intrusive_ptr<Document> DocumentSourceProject::getCurrent() {
intrusive_ptr<Document> pInDocument(pSource->getCurrent());
/* create the result document */
const size_t sizeHint =
pEO->getSizeHint(pInDocument) + (excludeId ? 0 : 1);
intrusive_ptr<Document> pResultDocument(Document::create(sizeHint));
if (!excludeId) {
intrusive_ptr<const Value> pId(
pInDocument->getField(Document::idName));
/*
Previous projections could have removed _id, (or declined to
generate it) so it might already not exist. Only attempt to add
if we found it.
*/
if (pId.get())
pResultDocument->addField(Document::idName, pId);
}
/*
Use the ExpressionObject to create the base result.
If we're excluding fields at the top level, leave out the _id if
it is found, because we took care of it above.
*/
pEO->addToDocument(pResultDocument, pInDocument, true);
return pResultDocument;
}
intrusive_ptr<Document> DocumentSourceProject::getCurrent() {
intrusive_ptr<Document> pInDocument(pSource->getCurrent());
/* create the result document */
const size_t sizeHint =
pEO->getSizeHint(pInDocument) + (excludeId ? 0 : 1);
intrusive_ptr<Document> pResultDocument(Document::create(sizeHint));
if (!excludeId) {
intrusive_ptr<const Value> pId(
pInDocument->getField(Document::idName));
pResultDocument->addField(Document::idName, pId);
}
/* use the ExpressionObject to create the base result */
pEO->addToDocument(pResultDocument, pInDocument);
return pResultDocument;
}
intrusive_ptr<Document> DocumentSourceProject::getCurrent() {
intrusive_ptr<Document> pInDocument(pSource->getCurrent());
/* create the result document */
const size_t sizeHint = pEO->getSizeHint();
intrusive_ptr<Document> pResultDocument(Document::create(sizeHint));
/*
Use the ExpressionObject to create the base result.
If we're excluding fields at the top level, leave out the _id if
it is found, because we took care of it above.
*/
pEO->addToDocument(pResultDocument, pInDocument, /*root=*/pInDocument);
#if defined(_DEBUG)
if (!_simpleProjection.getSpec().isEmpty()) {
// Make sure we return the same results as Projection class
BSONObjBuilder inputBuilder;
pSource->getCurrent()->toBson(&inputBuilder);
BSONObj input = inputBuilder.done();
BSONObjBuilder outputBuilder;
pResultDocument->toBson(&outputBuilder);
BSONObj output = outputBuilder.done();
BSONObj projected = _simpleProjection.transform(input);
if (projected != output) {
log() << "$project applied incorrectly: " << getRaw() << endl;
log() << "input: " << input << endl;
log() << "out: " << output << endl;
log() << "projected: " << projected << endl;
verify(false); // exits in _DEBUG builds
}
}
#endif
return pResultDocument;
}
