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// expression_internal.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/>.
*/
#include "mongo/db/matcher/expression_internal.h"
namespace mongo {
bool isAllDigits( const StringData& str ) {
for ( unsigned i = 0; i < str.size(); i++ ) {
if ( !isdigit( str[i] ) )
return false;
}
return true;
}
string pathToString( const FieldRef& path, int32_t size ) {
string res;
if ( (size_t)size > path.numParts() ) {
return res;
}
res = path.getPart( size ).toString();
for (size_t i = (size_t)size + 1; i < path.numParts(); i++ ) {
res += ".";
res += path.getPart( i ).toString();
}
return res;
}
BSONElement getFieldDottedOrArray( const BSONObj& doc,
const FieldRef& path,
int32_t* idxPath,
bool* inArray ) {
BSONElement res;
BSONObj curr = doc;
bool stop = false;
size_t partNum = 0;
while ( partNum < path.numParts() && !stop ) {
res = curr.getField( path.getPart( partNum ) );
switch ( res.type() ) {
case EOO:
stop = true;
break;
case Object:
curr = res.Obj();
++partNum;
break;
case Array:
if ( partNum+1 < path.numParts() && isAllDigits( path.getPart( partNum+1 ) ) ) {
*inArray = true;
curr = res.Obj();
++partNum;
}
else {
stop = true;
}
break;
default:
if ( partNum+1 < path.numParts() ) {
res = BSONElement();
}
stop = true;
}
}
*idxPath = partNum;
return res;
}
} // namespace mongo
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