1 files changed, 43 insertions, 0 deletions
diff --git a/container-search/src/main/java/com/yahoo/search/grouping/request/DivFunction.java b/container-search/src/main/java/com/yahoo/search/grouping/request/DivFunction.java
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+++ b/container-search/src/main/java/com/yahoo/search/grouping/request/DivFunction.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.List;
+
+/**
+ * This class represents a div-function in a {@link GroupingExpression}. It evaluates to a number that equals the result
+ * of dividing the results of all arguments in the order they were given to the constructor (divide first argument by
+ * second, result by third, ...).
+ *
+ * @author <a href="mailto:simon@yahoo-inc.com">Simon Thoresen</a>
+ */
+public class DivFunction extends FunctionNode {
+
+    /**
+     * Constructs a new instance of this class.
+     *
+     * @param arg1 The first compulsory argument, must evaluate to a number.
+     * @param arg2 The second compulsory argument, must evaluate to a number.
+     * @param argN The optional arguments, must evaluate to a number.
+     */
+    public DivFunction(GroupingExpression arg1, GroupingExpression arg2, GroupingExpression... argN) {
+        this(asList(arg1, arg2, argN));
+    }
+
+    private DivFunction(List<GroupingExpression> args) {
+        super("div", args);
+    }
+
+    /**
+     * Constructs a new instance of this class from a list of arguments.
+     *
+     * @param args The arguments to pass to the constructor.
+     * @return The created instance.
+     * @throws IllegalArgumentException Thrown if the number of arguments is less than 2.
+     */
+    public static DivFunction newInstance(List<GroupingExpression> args) {
+        if (args.size() < 2) {
+            throw new IllegalArgumentException("Expected 2 or more arguments, got " + args.size() + ".");
+        }
+        return new DivFunction(args);
+    }
+}