feat: WIP auto choose download source.

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

@@ -0,0 +1,59 @@
+/*
+ * Hello Minecraft! Launcher
+ * Copyright (C) 2021  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.download;
+
+/**
+ * Official Download Provider fetches version list from Mojang and
+ * download files from mcbbs.
+ *
+ * @author huangyuhui
+ */
+public class AutoDownloadProvider implements DownloadProvider {
+    private final DownloadProvider versionListProvider;
+    private final DownloadProvider fileProvider;
+
+    public AutoDownloadProvider(DownloadProvider versionListProvider, DownloadProvider fileProvider) {
+        this.versionListProvider = versionListProvider;
+        this.fileProvider = fileProvider;
+    }
+
+    @Override
+    public String getVersionListURL() {
+        return versionListProvider.getVersionListURL();
+    }
+
+    @Override
+    public String getAssetBaseURL() {
+        return fileProvider.getAssetBaseURL();
+    }
+
+    @Override
+    public String injectURL(String baseURL) {
+        return fileProvider.injectURL(baseURL);
+    }
+
+    @Override
+    public VersionList<?> getVersionListById(String id) {
+        return versionListProvider.getVersionListById(id);
+    }
+
+    @Override
+    public int getConcurrency() {
+        return fileProvider.getConcurrency();
+    }
+}

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

@@ -0,0 +1,52 @@
+/*
+ * Hello Minecraft! Launcher
+ * Copyright (C) 2021  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.download;
+
+/**
+ * Official Download Provider fetches version list from Mojang and
+ * download files from mcbbs.
+ *
+ * @author huangyuhui
+ */
+public class BalancedDownloadProvider implements DownloadProvider {
+
+    @Override
+    public String getVersionListURL() {
+        return null;
+    }
+
+    @Override
+    public String getAssetBaseURL() {
+        return null;
+    }
+
+    @Override
+    public String injectURL(String baseURL) {
+        return null;
+    }
+
+    @Override
+    public VersionList<?> getVersionListById(String id) {
+        return null;
+    }
+
+    @Override
+    public int getConcurrency() {
+        return 0;
+    }
+}

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

@@ -0,0 +1,21 @@
+/*
+ * Hello Minecraft! Launcher
+ * Copyright (C) 2021  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.download;
+
+public class MultipleSourceVersionList {
+}