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// expression_tree.cpp
/**
* 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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kDefault
#include "mongo/db/matcher/expression_tree.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/bsonmisc.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/bson/bsonobjiterator.h"
#include "mongo/util/log.h"
namespace mongo {
ListOfMatchExpression::~ListOfMatchExpression() {
for ( unsigned i = 0; i < _expressions.size(); i++ )
delete _expressions[i];
_expressions.clear();
}
void ListOfMatchExpression::add( MatchExpression* e ) {
verify( e );
_expressions.push_back( e );
}
void ListOfMatchExpression::_debugList( StringBuilder& debug, int level ) const {
for ( unsigned i = 0; i < _expressions.size(); i++ )
_expressions[i]->debugString( debug, level + 1 );
}
void ListOfMatchExpression::_listToBSON(BSONArrayBuilder* out) const {
for ( unsigned i = 0; i < _expressions.size(); i++ ) {
BSONObjBuilder childBob(out->subobjStart());
_expressions[i]->toBSON(&childBob);
}
out->doneFast();
}
bool ListOfMatchExpression::equivalent( const MatchExpression* other ) const {
if ( matchType() != other->matchType() )
return false;
const ListOfMatchExpression* realOther = static_cast<const ListOfMatchExpression*>( other );
if ( _expressions.size() != realOther->_expressions.size() )
return false;
// TOOD: order doesn't matter
for ( unsigned i = 0; i < _expressions.size(); i++ )
if ( !_expressions[i]->equivalent( realOther->_expressions[i] ) )
return false;
return true;
}
// -----
bool AndMatchExpression::matches( const MatchableDocument* doc, MatchDetails* details ) const {
for ( size_t i = 0; i < numChildren(); i++ ) {
if ( !getChild(i)->matches( doc, details ) ) {
if ( details )
details->resetOutput();
return false;
}
}
return true;
}
bool AndMatchExpression::matchesSingleElement( const BSONElement& e ) const {
for ( size_t i = 0; i < numChildren(); i++ ) {
if ( !getChild(i)->matchesSingleElement( e ) ) {
return false;
}
}
return true;
}
void AndMatchExpression::debugString( StringBuilder& debug, int level ) const {
_debugAddSpace( debug, level );
debug << "$and\n";
_debugList( debug, level );
}
void AndMatchExpression::toBSON(BSONObjBuilder* out) const {
BSONArrayBuilder arrBob(out->subarrayStart("$and"));
_listToBSON(&arrBob);
}
// -----
bool OrMatchExpression::matches( const MatchableDocument* doc, MatchDetails* details ) const {
for ( size_t i = 0; i < numChildren(); i++ ) {
if ( getChild(i)->matches( doc, NULL ) ) {
return true;
}
}
return false;
}
bool OrMatchExpression::matchesSingleElement( const BSONElement& e ) const {
for ( size_t i = 0; i < numChildren(); i++ ) {
if ( getChild(i)->matchesSingleElement( e ) ) {
return true;
}
}
return false;
}
void OrMatchExpression::debugString( StringBuilder& debug, int level ) const {
_debugAddSpace( debug, level );
debug << "$or\n";
_debugList( debug, level );
}
void OrMatchExpression::toBSON(BSONObjBuilder* out) const {
BSONArrayBuilder arrBob(out->subarrayStart("$or"));
_listToBSON(&arrBob);
}
// ----
bool NorMatchExpression::matches( const MatchableDocument* doc, MatchDetails* details ) const {
for ( size_t i = 0; i < numChildren(); i++ ) {
if ( getChild(i)->matches( doc, NULL ) ) {
return false;
}
}
return true;
}
bool NorMatchExpression::matchesSingleElement( const BSONElement& e ) const {
for ( size_t i = 0; i < numChildren(); i++ ) {
if ( getChild(i)->matchesSingleElement( e ) ) {
return false;
}
}
return true;
}
void NorMatchExpression::debugString( StringBuilder& debug, int level ) const {
_debugAddSpace( debug, level );
debug << "$nor\n";
_debugList( debug, level );
}
void NorMatchExpression::toBSON(BSONObjBuilder* out) const {
BSONArrayBuilder arrBob(out->subarrayStart("$nor"));
_listToBSON(&arrBob);
}
// -------
void NotMatchExpression::debugString( StringBuilder& debug, int level ) const {
_debugAddSpace( debug, level );
debug << "$not\n";
_exp->debugString( debug, level + 1 );
}
void NotMatchExpression::toBSON(BSONObjBuilder* out) const {
BSONObjBuilder childBob(out->subobjStart("$not"));
_exp->toBSON(&childBob);
childBob.doneFast();
}
bool NotMatchExpression::equivalent( const MatchExpression* other ) const {
if ( matchType() != other->matchType() )
return false;
return _exp->equivalent( other->getChild(0) );
}
}
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