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// expression_parser.h
/**
* Copyright (C) 2013 10gen 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 "mongo/base/status.h"
#include "mongo/base/status_with.h"
#include "mongo/db/matcher/expression.h"
#include "mongo/db/matcher/expression_leaf.h"
#include "mongo/db/matcher/expression_tree.h"
#include "mongo/db/matcher/expression_type.h"
#include "mongo/db/matcher/expression_with_placeholder.h"
#include "mongo/db/matcher/extensions_callback.h"
#include "mongo/db/matcher/extensions_callback_noop.h"
#include "mongo/db/matcher/schema/expression_internal_schema_allowed_properties.h"
#include "mongo/db/pipeline/expression.h"
#include "mongo/db/pipeline/expression_context.h"
#include "mongo/stdx/functional.h"
namespace mongo {
class OperationContext;
enum class PathAcceptingKeyword {
ALL,
BITS_ALL_CLEAR,
BITS_ALL_SET,
BITS_ANY_CLEAR,
BITS_ANY_SET,
ELEM_MATCH,
EQUALITY,
EXISTS,
GEO_INTERSECTS,
GEO_NEAR,
GREATER_THAN,
GREATER_THAN_OR_EQUAL,
INTERNAL_EXPR_EQ,
INTERNAL_SCHEMA_ALL_ELEM_MATCH_FROM_INDEX,
INTERNAL_SCHEMA_EQ,
INTERNAL_SCHEMA_FMOD,
INTERNAL_SCHEMA_MATCH_ARRAY_INDEX,
INTERNAL_SCHEMA_MAX_ITEMS,
INTERNAL_SCHEMA_MAX_LENGTH,
INTERNAL_SCHEMA_MIN_ITEMS,
INTERNAL_SCHEMA_MIN_LENGTH,
INTERNAL_SCHEMA_OBJECT_MATCH,
INTERNAL_SCHEMA_TYPE,
INTERNAL_SCHEMA_UNIQUE_ITEMS,
IN_EXPR,
LESS_THAN,
LESS_THAN_OR_EQUAL,
MOD,
NOT_EQUAL,
NOT_IN,
OPTIONS,
REGEX,
SIZE,
TYPE,
WITHIN,
};
class MatchExpressionParser {
public:
/**
* Features allowed in match expression parsing.
*/
enum AllowedFeatures {
kText = 1,
kGeoNear = 1 << 1,
kJavascript = 1 << 2,
kExpr = 1 << 3,
kJSONSchema = 1 << 4,
};
using AllowedFeatureSet = unsigned long long;
static constexpr AllowedFeatureSet kBanAllSpecialFeatures = 0;
static constexpr AllowedFeatureSet kAllowAllSpecialFeatures =
std::numeric_limits<unsigned long long>::max();
static constexpr AllowedFeatureSet kDefaultSpecialFeatures =
AllowedFeatures::kExpr | AllowedFeatures::kJSONSchema;
/**
* Constant double representation of 2^63.
*/
static const double kLongLongMaxPlusOneAsDouble;
/**
* Parses PathAcceptingKeyword from 'typeElem'. Returns 'defaultKeyword' if 'typeElem'
* doesn't represent a known type, or represents PathAcceptingKeyword::EQUALITY which is not
* handled by this parser (see SERVER-19565).
*/
static boost::optional<PathAcceptingKeyword> parsePathAcceptingKeyword(
BSONElement typeElem, boost::optional<PathAcceptingKeyword> defaultKeyword = boost::none);
/**
* Caller has to maintain ownership of 'obj'.
* The tree has views (BSONElement) into 'obj'.
*/
static StatusWithMatchExpression parse(
const BSONObj& obj,
const boost::intrusive_ptr<ExpressionContext>& expCtx,
const ExtensionsCallback& extensionsCallback = ExtensionsCallbackNoop(),
AllowedFeatureSet allowedFeatures = kDefaultSpecialFeatures);
/**
* Parses a BSONElement of any numeric type into a positive long long, failing if the value
* is any of the following:
*
* - NaN.
* - Negative.
* - A floating point number which is not integral.
* - Too large to fit within a 64-bit signed integer.
*/
static StatusWith<long long> parseIntegerElementToNonNegativeLong(BSONElement elem);
/**
* Parses a BSONElement of any numeric type into a long long, failing if the value
* is any of the following:
*
* - NaN.
* - A floating point number which is not integral.
* - Too large in the positive or negative direction to fit within a 64-bit signed integer.
*/
static StatusWith<long long> parseIntegerElementToLong(BSONElement elem);
/**
* Parses a BSONElement of any numeric type into an integer, failing if the value is:
*
* - NaN
* - a non-integral number
* - too large in the positive or negative direction to fit in an int
*/
static StatusWith<int> parseIntegerElementToInt(BSONElement elem);
};
} // namespace mongo