diff options
author | Katherine Wu <katherine.wu@mongodb.com> | 2020-02-07 15:07:48 +0000 |
---|---|---|
committer | evergreen <evergreen@mongodb.com> | 2020-02-07 15:07:48 +0000 |
commit | 656313f6c949a5c49c42d080548067d5a8c37047 (patch) | |
tree | 771207f0e143f3243a59d332de6d0af76f1c5964 /src/mongo/db/pipeline/expression_function.h | |
parent | b52d0d06a080ac7b2879ebb7da4a551f5aa36610 (diff) | |
download | mongo-656313f6c949a5c49c42d080548067d5a8c37047.tar.gz |
SERVER-45453 Change name and usage of '$_internalJs' to '$function'
Diffstat (limited to 'src/mongo/db/pipeline/expression_function.h')
-rw-r--r-- | src/mongo/db/pipeline/expression_function.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/src/mongo/db/pipeline/expression_function.h b/src/mongo/db/pipeline/expression_function.h new file mode 100644 index 00000000000..3d8d5e2df7b --- /dev/null +++ b/src/mongo/db/pipeline/expression_function.h @@ -0,0 +1,79 @@ +/** + * Copyright (C) 2019-present MongoDB, Inc. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the Server Side Public License, version 1, + * as published by MongoDB, Inc. + * + * 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 + * Server Side Public License for more details. + * + * You should have received a copy of the Server Side Public License + * along with this program. If not, see + * <http://www.mongodb.com/licensing/server-side-public-license>. + * + * 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 Server Side 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 "mongo/db/pipeline/expression.h" +#include "mongo/db/pipeline/javascript_execution.h" + +namespace mongo { +/** + * This expression takes a function, an array of arguments to pass to it, and the language + * specifier (currently limited to JavaScript). It returns the return value of the function with + * the given arguments. + */ +class ExpressionFunction final : public Expression { +public: + static boost::intrusive_ptr<Expression> parse( + const boost::intrusive_ptr<ExpressionContext>& expCtx, + BSONElement expr, + const VariablesParseState& vps); + + static boost::intrusive_ptr<ExpressionFunction> create( + const boost::intrusive_ptr<ExpressionContext>& expCtx, + boost::intrusive_ptr<Expression> passedArgs, + std::string funcSourceString, + std::string lang) { + return new ExpressionFunction{ + expCtx, passedArgs, std::move(funcSourceString), std::move(lang)}; + } + + Value evaluate(const Document& root, Variables* variables) const final; + + Value serialize(bool explain) const final; + + void acceptVisitor(ExpressionVisitor* visitor) final { + return visitor->visit(this); + } + + static constexpr auto kExpressionName = "$function"_sd; + static constexpr auto kJavaScript = "js"; + +private: + ExpressionFunction(const boost::intrusive_ptr<ExpressionContext>& expCtx, + boost::intrusive_ptr<Expression> passedArgs, + std::string funcSourceString, + std::string lang); + void _doAddDependencies(DepsTracker* deps) const final override; + + const boost::intrusive_ptr<Expression>& _passedArgs; + std::string _funcSource; + std::string _lang; +}; +} // namespace mongo
\ No newline at end of file |