1 files changed, 67 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/query/change/AndChangeSource.java b/java/com/google/gerrit/server/query/change/AndChangeSource.java
new file mode 100644
index 0000000000..ff1ab23c89
--- /dev/null
+++ b/java/com/google/gerrit/server/query/change/AndChangeSource.java
@@ -0,0 +1,67 @@
+// Copyright (C) 2010 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.query.change;
+
+import com.google.gerrit.index.query.AndSource;
+import com.google.gerrit.index.query.IsVisibleToPredicate;
+import com.google.gerrit.index.query.Predicate;
+import com.google.gwtorm.server.OrmException;
+import com.google.gwtorm.server.OrmRuntimeException;
+import java.util.Collection;
+import java.util.List;
+
+public class AndChangeSource extends AndSource<ChangeData> implements ChangeDataSource {
+
+  public AndChangeSource(Collection<Predicate<ChangeData>> that) {
+    super(that);
+  }
+
+  public AndChangeSource(
+      Predicate<ChangeData> that,
+      IsVisibleToPredicate<ChangeData> isVisibleToPredicate,
+      int start) {
+    super(that, isVisibleToPredicate, start);
+  }
+
+  @Override
+  public boolean hasChange() {
+    return source != null
+        && source instanceof ChangeDataSource
+        && ((ChangeDataSource) source).hasChange();
+  }
+
+  @Override
+  protected List<ChangeData> transformBuffer(List<ChangeData> buffer) throws OrmRuntimeException {
+    if (!hasChange()) {
+      try {
+        ChangeData.ensureChangeLoaded(buffer);
+      } catch (OrmException e) {
+        throw new OrmRuntimeException(e);
+      }
+    }
+    return super.transformBuffer(buffer);
+  }
+
+  @Override
+  public int compare(Predicate<ChangeData> a, Predicate<ChangeData> b) {
+    int cmp = super.compare(a, b);
+    if (cmp == 0 && a instanceof ChangeDataSource && b instanceof ChangeDataSource) {
+      ChangeDataSource as = (ChangeDataSource) a;
+      ChangeDataSource bs = (ChangeDataSource) b;
+      cmp = (as.hasChange() ? 0 : 1) - (bs.hasChange() ? 0 : 1);
+    }
+    return cmp;
+  }
+}