@@ -421,4 +408,12 @@ public abstract class Task {
         SUCCEEDED,
         FAILED
     }
+
+    public interface FinalizedCallback {
+        void execute(boolean isDependentsSucceeded, Exception exception) throws Exception;
+    }
+
+    static String getCaller() {
+        return ReflectionHelper.getCaller(packageName -> !"org.jackhuang.hmcl.task".equals(packageName)).toString();
+    }
 }

HMCLCore/src/main/java/org/jackhuang/hmcl/task/TaskCallable.java

@@ -1,52 +0,0 @@
-/*
- * Hello Minecraft! Launcher
- * Copyright (C) 2019  huangyuhui <huanghongxun2008@126.com> and contributors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-package org.jackhuang.hmcl.task;
-
-import org.jackhuang.hmcl.util.AutoTypingMap;
-import org.jackhuang.hmcl.util.function.ExceptionalFunction;
-
-import java.util.concurrent.Callable;
-
-/**
- *
- * @author huangyuhui
- */
-class TaskCallable<V> extends TaskResult<V> {
-
-    private final String id;
-    private final ExceptionalFunction<AutoTypingMap<String>, V, ?> callable;
-
-    public TaskCallable(String id, Callable<V> callable) {
-        this(id, variables -> callable.call());
-    }
-
-    public TaskCallable(String id, ExceptionalFunction<AutoTypingMap<String>, V, ?> callable) {
-        this.id = id;
-        this.callable = callable;
-    }
-
-    @Override
-    public String getId() {
-        return id;
-    }
-
-    @Override
-    public void execute() throws Exception {
-        setResult(callable.apply(getVariables()));
-    }
-}

HMCLCore/src/main/java/org/jackhuang/hmcl/task/TaskExecutor.java

@@ -38,7 +38,6 @@ public final class TaskExecutor {
     private Exception lastException;
     private final AtomicInteger totTask = new AtomicInteger(0);
     private final ConcurrentLinkedQueue<Future<?>> workerQueue = new ConcurrentLinkedQueue<>();
-    private final AutoTypingMap<String> variables = new AutoTypingMap<>(new HashMap<>());
     private Scheduler scheduler = Schedulers.newThread();
 
     public TaskExecutor(Task task) {
@@ -147,8 +146,6 @@ public final class TaskExecutor {
         boolean flag = false;
 
         try {
-            task.setVariables(variables);
-
             if (task.doPreExecute()) {
                 try {
                     task.getScheduler().schedule(task::preExecute).get();
@@ -186,11 +183,6 @@ public final class TaskExecutor {
                 task.setState(Task.TaskState.EXECUTED);
             }
 
-            if (task instanceof TaskResult<?>) {
-                TaskResult<?> taskResult = (TaskResult<?>) task;
-                variables.set(taskResult.getId(), taskResult.getResult());
-            }
-
             Collection<? extends Task> dependencies = task.getDependencies();
             boolean doDependenciesSucceeded = executeTasks(dependencies);
             Exception dependenciesException = dependencies.stream().map(Task::getLastException).filter(Objects::nonNull).findAny().orElse(null);
@@ -238,8 +230,6 @@ public final class TaskExecutor {
             }
             task.onDone().fireEvent(new TaskEvent(this, task, true));
             taskListeners.forEach(it -> it.onFailed(task, e));
-        } finally {
-            task.setVariables(null);
         }
         task.setState(flag ? Task.TaskState.SUCCEEDED : Task.TaskState.FAILED);
         return flag;
@@ -249,10 +239,6 @@ public final class TaskExecutor {
         return totTask.get();
     }
 
-    public AutoTypingMap<String> getVariables() {
-        return variables;
-    }
-
     private class Invoker implements ExceptionalRunnable<Exception> {
 
         private final Task task;

HMCLCore/src/main/java/org/jackhuang/hmcl/task/TaskResult.java

@@ -17,12 +17,12 @@
  */
 package org.jackhuang.hmcl.task;
 
-import org.jackhuang.hmcl.util.ReflectionHelper;
 import org.jackhuang.hmcl.util.function.ExceptionalConsumer;
 import org.jackhuang.hmcl.util.function.ExceptionalFunction;
 
 import java.util.Collection;
 import java.util.Collections;
+import java.util.function.Consumer;
 
 /**
  * A task that has a result.
@@ -32,6 +32,13 @@ import java.util.Collections;
 public abstract class TaskResult<V> extends Task {
 
     private V result;
+    private Consumer<V> resultConsumer;
+
+    @Override
+    public TaskResult<V> setName(String name) {
+        super.setName(name);
+        return this;
+    }
 
     public V getResult() {
         return result;
@@ -39,41 +46,78 @@ public abstract class TaskResult<V> extends Task {
 
     public void setResult(V result) {
         this.result = result;
+        if (resultConsumer != null)
+            resultConsumer.accept(result);
     }
 
-    public abstract String getId();
+    public TaskResult<V> storeTo(Consumer<V> resultConsumer) {
+        this.resultConsumer = resultConsumer;
+        return this;
+    }
+
+    public <R, E extends Exception> TaskResult<R> thenTaskResult(ExceptionalFunction<V, TaskResult<R>, E> taskSupplier) {
+        return new TaskResult<R>() {
+            TaskResult<R> then;
+
+            @Override
+            public Collection<? extends Task> getDependents() {
+                return Collections.singleton(TaskResult.this);
+            }
+
+            @Override
+            public void execute() throws Exception {
+                then = taskSupplier.apply(TaskResult.this.getResult()).storeTo(this::setResult);
+            }
+
+            @Override
+            public Collection<? extends Task> getDependencies() {
+                return then == null ? Collections.emptyList() : Collections.singleton(then);
+            }
+        };
+    }
+
+    public <R, E extends Exception> Task then(ExceptionalFunction<V, Task, E> taskSupplier) {
+        return new CoupleTask(this, () -> taskSupplier.apply(getResult()), true);
+    }
 
     public <R, E extends Exception> TaskResult<R> thenResult(ExceptionalFunction<V, R, E> task) {
         return thenResult(Schedulers.defaultScheduler(), task);
     }
 
     public <R, E extends Exception> TaskResult<R> thenResult(Scheduler scheduler, ExceptionalFunction<V, R, E> task) {
-        return thenResult(ReflectionHelper.getCaller().toString(), scheduler, task);
+        return thenResult(getCaller(), scheduler, task);
     }
 
-    public <R, E extends Exception> TaskResult<R> thenResult(String id, Scheduler scheduler, ExceptionalFunction<V, R, E> task) {
+    public <R, E extends Exception> TaskResult<R> thenResult(String name, Scheduler scheduler, ExceptionalFunction<V, R, E> task) {
-        return new Subtask<>(id, scheduler, task);
+        return new Subtask<>(name, scheduler, task);
     }
 
-    public <T extends Exception, K extends Exception> Task finalizedResult(Scheduler scheduler, ExceptionalConsumer<V, T> success, ExceptionalConsumer<Exception, K> failure) {
+    // stupid javac stop us from renaming thenVoid to thenResult
-        return finalized(scheduler, variables -> success.accept(getResult()), failure);
+    public <E extends Exception> Task thenVoid(ExceptionalConsumer<V, E> task) {
+        return thenVoid(Schedulers.defaultScheduler(), task);
     }
 
-    public Task finalizedResult(Scheduler scheduler, FinalizedCallback<V> callback) {
+    public <E extends Exception> Task thenVoid(Scheduler scheduler, ExceptionalConsumer<V, E> task) {
-        return new FinalizedTask(this, scheduler,
+        return new CoupleTask(this, () -> Task.of(scheduler, () -> task.accept(getResult())), true);
-                (variables, isDependentsSucceeded, exception) -> callback.execute(getResult(), isDependentsSucceeded, exception),
+    }
-                ReflectionHelper.getCaller().toString());
+
+    public <T extends Exception, K extends Exception> Task finalized(Scheduler scheduler, ExceptionalConsumer<V, T> success, ExceptionalConsumer<Exception, K> failure) {
+        return finalized(scheduler, () -> success.accept(getResult()), failure);
+    }
+
+    public Task finalized(Scheduler scheduler, FinalizedCallback<V> callback) {
+        return finalized(scheduler, ((isDependentsSucceeded, exception) -> callback.execute(getResult(), isDependentsSucceeded, exception)));
     }
 
     private class Subtask<R> extends TaskResult<R> {
-        private final String id;
         private final Scheduler scheduler;
         private final ExceptionalFunction<V, R, ?> callable;
 
-        public Subtask(String id, Scheduler scheduler, ExceptionalFunction<V, R, ?> callable) {
+        public Subtask(String name, Scheduler scheduler, ExceptionalFunction<V, R, ?> callable) {
-            this.id = id;
             this.scheduler = scheduler;
             this.callable = callable;
+
+            setName(name);
         }
 
         @Override
@@ -81,11 +125,6 @@ public abstract class TaskResult<V> extends Task {
             return Collections.singleton(TaskResult.this);
         }
 
-        @Override
-        public String getId() {
-            return id;
-        }
-
         @Override
         public Scheduler getScheduler() {
             return scheduler;

HMCLCore/src/main/java/org/jackhuang/hmcl/util/ReflectionHelper.java

@@ -17,17 +17,28 @@
  */
 package org.jackhuang.hmcl.util;
 
+import java.util.function.Predicate;
+
 /**
  *
  * @author huangyuhui
  */
 public final class ReflectionHelper {
 
-    public static StackTraceElement getCaller() {
+    /**
+     * Get caller, this method is caller sensitive.
+     * @param packageFilter returns false if we consider the given package is internal calls, not the caller
+     * @return the caller, method name, source file, line number
+     */
+    public static StackTraceElement getCaller(Predicate<String> packageFilter) {
         StackTraceElement[] elements = Thread.currentThread().getStackTrace();
+        // element[0] is Thread.currentThread().getStackTrace()
+        // element[1] is ReflectionHelper.getCaller(packageFilter)
+        // so element[2] is caller of this method.
         StackTraceElement caller = elements[2];
         for (int i = 3; i < elements.length; ++i) {
-            if (!caller.getClassName().equals(elements[i].getClassName()))
+            if (packageFilter.test(StringUtils.substringBeforeLast(elements[i].getClassName(), '.')) &&
+                    !caller.getClassName().equals(elements[i].getClassName()))
                 return elements[i];
         }
         return caller;

HMCLCore/src/main/java/org/jackhuang/hmcl/util/io/FileUtils.java

@@ -116,14 +116,43 @@ public final class FileUtils {
         return new String(Files.readAllBytes(file), charset);
     }
 
+    /**
+     * Write plain text to file. Characters are encoded into bytes using UTF-8.
+     *
+     * We don't care about platform difference of line separator. Because readText accept all possibilities of line separator.
+     * It will create the file if it does not exist, or truncate the existing file to empty for rewriting.
+     * All characters in text will be written into the file in binary format. Existing data will be erased.
+     * @param file the path to the file
+     * @param text the text being written to file
+     * @throws IOException if an I/O error occurs
+     */
     public static void writeText(File file, String text) throws IOException {
         writeText(file, text, UTF_8);
     }
 
+    /**
+     * Write plain text to file.
+     *
+     * We don't care about platform difference of line separator. Because readText accept all possibilities of line separator.
+     * It will create the file if it does not exist, or truncate the existing file to empty for rewriting.
+     * All characters in text will be written into the file in binary format. Existing data will be erased.
+     * @param file the path to the file
+     * @param text the text being written to file
+     * @param charset the charset to use for encoding
+     * @throws IOException if an I/O error occurs
+     */
     public static void writeText(File file, String text, Charset charset) throws IOException {
         writeBytes(file, text.getBytes(charset));
     }
 
+    /**
+     * Write byte array to file.
+     * It will create the file if it does not exist, or truncate the existing file to empty for rewriting.
+     * All bytes in byte array will be written into the file in binary format. Existing data will be erased.
+     * @param file the path to the file
+     * @param array the data being written to file
+     * @throws IOException if an I/O error occurs
+     */
     public static void writeBytes(File file, byte[] array) throws IOException {
         Files.createDirectories(file.toPath().getParent());
         Files.write(file.toPath(), array);
@@ -153,6 +182,14 @@ public final class FileUtils {
         }
     }
 
+    /**
+     * Copy directory.
+     * Paths of all files relative to source directory will be the same as the ones relative to destination directory.
+     *
+     * @param src the source directory.
+     * @param dest the destination directory, which will be created if not existing.
+     * @throws IOException if an I/O error occurs.
+     */
     public static void copyDirectory(Path src, Path dest) throws IOException {
         Files.walkFileTree(src, new SimpleFileVisitor<Path>(){
             @Override
@@ -173,6 +210,20 @@ public final class FileUtils {
         });
     }
 
+    /**
+     * Move file to trash.
+     *
+     * This method is only implemented in Java 9. Please check we are using Java 9 by invoking isMovingToTrashSupported.
+     * Example:
+     * <pre>{@code
+     * if (FileUtils.isMovingToTrashSupported()) {
+     *     FileUtils.moveToTrash(file);
+     * }
+     * }</pre>
+     * @param file the file being moved to trash.
+     * @see FileUtils#isMovingToTrashSupported()
+     * @return false if moveToTrash does not exist, or platform does not support Desktop.Action.MOVE_TO_TRASH
+     */
     public static boolean moveToTrash(File file) {
         try {
             java.awt.Desktop desktop = java.awt.Desktop.getDesktop();
@@ -314,20 +365,4 @@ public final class FileUtils {
                     result.add(it);
         return result;
     }
-
-    public static File createTempFile() throws IOException {
-        return createTempFile("tmp");
-    }
-
-    public static File createTempFile(String prefix) throws IOException {
-        return createTempFile(prefix, null);
-    }
-
-    public static File createTempFile(String prefix, String suffix) throws IOException {
-        return createTempFile(prefix, suffix, null);
-    }
-
-    public static File createTempFile(String prefix, String suffix, File directory) throws IOException {
-        return File.createTempFile(prefix, suffix, directory);
-    }
 }

HMCLCore/src/main/java/org/jackhuang/hmcl/util/io/IOUtils.java

@@ -21,8 +21,9 @@ import java.io.*;
 import java.nio.charset.Charset;
 
 /**
+ * This utility class consists of some util methods operating on InputStream/OutputStream.
  *
- * @author huang
+ * @author huangyuhui
  */
 public final class IOUtils {
 
@@ -31,12 +32,26 @@ public final class IOUtils {
 
     public static final int DEFAULT_BUFFER_SIZE = 8 * 1024;
 
+    /**
+     * Read all bytes to a buffer from given input stream. The stream will not be closed.
+     *
+     * @param stream the InputStream being read.
+     * @return all bytes read from the stream
+     * @throws IOException if an I/O error occurs.
+     */
     public static byte[] readFullyWithoutClosing(InputStream stream) throws IOException {
         ByteArrayOutputStream result = new ByteArrayOutputStream();
         copyTo(stream, result);
         return result.toByteArray();
     }
 
+    /**
+     * Read all bytes to a buffer from given input stream, and close the input stream finally.
+     *
+     * @param stream the InputStream being read, closed finally.
+     * @return all bytes read from the stream
+     * @throws IOException if an I/O error occurs.
+     */
     public static ByteArrayOutputStream readFully(InputStream stream) throws IOException {
         try (InputStream is = stream) {
             ByteArrayOutputStream result = new ByteArrayOutputStream();