Remove SecureCredentialsProvider, use JGit's UsernamePasswordCredentialsProvider

The SecureCredentialsProvider class actually had nothing to do with the
user/pass from the secure.config as its name suggests. It was just
another implementation of a user/pass credentials provider. Since JGit
already provides a standard implementation,
UsernamePasswordCredentialsProvider, prefer to use that one.

Change-Id: Iedd196f8bcec15328b4b0c15afe399e3e19bfa70
diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/SecureCredentialsFactory.java b/src/main/java/com/googlesource/gerrit/plugins/replication/SecureCredentialsFactory.java
index 2b0c16b..e511b92 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/SecureCredentialsFactory.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/SecureCredentialsFactory.java
@@ -20,6 +20,8 @@
 import org.eclipse.jgit.errors.ConfigInvalidException;
 import org.eclipse.jgit.lib.Config;
 import org.eclipse.jgit.storage.file.FileBasedConfig;
+import org.eclipse.jgit.transport.CredentialsProvider;
+import org.eclipse.jgit.transport.UsernamePasswordCredentialsProvider;
 import org.eclipse.jgit.util.FS;
 
 /** Looks up a remote's password in secure.config. */
@@ -48,9 +50,9 @@
   }
 
   @Override
-  public SecureCredentialsProvider create(String remoteName) {
+  public CredentialsProvider create(String remoteName) {
     String user = config.getString("remote", remoteName, "username");
     String pass = config.getString("remote", remoteName, "password");
-    return new SecureCredentialsProvider(user, pass);
+    return new UsernamePasswordCredentialsProvider(user, pass);
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/SecureCredentialsProvider.java b/src/main/java/com/googlesource/gerrit/plugins/replication/SecureCredentialsProvider.java
deleted file mode 100644
index c4294a9..0000000
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/SecureCredentialsProvider.java
+++ /dev/null
@@ -1,80 +0,0 @@
-// Copyright (C) 2011 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package com.googlesource.gerrit.plugins.replication;
-
-import org.eclipse.jgit.errors.UnsupportedCredentialItem;
-import org.eclipse.jgit.transport.CredentialItem;
-import org.eclipse.jgit.transport.CredentialsProvider;
-import org.eclipse.jgit.transport.URIish;
-
-/** Looks up a remote's password in secure.config. */
-class SecureCredentialsProvider extends CredentialsProvider {
-  private final String cfgUser;
-  private final String cfgPass;
-
-  SecureCredentialsProvider(String user, String pass) {
-    cfgUser = user;
-    cfgPass = pass;
-  }
-
-  @Override
-  public boolean isInteractive() {
-    return false;
-  }
-
-  @Override
-  public boolean supports(CredentialItem... items) {
-    for (CredentialItem i : items) {
-      if (i instanceof CredentialItem.Username) {
-        continue;
-      } else if (i instanceof CredentialItem.Password) {
-        continue;
-      } else {
-        return false;
-      }
-    }
-    return true;
-  }
-
-  @Override
-  public boolean get(URIish uri, CredentialItem... items) throws UnsupportedCredentialItem {
-    String username = uri.getUser();
-    if (username == null) {
-      username = cfgUser;
-    }
-    if (username == null) {
-      return false;
-    }
-
-    String password = uri.getPass();
-    if (password == null) {
-      password = cfgPass;
-    }
-    if (password == null) {
-      return false;
-    }
-
-    for (CredentialItem i : items) {
-      if (i instanceof CredentialItem.Username) {
-        ((CredentialItem.Username) i).setValue(username);
-      } else if (i instanceof CredentialItem.Password) {
-        ((CredentialItem.Password) i).setValue(password.toCharArray());
-      } else {
-        throw new UnsupportedCredentialItem(uri, i.getPromptText());
-      }
-    }
-    return true;
-  }
-}