StatusWith<ChunkRange> ChunkRange::fromBSON(const BSONObj& obj) {
BSONElement minKey;
{
Status minKeyStatus = extractObject(obj, kMinKey, &minKey);
if (!minKeyStatus.isOK()) {
return minKeyStatus;
}
}
BSONElement maxKey;
{
Status maxKeyStatus = extractObject(obj, kMaxKey, &maxKey);
if (!maxKeyStatus.isOK()) {
return maxKeyStatus;
}
}
if (SimpleBSONObjComparator::kInstance.evaluate(minKey.Obj() >= maxKey.Obj())) {
return {ErrorCodes::FailedToParse,
str::stream() << "min: " << minKey.Obj() << " should be less than max: "
<< maxKey.Obj()};
}
return ChunkRange(minKey.Obj().getOwned(), maxKey.Obj().getOwned());
}
void bPdfIn::doc(const char* filename) {
// place cursor in the end of file:
file.open(filename, std::fstream::in | std::fstream::ate);
if(!file)
throw "Cannot open PDF file.";
// Following little hack leads us directly to the end of "startxref" keyword.
char chr = '\0';
do {
file.seekg(-2, std::ios::cur);
if(chr == 'f')
break;
} while(file.get(chr));
bPdf::getline(file); // go to the next line - with xref position
std::string xrefPosStr;
xrefPosStr = bPdf::getline(file);
size_t xrefPos = std::atoi(xrefPosStr.c_str());
if( xrefPos == 0 )
throw "bPdfIn was unable to find xref position, probably not a Pdf file.";
// Load the cross-reference table. Dictionary of xref stream will be received.
dictionary lastTrailer = loadXref(xrefPos);
// Load trailer and previous xref tables and trailers if file was updated. Tables are loaded
// in reversed chronological order so most recent entry for each object will come first for
// bPdf::getObjPos(). Old trailers are all discarded.
while(true) {
if(lastTrailer["/Type"] != "/XRef") {
// loadXref() left cursor one line after the last entry of the table. We should go back
// to extract trailer (when there is no EOL after "trailer" keyword).
chr = ' ';
do {
if(chr == '\n' || chr == '\r')
break;
file.seekg(-2, std::ios::cur);
} while(file.get(chr));
lastTrailer = bPdf::unrollDict( extractObject() );
} // if lastTrailer["/Type"] != "/XRef"
if(trailer.empty())
trailer = lastTrailer;
if(lastTrailer.count("/XRefStm") != 0) // hybrid-reference file
loadXref((size_t) atoi(lastTrailer["/XRefStm"].c_str()));
if(lastTrailer.count("/Prev") == 0)
break;
dictionary xrefDict = loadXref( (size_t)atoi(lastTrailer["/Prev"].c_str()) );
lastTrailer = xrefDict.empty() ? dictionary() : xrefDict;
}
if(xrefSections.size() == 0)
throw "bPdfIn was unable to find any cross-reference tables in file!";
}
StatusWith<ChunkType> ChunkType::fromShardBSON(const BSONObj& source, const OID& epoch) {
ChunkType chunk;
{
BSONElement minKey;
Status minKeyStatus = extractObject(source, minShardID.name(), &minKey);
if (!minKeyStatus.isOK()) {
return minKeyStatus;
}
BSONElement maxKey;
Status maxKeyStatus = extractObject(source, max.name(), &maxKey);
if (!maxKeyStatus.isOK()) {
return maxKeyStatus;
}
if (SimpleBSONObjComparator::kInstance.evaluate(minKey.Obj() >= maxKey.Obj())) {
return {ErrorCodes::FailedToParse,
str::stream() << "min: " << minKey.Obj() << " should be less than max: "
<< maxKey.Obj()};
}
chunk._min = minKey.Obj().getOwned();
chunk._max = maxKey.Obj().getOwned();
}
{
std::string chunkShard;
Status status = bsonExtractStringField(source, shard.name(), &chunkShard);
if (!status.isOK())
return status;
chunk._shard = chunkShard;
}
{
auto statusWithChunkVersion =
ChunkVersion::parseFromBSONWithFieldAndSetEpoch(source, lastmod.name(), epoch);
if (!statusWithChunkVersion.isOK()) {
return statusWithChunkVersion.getStatus();
}
chunk._version = std::move(statusWithChunkVersion.getValue());
}
return chunk;
}
