Make *Info classes in GetServerInfo movable to extension package

When we implement an API for the /config REST endpoints we need to
move the *Info classes that describe the JSON result into the
extension package. This is only possible when they do not depend on
Gerrit implementation classes. This is why their initialization
shouldn't be done in the constructors, but in the code that creates
the *Info instances.

Change-Id: Ia57f6e1a872d028efc2dfc6cce88f5b6aa9ffcbe
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

gerrit-server/src/main/java/com/google/gerrit/server/config/GetServerInfo.java

@@ -78,11 +78,11 @@ public class GetServerInfo implements RestReadView<ConfigResource> {
   @Override
   public ServerInfo apply(ConfigResource rsrc) throws MalformedURLException {
     ServerInfo info = new ServerInfo();
-    info.auth = new AuthInfo(authConfig, realm);
+    info.auth = getAuthInfo(authConfig, realm);
     info.change = getChangeInfo(config);
     info.contactStore = getContactStoreInfo();
     info.download =
-        new DownloadInfo(downloadSchemes, downloadCommands, archiveFormats);
+        getDownloadInfo(downloadSchemes, downloadCommands, archiveFormats);
     info.gerrit = getGerritInfo(config, allProjectsName, allUsersName);
     info.gitWeb = getGitWebInfo(gitWebConfig);
     info.suggest = getSuggestInfo(config);
@@ -90,6 +90,45 @@ public class GetServerInfo implements RestReadView<ConfigResource> {
     return info;
   }
 
+  private AuthInfo getAuthInfo(AuthConfig cfg, Realm realm) {
+    AuthInfo info = new AuthInfo();
+    info.authType = cfg.getAuthType();
+    info.useContributorAgreements = toBoolean(cfg.isUseContributorAgreements());
+    info.editableAccountFields = new ArrayList<>(realm.getEditableFields());
+    info.switchAccountUrl = cfg.getSwitchAccountUrl();
+
+    switch (info.authType) {
+      case LDAP:
+      case LDAP_BIND:
+        info.registerUrl = cfg.getRegisterUrl();
+        info.registerText = cfg.getRegisterText();
+        info.editFullNameUrl = cfg.getEditFullNameUrl();
+        info.isGitBasicAuth = toBoolean(cfg.isGitBasicAuth());
+        break;
+
+      case CUSTOM_EXTENSION:
+        info.registerUrl = cfg.getRegisterUrl();
+        info.registerText = cfg.getRegisterText();
+        info.editFullNameUrl = cfg.getEditFullNameUrl();
+        info.httpPasswordUrl = cfg.getHttpPasswordUrl();
+        break;
+
+      case HTTP:
+      case HTTP_LDAP:
+        info.loginUrl = cfg.getLoginUrl();
+        info.loginText = cfg.getLoginText();
+        break;
+
+      case CLIENT_SSL_CERT_LDAP:
+      case DEVELOPMENT_BECOME_ANY_ACCOUNT:
+      case OAUTH:
+      case OPENID:
+      case OPENID_SSO:
+        break;
+    }
+    return info;
+  }
+
   private ChangeConfigInfo getChangeInfo(Config cfg) {
     ChangeConfigInfo info = new ChangeConfigInfo();
     info.allowDrafts = toBoolean(cfg.getBoolean("change", "allowDrafts", true));
@@ -116,6 +155,49 @@ public class GetServerInfo implements RestReadView<ConfigResource> {
     return contactStore;
   }
 
+  private DownloadInfo getDownloadInfo(DynamicMap<DownloadScheme> downloadSchemes,
+      DynamicMap<DownloadCommand> downloadCommands,
+      GetArchive.AllowedFormats archiveFormats) {
+    DownloadInfo info = new DownloadInfo();
+    info.schemes = new HashMap<>();
+    for (DynamicMap.Entry<DownloadScheme> e : downloadSchemes) {
+      DownloadScheme scheme = e.getProvider().get();
+      if (scheme.isEnabled() && scheme.getUrl("${project}") != null) {
+        info.schemes.put(e.getExportName(),
+            getDownloadSchemeInfo(scheme, downloadCommands));
+      }
+    }
+    info.archives = Lists.newArrayList(Iterables.transform(
+        archiveFormats.getAllowed(),
+        new Function<ArchiveFormat, String>() {
+          @Override
+          public String apply(ArchiveFormat in) {
+            return in.getShortName();
+          }
+        }));
+    return info;
+  }
+
+  private DownloadSchemeInfo getDownloadSchemeInfo(DownloadScheme scheme,
+      DynamicMap<DownloadCommand> downloadCommands) {
+    DownloadSchemeInfo info = new DownloadSchemeInfo();
+    info.url = scheme.getUrl("${project}");
+    info.isAuthRequired = toBoolean(scheme.isAuthRequired());
+    info.isAuthSupported = toBoolean(scheme.isAuthSupported());
+
+    info.commands = new HashMap<>();
+    for (DynamicMap.Entry<DownloadCommand> e : downloadCommands) {
+      String commandName = e.getExportName();
+      DownloadCommand command = e.getProvider().get();
+      String c = command.getCommand(scheme, "${project}", "${ref}");
+      if (c != null) {
+        info.commands.put(commandName, c);
+      }
+    }
+
+    return info;
+  }
+
   private GerritInfo getGerritInfo(Config cfg, AllProjectsName allProjectsName,
       AllUsersName allUsersName) {
     GerritInfo info = new GerritInfo();
@@ -176,43 +258,6 @@ public class GetServerInfo implements RestReadView<ConfigResource> {
     public String editFullNameUrl;
     public String httpPasswordUrl;
     public Boolean isGitBasicAuth;
-
-    public AuthInfo(AuthConfig cfg, Realm realm) {
-      authType = cfg.getAuthType();
-      useContributorAgreements = toBoolean(cfg.isUseContributorAgreements());
-      editableAccountFields = new ArrayList<>(realm.getEditableFields());
-      switchAccountUrl = cfg.getSwitchAccountUrl();
-
-      switch (authType) {
-        case LDAP:
-        case LDAP_BIND:
-          registerUrl = cfg.getRegisterUrl();
-          registerText = cfg.getRegisterText();
-          editFullNameUrl = cfg.getEditFullNameUrl();
-          isGitBasicAuth = toBoolean(cfg.isGitBasicAuth());
-          break;
-
-        case CUSTOM_EXTENSION:
-          registerUrl = cfg.getRegisterUrl();
-          registerText = cfg.getRegisterText();
-          editFullNameUrl = cfg.getEditFullNameUrl();
-          httpPasswordUrl = cfg.getHttpPasswordUrl();
-          break;
-
-        case HTTP:
-        case HTTP_LDAP:
-          loginUrl = cfg.getLoginUrl();
-          loginText = cfg.getLoginText();
-          break;
-
-        case CLIENT_SSL_CERT_LDAP:
-        case DEVELOPMENT_BECOME_ANY_ACCOUNT:
-        case OAUTH:
-        case OPENID:
-        case OPENID_SSO:
-          break;
-      }
-    }
   }
 
   public static class ChangeConfigInfo {
@@ -230,27 +275,6 @@ public class GetServerInfo implements RestReadView<ConfigResource> {
   public static class DownloadInfo {
     public Map<String, DownloadSchemeInfo> schemes;
     public List<String> archives;
-
-    public DownloadInfo(DynamicMap<DownloadScheme> downloadSchemes,
-        DynamicMap<DownloadCommand> downloadCommands,
-        GetArchive.AllowedFormats archiveFormats) {
-      schemes = new HashMap<>();
-      for (DynamicMap.Entry<DownloadScheme> e : downloadSchemes) {
-        DownloadScheme scheme = e.getProvider().get();
-        if (scheme.isEnabled() && scheme.getUrl("${project}") != null) {
-          schemes.put(e.getExportName(),
-              new DownloadSchemeInfo(scheme, downloadCommands));
-        }
-      }
-      archives = Lists.newArrayList(Iterables.transform(
-          archiveFormats.getAllowed(),
-          new Function<ArchiveFormat, String>() {
-            @Override
-            public String apply(ArchiveFormat in) {
-              return in.getShortName();
-            }
-          }));
-    }
   }
 
   public static class DownloadSchemeInfo {
@@ -258,23 +282,6 @@ public class GetServerInfo implements RestReadView<ConfigResource> {
     public Boolean isAuthRequired;
     public Boolean isAuthSupported;
     public Map<String, String> commands;
-
-    public DownloadSchemeInfo(DownloadScheme scheme,
-        DynamicMap<DownloadCommand> downloadCommands) {
-      url = scheme.getUrl("${project}");
-      isAuthRequired = toBoolean(scheme.isAuthRequired());
-      isAuthSupported = toBoolean(scheme.isAuthSupported());
-
-      commands = new HashMap<>();
-      for (DynamicMap.Entry<DownloadCommand> e : downloadCommands) {
-        String commandName = e.getExportName();
-        DownloadCommand command = e.getProvider().get();
-        String c = command.getCommand(scheme, "${project}", "${ref}");
-        if (c != null) {
-          commands.put(commandName, c);
-        }
-      }
-    }
   }
 
   public static class GerritInfo {