From bcdcbc1edd6e245383406e9f3e44e41fd095dff6 Mon Sep 17 00:00:00 2001
From: Constantine Plotnikov <Constantine.Plotnikov@jetbrains.com>
Date: Fri, 15 May 2009 13:29:15 +0400
Subject: [PATCH] git4idea: implemented root converter for the git

---
 .../git4idea/src/git4idea/GitRootConverter.java    | 51 ++++++++++++++++++++++
 plugins/git4idea/src/git4idea/GitVcs.java          |  8 ++++
 2 files changed, 59 insertions(+)
 create mode 100644 plugins/git4idea/src/git4idea/GitRootConverter.java

diff --git a/plugins/git4idea/src/git4idea/GitRootConverter.java b/plugins/git4idea/src/git4idea/GitRootConverter.java
new file mode 100644
index 0000000000..ccb7b9db38
--- /dev/null
+++ b/plugins/git4idea/src/git4idea/GitRootConverter.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2000-2009 JetBrains s.r.o.
+ *
+ *  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 git4idea;
+
+import com.intellij.openapi.vcs.AbstractVcs;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.util.containers.HashSet;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The converter for the VCS roots
+ */
+public class GitRootConverter implements AbstractVcs.RootsConvertor {
+  /**
+   * The static instance
+   */
+  public static final GitRootConverter INSTANCE = new GitRootConverter();
+
+  /**
+   * {@inheritDoc}
+   */
+  public List<VirtualFile> convertRoots(List<VirtualFile> result) {
+    // The method relies on the fact that VFS caches metadata about files,
+    // so the query should be relatively fast and work mostly with in-memory structures.
+    ArrayList<VirtualFile> roots = new ArrayList<VirtualFile>();
+    HashSet<VirtualFile> listed = new HashSet<VirtualFile>();
+    for (VirtualFile f : result) {
+      VirtualFile r = GitUtil.gitRootOrNull(f);
+      if (r != null && listed.add(r)) {
+        roots.add(r);
+      }
+    }
+    return roots;
+  }
+}
diff --git a/plugins/git4idea/src/git4idea/GitVcs.java b/plugins/git4idea/src/git4idea/GitVcs.java
index c57372b47d..1942470475 100644
--- a/plugins/git4idea/src/git4idea/GitVcs.java
+++ b/plugins/git4idea/src/git4idea/GitVcs.java
@@ -534,4 +534,12 @@ public class GitVcs extends AbstractVcs {
     }
     return in;
   }
+
+  /**
+   * {@inheritDoc}
+   */
+  @Override
+  public RootsConvertor getCustomConvertor() {
+    return GitRootConverter.INSTANCE;
+  }
 }
\ No newline at end of file
-- 
2.11.4.GIT