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// matcher.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/>.
*/
#pragma once
#include <boost/scoped_ptr.hpp>
#include "mongo/base/disallow_copying.h"
#include "mongo/base/status.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/db/matcher/expression.h"
#include "mongo/db/matcher/match_details.h"
namespace mongo {
class Matcher2 {
MONGO_DISALLOW_COPYING( Matcher2 );
struct IndexSpliceInfo {
IndexSpliceInfo() {
hasNullEquality = false;
}
bool hasNullEquality;
};
public:
explicit Matcher2( const BSONObj& pattern, bool nested=false /* do not use */ );
/**
* Generate a matcher for the provided index key format using the
* provided full doc matcher.
* THIS API WILL GO AWAY EVENTUALLY
*/
explicit Matcher2( const Matcher2 &docMatcher, const BSONObj &constrainIndexKey );
bool matches(const BSONObj& doc, MatchDetails* details = NULL ) const;
bool atomic() const;
bool hasExistsFalse() const;
/*
* this is from old mature
* criteria is 1 equality expression, nothing else
*/
bool singleSimpleCriterion() const;
const BSONObj* getQuery() const { return &_pattern; };
std::string toString() const { return _pattern.toString(); }
/**
* @return true if this key matcher will return the same true/false
* value as the provided doc matcher.
*/
bool keyMatch( const Matcher2 &docMatcher ) const;
static MatchExpression* spliceForIndex( const BSONObj& key,
const MatchExpression* full,
IndexSpliceInfo* spliceInfo );
private:
BSONObj _pattern;
BSONObj _indexKey;
boost::scoped_ptr<MatchExpression> _expression;
IndexSpliceInfo _spliceInfo;
static MatchExpression* _spliceForIndex( const set<std::string>& keys,
const MatchExpression* full,
IndexSpliceInfo* spliceInfo );
};
}
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