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1 files changed, 33 insertions, 0 deletions

diff --git a/container-search/src/main/java/com/yahoo/search/grouping/request/XorBitFunction.java b/container-search/src/main/java/com/yahoo/search/grouping/request/XorBitFunction.java
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+++ b/container-search/src/main/java/com/yahoo/search/grouping/request/XorBitFunction.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 an xor-function in a {@link GroupingExpression}. It evaluates to a long that equals the xor of
+ * 'width' bits over the binary representation of the result of the argument.
+ *
+ * @author <a href="mailto:simon@yahoo-inc.com">Simon Thoresen</a>
+ */
+public class XorBitFunction extends FunctionNode {
+
+    /**
+     * Constructs a new instance of this class.
+     *
+     * @param exp     The expression to evaluate.
+     * @param numBits The number of bits of the expression value to xor.
+     */
+    public XorBitFunction(GroupingExpression exp, int numBits) {
+        super("xorbit", Arrays.asList(exp, new LongValue(numBits)));
+    }
+
+    /**
+     * Returns the number of bits of the expression value to xor.
+     *
+     * @return The bit count.
+     */
+    public int getNumBits() {
+        return ((LongValue)getArg(1)).getValue().intValue();
+    }
+}
+