SERVER-19510 Move text query parsing to TextMatchExpression::init()

- Introduces FTSQuery, which is now the base class for FTSQueryImpl.
- Introduces a derived class FTSQueryNoop (which
  TextNoOpMatchExpression now wraps).  libfts_query_noop is now linked
  into db/matcher/expressions.
- TextMatchExpression now parses the text query (which acquires a
  collection lock as part of the parsing process), and TextNode now
  stores a parsed version of the query.  The FTSQuery::parse() call in
  buildStages() is removed.

Behavior change: $text against a non-existent collection now returns
an error, instead of an empty result set.

1 files changed, 48 insertions, 0 deletions

diff --git a/src/mongo/db/fts/fts_query_noop.cpp b/src/mongo/db/fts/fts_query_noop.cpp
new file mode 100644
index 00000000000..d6da988a3e0
--- /dev/null
+++ b/src/mongo/db/fts/fts_query_noop.cpp
@@ -0,0 +1,48 @@
+/**
+ *    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.
+ */
+
+#include "mongo/platform/basic.h"
+
+#include "mongo/db/fts/fts_query_noop.h"
+
+#include "mongo/stdx/memory.h"
+
+namespace mongo {
+namespace fts {
+
+std::unique_ptr<FTSQuery> FTSQueryNoop::clone() const {
+    auto clonedQuery = stdx::make_unique<FTSQueryNoop>();
+    clonedQuery->setQuery(getQuery());
+    clonedQuery->setLanguage(getLanguage());
+    clonedQuery->setCaseSensitive(getCaseSensitive());
+    clonedQuery->setDiacriticSensitive(getDiacriticSensitive());
+    return std::move(clonedQuery);
+}
+
+}  // namespace fts
+}  // namespace mongo