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diff --git a/src/mongo/db/fts/fts_query.h b/src/mongo/db/fts/fts_query.h
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+/**
+ *    Copyright (C) 2015 MongoDB Inc.
+ *
+ *    This program is free software: you can redistribute it and/or  modify
+ *    it under the terms of the GNU Affero General Public License, version 3,
+ *    as published by the Free Software Foundation.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Affero General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Affero General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the GNU Affero General Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#pragma once
+
+#include <string>
+
+#include "mongo/db/fts/fts_util.h"
+
+namespace mongo {
+namespace fts {
+
+/**
+ * An FTSQuery represents a parsed text search query.
+ */
+class FTSQuery {
+public:
+    virtual ~FTSQuery() {}
+
+    void setQuery(std::string query) {
+        _query = std::move(query);
+    }
+
+    void setLanguage(std::string language) {
+        _language = std::move(language);
+    }
+
+    void setCaseSensitive(bool caseSensitive) {
+        _caseSensitive = caseSensitive;
+    }
+
+    void setDiacriticSensitive(bool diacriticSensitive) {
+        _diacriticSensitive = diacriticSensitive;
+    }
+
+    const std::string& getQuery() const {
+        return _query;
+    }
+
+    const std::string& getLanguage() const {
+        return _language;
+    }
+
+    bool getCaseSensitive() const {
+        return _caseSensitive;
+    }
+
+    bool getDiacriticSensitive() const {
+        return _diacriticSensitive;
+    }
+
+    /**
+     * Returns true iff '*this' and 'other' have the same unparsed form.
+     */
+    bool equivalent(const FTSQuery& other) const {
+        return _query == other._query && _language == other._language &&
+            _caseSensitive == other._caseSensitive &&
+            _diacriticSensitive == other._diacriticSensitive;
+    }
+
+    /**
+     * Parses the text search query. Before parsing, the FTSQuery needs to be initialized with
+     * the set*() methods above.
+     *
+     * Returns Status::OK() if parsing was successful; returns an error Status otherwise.
+     */
+    virtual Status parse(TextIndexVersion textIndexVersion) = 0;
+
+    /**
+     * Returns a copy of this FTSQuery.
+     */
+    virtual std::unique_ptr<FTSQuery> clone() const = 0;
+
+private:
+    std::string _query;
+    std::string _language;
+    bool _caseSensitive = false;
+    bool _diacriticSensitive = false;
+};
+
+}  // namespace fts
+}  // namespace mongo