1 files changed, 73 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/patch/DiffSummaryLoader.java b/java/com/google/gerrit/server/patch/DiffSummaryLoader.java
new file mode 100644
index 0000000000..9153638199
--- /dev/null
+++ b/java/com/google/gerrit/server/patch/DiffSummaryLoader.java
@@ -0,0 +1,73 @@
+// Copyright (C) 2016 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.google.gerrit.server.patch;
+
+import com.google.gerrit.reviewdb.client.Patch;
+import com.google.gerrit.reviewdb.client.Project;
+import com.google.inject.Inject;
+import com.google.inject.assistedinject.Assisted;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Callable;
+
+public class DiffSummaryLoader implements Callable<DiffSummary> {
+  public interface Factory {
+    DiffSummaryLoader create(DiffSummaryKey key, Project.NameKey project);
+  }
+
+  private final PatchListCache patchListCache;
+  private final DiffSummaryKey key;
+  private final Project.NameKey project;
+
+  @Inject
+  DiffSummaryLoader(PatchListCache plc, @Assisted DiffSummaryKey k, @Assisted Project.NameKey p) {
+    patchListCache = plc;
+    key = k;
+    project = p;
+  }
+
+  @Override
+  public DiffSummary call() throws Exception {
+    PatchList patchList = patchListCache.get(key.toPatchListKey(), project);
+    return toDiffSummary(patchList);
+  }
+
+  private DiffSummary toDiffSummary(PatchList patchList) {
+    List<String> r = new ArrayList<>(patchList.getPatches().size());
+    for (PatchListEntry e : patchList.getPatches()) {
+      if (Patch.isMagic(e.getNewName())) {
+        continue;
+      }
+      switch (e.getChangeType()) {
+        case ADDED:
+        case MODIFIED:
+        case DELETED:
+        case COPIED:
+        case REWRITE:
+          r.add(e.getNewName());
+          break;
+
+        case RENAMED:
+          r.add(e.getOldName());
+          r.add(e.getNewName());
+          break;
+      }
+    }
+    return new DiffSummary(
+        r.stream().sorted().toArray(String[]::new),
+        patchList.getInsertions(),
+        patchList.getDeletions());
+  }
+}