修复切换下载源后需要重启启动器才会生效的问题 (#4296)

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

@@ -17,8 +17,9 @@
  */
 package org.jackhuang.hmcl.download;
 
+import org.jetbrains.annotations.Unmodifiable;
+
 import java.net.URI;
-import java.util.ArrayList;
 import java.util.List;
 import java.util.stream.Collectors;
 
@@ -29,10 +30,10 @@ import java.util.stream.Collectors;
  */
 public class AdaptedDownloadProvider implements DownloadProvider {
 
-    private List<DownloadProvider> downloadProviderCandidates;
+    private @Unmodifiable List<DownloadProvider> downloadProviderCandidates;
 
     public void setDownloadProviderCandidates(List<DownloadProvider> downloadProviderCandidates) {
-        this.downloadProviderCandidates = new ArrayList<>(downloadProviderCandidates);
+        this.downloadProviderCandidates = List.copyOf(downloadProviderCandidates);
     }
 
     public DownloadProvider getPreferredDownloadProvider() {

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

@@ -0,0 +1,82 @@
+/*
+ * Hello Minecraft! Launcher
+ * Copyright (C) 2025 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;
+
+import java.net.URI;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * @author Glavo
+ */
+public final class DownloadProviderWrapper implements DownloadProvider {
+
+    private DownloadProvider provider;
+
+    public DownloadProviderWrapper(DownloadProvider provider) {
+        this.provider = provider;
+    }
+
+    public DownloadProvider getProvider() {
+        return this.provider;
+    }
+
+    public void setProvider(DownloadProvider provider) {
+        this.provider = Objects.requireNonNull(provider);
+    }
+
+    @Override
+    public List<URI> getAssetObjectCandidates(String assetObjectLocation) {
+        return getProvider().getAssetObjectCandidates(assetObjectLocation);
+    }
+
+    @Override
+    public String getVersionListURL() {
+        return getProvider().getVersionListURL();
+    }
+
+    @Override
+    public String getAssetBaseURL() {
+        return getProvider().getAssetBaseURL();
+    }
+
+    @Override
+    public String injectURL(String baseURL) {
+        return getProvider().injectURL(baseURL);
+    }
+
+    @Override
+    public List<URI> injectURLWithCandidates(String baseURL) {
+        return getProvider().injectURLWithCandidates(baseURL);
+    }
+
+    @Override
+    public List<URI> injectURLsWithCandidates(List<String> urls) {
+        return getProvider().injectURLsWithCandidates(urls);
+    }
+
+    @Override
+    public VersionList<?> getVersionListById(String id) {
+        return getProvider().getVersionListById(id);
+    }
+
+    @Override
+    public int getConcurrency() {
+        return getProvider().getConcurrency();
+    }
+}