1 files changed, 23 insertions, 0 deletions
diff --git a/nouveau/src/main/java/org/apache/couchdb/nouveau/core/IndexFunction.java b/nouveau/src/main/java/org/apache/couchdb/nouveau/core/IndexFunction.java
new file mode 100644
index 000000000..987c9303b
--- /dev/null
+++ b/nouveau/src/main/java/org/apache/couchdb/nouveau/core/IndexFunction.java
@@ -0,0 +1,23 @@
+//
+// 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 org.apache.couchdb.nouveau.core;
+
+import java.io.IOException;
+
+@FunctionalInterface
+public interface IndexFunction {
+
+    <T> T with(final Index index) throws IOException;
+
+}