1 files changed, 22 insertions, 0 deletions
diff --git a/container-search/src/main/java/com/yahoo/search/grouping/request/ReverseFunction.java b/container-search/src/main/java/com/yahoo/search/grouping/request/ReverseFunction.java
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index 00000000000..274bb20c9f7
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+++ b/container-search/src/main/java/com/yahoo/search/grouping/request/ReverseFunction.java
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+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.search.grouping.request;
+
+import java.util.Arrays;
+
+/**
+ * This class represents a reverse-function in a {@link GroupingExpression}. It evaluates to a list that equals the list
+ * result of the argument, sorted in descending order.
+ *
+ * @author <a href="mailto:balder@yahoo-inc.com">Henning Baldersheim</a>
+ */
+public class ReverseFunction extends FunctionNode {
+
+    /**
+     * Constructs a new instance of this class.
+     *
+     * @param exp The expression to evaluate, must evaluate to a list.
+     */
+    public ReverseFunction(GroupingExpression exp) {
+        super("reverse", Arrays.asList(exp));
+    }
+}