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/**
* 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/exec/working_set.h"
#include "mongo/db/index/index_descriptor.h"
namespace mongo {
const WorkingSetID WorkingSet::INVALID_ID = -1;
WorkingSet::WorkingSet() : _nextId(0) { }
WorkingSet::~WorkingSet() {
for (DataMap::const_iterator i = _data.begin(); i != _data.end(); ++i) {
delete i->second;
}
}
WorkingSetID WorkingSet::allocate() {
verify(_data.end() == _data.find(_nextId));
_data[_nextId] = new WorkingSetMember();
return _nextId++;
}
WorkingSetMember* WorkingSet::get(const WorkingSetID& i) {
DataMap::iterator it = _data.find(i);
verify(_data.end() != it);
return it->second;
}
void WorkingSet::free(const WorkingSetID& i) {
DataMap::iterator it = _data.find(i);
verify(_data.end() != it);
delete it->second;
_data.erase(it);
}
WorkingSetMember::WorkingSetMember() : state(WorkingSetMember::INVALID) { }
bool WorkingSetMember::hasLoc() const {
return state == LOC_AND_IDX || state == LOC_AND_UNOWNED_OBJ
|| state == LOC_AND_OWNED_OBJ;
}
bool WorkingSetMember::hasObj() const {
return hasOwnedObj() || hasUnownedObj();
}
bool WorkingSetMember::hasOwnedObj() const {
return state == OWNED_OBJ || state == LOC_AND_OWNED_OBJ;
}
bool WorkingSetMember::hasUnownedObj() const {
return state == LOC_AND_UNOWNED_OBJ;
}
bool WorkingSetMember::getFieldDotted(const string& field, BSONElement* out) {
// If our state is such that we have an object, use it.
if (hasObj()) {
*out = obj.getFieldDotted(field);
return true;
}
// Our state should be such that we have index data/are covered.
for (size_t i = 0; i < keyData.size(); ++i) {
BSONObjIterator keyPatternIt(keyData[i].indexKeyPattern);
BSONObjIterator keyDataIt(keyData[i].keyData);
while (keyPatternIt.more()) {
BSONElement keyPatternElt = keyPatternIt.next();
verify(keyDataIt.more());
BSONElement keyDataElt = keyDataIt.next();
if (field == keyPatternElt.fieldName()) {
*out = keyDataElt;
return true;
}
}
}
return false;
}
} // namespace mongo
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