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author | David Storch <david.storch@10gen.com> | 2016-07-01 15:35:39 -0400 |
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committer | David Storch <david.storch@10gen.com> | 2016-07-14 23:41:20 -0400 |
commit | 5e504b81ab84274db75f868cf1559cee015beddd (patch) | |
tree | 38ffd9247f3c95d47191065fa6e6c15a26c44289 /src/mongo/db/pipeline/value_comparator.cpp | |
parent | 751f67f4a6ff89f7b8b2475301e1976f4f583f95 (diff) | |
download | mongo-5e504b81ab84274db75f868cf1559cee015beddd.tar.gz |
SERVER-24508 DocumentComparator and ValueComparator
- Changes the Document/Value library to require comparisons
to be made in the context of a comparator object. This is
prep work for full collation support in the aggregation
system.
- Adds injectExpressionContext() to propagate the
ExpressionContext containing the comparator object to all
DocumentSource, Accumulator, and Expression instances
involved in the Pipeline.
Diffstat (limited to 'src/mongo/db/pipeline/value_comparator.cpp')
-rw-r--r-- | src/mongo/db/pipeline/value_comparator.cpp | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/mongo/db/pipeline/value_comparator.cpp b/src/mongo/db/pipeline/value_comparator.cpp new file mode 100644 index 00000000000..a20a9460b6d --- /dev/null +++ b/src/mongo/db/pipeline/value_comparator.cpp @@ -0,0 +1,57 @@ +/** + * Copyright (C) 2016 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/pipeline/value_comparator.h" + +#include "mongo/util/assert_util.h" + +namespace mongo { + +bool ValueComparator::evaluate(Value::DeferredComparison deferredComparison) const { + int cmp = Value::compare(deferredComparison.lhs, deferredComparison.rhs, _stringComparator); + switch (deferredComparison.type) { + case Value::DeferredComparison::Type::kLT: + return cmp < 0; + case Value::DeferredComparison::Type::kLTE: + return cmp <= 0; + case Value::DeferredComparison::Type::kEQ: + return cmp == 0; + case Value::DeferredComparison::Type::kGTE: + return cmp >= 0; + case Value::DeferredComparison::Type::kGT: + return cmp > 0; + case Value::DeferredComparison::Type::kNE: + return cmp != 0; + } + + MONGO_UNREACHABLE; +} + +} // namespace mongo |