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();
}
Status MatchExpressionParser::_parseSub( const char* name,
const BSONObj& sub,
AndMatchExpression* root ) {
int position = 0;
BSONObjIterator j( sub );
while ( j.more() ) {
BSONElement deep = j.next();
bool stop = false;
StatusWithMatchExpression s = _parseSubField( sub, name, deep, position, &stop );
if ( !s.isOK() )
return s.getStatus();
root->add( s.getValue() );
if ( stop )
break;
position++;
}
return Status::OK();
}
