Status MatchExpressionParser::_parseSub( const char* name,
const BSONObj& sub,
AndMatchExpression* root ) {
// The one exception to {field : {fully contained argument} } is, of course, geo. Example:
// sub == { field : {$near[Sphere]: [0,0], $maxDistance: 1000, $minDistance: 10 } }
// We peek inside of 'sub' to see if it's possibly a $near. If so, we can't iterate over
// its subfields and parse them one at a time (there is no $maxDistance without $near), so
// we hand the entire object over to the geo parsing routines.
BSONObjIterator geoIt(sub);
if (geoIt.more()) {
BSONElement firstElt = geoIt.next();
if (firstElt.isABSONObj()) {
const char* fieldName = firstElt.fieldName();
// TODO: Having these $fields here isn't ideal but we don't want to pull in anything
// from db/geo at this point, since it may not actually be linked in...
if (mongoutils::str::equals(fieldName, "$near")
|| mongoutils::str::equals(fieldName, "$nearSphere")
|| mongoutils::str::equals(fieldName, "$geoNear")
|| mongoutils::str::equals(fieldName, "$maxDistance")
|| mongoutils::str::equals(fieldName, "$minDistance")) {
StatusWithMatchExpression s = expressionParserGeoCallback(name,
firstElt.getGtLtOp(),
sub);
if (s.isOK()) {
root->add(s.getValue());
return Status::OK();
}
}
}
}
BSONObjIterator j( sub );
while ( j.more() ) {
BSONElement deep = j.next();
StatusWithMatchExpression s = _parseSubField( sub, root, name, deep );
if ( !s.isOK() )
return s.getStatus();
if ( s.getValue() )
root->add( s.getValue() );
}
return Status::OK();
}
StatusWithMatchExpression MatchExpressionParser::_parseSubField( const BSONObj& context,
const AndMatchExpression* andSoFar,
const char* name,
const BSONElement& e ) {
// TODO: these should move to getGtLtOp, or its replacement
if ( mongoutils::str::equals( "$eq", e.fieldName() ) )
return _parseComparison( name, new EqualityMatchExpression(), e );
if ( mongoutils::str::equals( "$not", e.fieldName() ) ) {
return _parseNot( name, e );
}
int x = e.getGtLtOp(-1);
switch ( x ) {
case -1:
return StatusWithMatchExpression( ErrorCodes::BadValue,
mongoutils::str::stream() << "unknown operator: "
<< e.fieldName() );
case BSONObj::LT:
return _parseComparison( name, new LTMatchExpression(), e );
case BSONObj::LTE:
return _parseComparison( name, new LTEMatchExpression(), e );
case BSONObj::GT:
return _parseComparison( name, new GTMatchExpression(), e );
case BSONObj::GTE:
return _parseComparison( name, new GTEMatchExpression(), e );
case BSONObj::NE: {
StatusWithMatchExpression s = _parseComparison( name, new EqualityMatchExpression(), e );
if ( !s.isOK() )
return s;
std::auto_ptr<NotMatchExpression> n( new NotMatchExpression() );
Status s2 = n->init( s.getValue() );
if ( !s2.isOK() )
return StatusWithMatchExpression( s2 );
return StatusWithMatchExpression( n.release() );
}
case BSONObj::Equality:
return _parseComparison( name, new EqualityMatchExpression(), e );
case BSONObj::opIN: {
if ( e.type() != Array )
return StatusWithMatchExpression( ErrorCodes::BadValue, "$in needs an array" );
std::auto_ptr<InMatchExpression> temp( new InMatchExpression() );
Status s = temp->init( name );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
s = _parseArrayFilterEntries( temp->getArrayFilterEntries(), e.Obj() );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
return StatusWithMatchExpression( temp.release() );
}
case BSONObj::NIN: {
if ( e.type() != Array )
return StatusWithMatchExpression( ErrorCodes::BadValue, "$nin needs an array" );
std::auto_ptr<InMatchExpression> temp( new InMatchExpression() );
Status s = temp->init( name );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
s = _parseArrayFilterEntries( temp->getArrayFilterEntries(), e.Obj() );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
std::auto_ptr<NotMatchExpression> temp2( new NotMatchExpression() );
s = temp2->init( temp.release() );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
return StatusWithMatchExpression( temp2.release() );
}
case BSONObj::opSIZE: {
int size = 0;
if ( e.type() == String ) {
// matching old odd semantics
size = 0;
}
else if ( e.type() == NumberInt || e.type() == NumberLong ) {
if (e.numberLong() < 0) {
// SERVER-11952. Setting 'size' to -1 means that no documents
// should match this $size expression.
size = -1;
}
else {
size = e.numberInt();
}
}
else if ( e.type() == NumberDouble ) {
if ( e.numberInt() == e.numberDouble() ) {
size = e.numberInt();
}
else {
// old semantcs require exact numeric match
// so [1,2] != 1 or 2
size = -1;
}
}
else {
return StatusWithMatchExpression( ErrorCodes::BadValue, "$size needs a number" );
}
std::auto_ptr<SizeMatchExpression> temp( new SizeMatchExpression() );
Status s = temp->init( name, size );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
return StatusWithMatchExpression( temp.release() );
}
case BSONObj::opEXISTS: {
if ( e.eoo() )
return StatusWithMatchExpression( ErrorCodes::BadValue, "$exists can't be eoo" );
std::auto_ptr<ExistsMatchExpression> temp( new ExistsMatchExpression() );
Status s = temp->init( name );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
if ( e.trueValue() )
return StatusWithMatchExpression( temp.release() );
std::auto_ptr<NotMatchExpression> temp2( new NotMatchExpression() );
s = temp2->init( temp.release() );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
return StatusWithMatchExpression( temp2.release() );
}
case BSONObj::opTYPE: {
if ( !e.isNumber() )
return StatusWithMatchExpression( ErrorCodes::BadValue, "$type has to be a number" );
int type = e.numberInt();
if ( e.type() != NumberInt && type != e.number() )
type = -1;
std::auto_ptr<TypeMatchExpression> temp( new TypeMatchExpression() );
Status s = temp->init( name, type );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
return StatusWithMatchExpression( temp.release() );
}
case BSONObj::opMOD:
return _parseMOD( name, e );
case BSONObj::opOPTIONS: {
// TODO: try to optimize this
// we have to do this since $options can be before or after a $regex
// but we validate here
BSONObjIterator i( context );
while ( i.more() ) {
BSONElement temp = i.next();
if ( temp.getGtLtOp( -1 ) == BSONObj::opREGEX )
return StatusWithMatchExpression( NULL );
}
return StatusWithMatchExpression( ErrorCodes::BadValue, "$options needs a $regex" );
}
case BSONObj::opREGEX: {
return _parseRegexDocument( name, context );
}
case BSONObj::opELEM_MATCH:
return _parseElemMatch( name, e );
case BSONObj::opALL:
return _parseAll( name, e );
case BSONObj::opWITHIN:
case BSONObj::opGEO_INTERSECTS:
return expressionParserGeoCallback( name, x, context );
}
return StatusWithMatchExpression( ErrorCodes::BadValue,
mongoutils::str::stream() << "not handled: " << e.fieldName() );
}
StatusWithMatchExpression MatchExpressionParser::_parseSubField( const BSONObj& context,
const char* name,
const BSONElement& e,
int position,
bool* stop ) {
*stop = false;
// TODO: these should move to getGtLtOp, or its replacement
if ( mongoutils::str::equals( "$eq", e.fieldName() ) )
return _parseComparison( name, new EqualityMatchExpression(), e );
if ( mongoutils::str::equals( "$not", e.fieldName() ) ) {
return _parseNot( name, e );
}
int x = e.getGtLtOp(-1);
switch ( x ) {
case -1:
return StatusWithMatchExpression( ErrorCodes::BadValue,
mongoutils::str::stream() << "unknown operator: "
<< e.fieldName() );
case BSONObj::LT:
return _parseComparison( name, new LTMatchExpression(), e );
case BSONObj::LTE:
return _parseComparison( name, new LTEMatchExpression(), e );
case BSONObj::GT:
return _parseComparison( name, new GTMatchExpression(), e );
case BSONObj::GTE:
return _parseComparison( name, new GTEMatchExpression(), e );
case BSONObj::NE:
return _parseComparison( name, new NEMatchExpression(), e );
case BSONObj::Equality:
return _parseComparison( name, new EqualityMatchExpression(), e );
case BSONObj::opIN: {
if ( e.type() != Array )
return StatusWithMatchExpression( ErrorCodes::BadValue, "$in needs an array" );
std::auto_ptr<InMatchExpression> temp( new InMatchExpression() );
temp->init( name );
Status s = _parseArrayFilterEntries( temp->getArrayFilterEntries(), e.Obj() );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
return StatusWithMatchExpression( temp.release() );
}
case BSONObj::NIN: {
if ( e.type() != Array )
return StatusWithMatchExpression( ErrorCodes::BadValue, "$nin needs an array" );
std::auto_ptr<NinMatchExpression> temp( new NinMatchExpression() );
temp->init( name );
Status s = _parseArrayFilterEntries( temp->getArrayFilterEntries(), e.Obj() );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
return StatusWithMatchExpression( temp.release() );
}
case BSONObj::opSIZE: {
int size = 0;
if ( e.type() == String ) {
// matching old odd semantics
size = 0;
}
else if ( e.type() == NumberInt || e.type() == NumberLong ) {
size = e.numberInt();
}
else if ( e.type() == NumberDouble ) {
if ( e.numberInt() == e.numberDouble() ) {
size = e.numberInt();
}
else {
// old semantcs require exact numeric match
// so [1,2] != 1 or 2
size = -1;
}
}
else {
return StatusWithMatchExpression( ErrorCodes::BadValue, "$size needs a number" );
}
std::auto_ptr<SizeMatchExpression> temp( new SizeMatchExpression() );
Status s = temp->init( name, size );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
return StatusWithMatchExpression( temp.release() );
}
case BSONObj::opEXISTS: {
if ( e.eoo() )
return StatusWithMatchExpression( ErrorCodes::BadValue, "$exists can't be eoo" );
std::auto_ptr<ExistsMatchExpression> temp( new ExistsMatchExpression() );
Status s = temp->init( name, e.trueValue() );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
return StatusWithMatchExpression( temp.release() );
}
case BSONObj::opTYPE: {
if ( !e.isNumber() )
return StatusWithMatchExpression( ErrorCodes::BadValue, "$type has to be a number" );
int type = e.numberInt();
if ( e.type() != NumberInt && type != e.number() )
type = -1;
std::auto_ptr<TypeMatchExpression> temp( new TypeMatchExpression() );
Status s = temp->init( name, type );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
return StatusWithMatchExpression( temp.release() );
}
case BSONObj::opMOD:
return _parseMOD( name, e );
case BSONObj::opOPTIONS:
return StatusWithMatchExpression( ErrorCodes::BadValue, "$options has to be after a $regex" );
case BSONObj::opREGEX: {
if ( position != 0 )
return StatusWithMatchExpression( ErrorCodes::BadValue, "$regex has to be first" );
*stop = true;
return _parseRegexDocument( name, context );
}
case BSONObj::opELEM_MATCH:
return _parseElemMatch( name, e );
case BSONObj::opALL:
return _parseAll( name, e );
case BSONObj::opWITHIN:
return expressionParserGeoCallback( name, context );
default:
return StatusWithMatchExpression( ErrorCodes::BadValue, "not done" );
}
}
