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/**
* Copyright (C) 2014 MongoDB 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/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/catalog/collection_options.h"
#include "mongo/base/string_data.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
// static
bool CollectionOptions::validMaxCappedDocs(long long* max) {
if (*max <= 0 || *max == std::numeric_limits<long long>::max()) {
*max = 0x7fffffff;
return true;
}
if (*max < (0x1LL << 31)) {
return true;
}
return false;
}
void CollectionOptions::reset() {
capped = false;
cappedSize = 0;
cappedMaxDocs = 0;
initialNumExtents = 0;
initialExtentSizes.clear();
autoIndexId = DEFAULT;
// For compatibility with previous versions if the user sets no flags,
// we set Flag_UsePowerOf2Sizes in case the user downgrades.
flags = Flag_UsePowerOf2Sizes;
flagsSet = false;
temp = false;
storageEngine = BSONObj();
validator = BSONObj();
}
bool CollectionOptions::isValid() const {
return validate().isOK();
}
Status CollectionOptions::validate() const {
return CollectionOptions().parse(toBSON());
}
Status CollectionOptions::parse(const BSONObj& options) {
reset();
// During parsing, ignore some validation errors in order to accept options objects that
// were valid in previous versions of the server. SERVER-13737.
BSONObjIterator i(options);
while (i.more()) {
BSONElement e = i.next();
StringData fieldName = e.fieldName();
if (fieldName == "capped") {
capped = e.trueValue();
} else if (fieldName == "size") {
if (!e.isNumber()) {
// Ignoring for backwards compatibility.
continue;
}
cappedSize = e.numberLong();
if (cappedSize < 0)
return Status(ErrorCodes::BadValue, "size has to be >= 0");
cappedSize += 0xff;
cappedSize &= 0xffffffffffffff00LL;
} else if (fieldName == "max") {
if (!options["capped"].trueValue() || !e.isNumber()) {
// Ignoring for backwards compatibility.
continue;
}
cappedMaxDocs = e.numberLong();
if (!validMaxCappedDocs(&cappedMaxDocs))
return Status(ErrorCodes::BadValue,
"max in a capped collection has to be < 2^31 or not set");
} else if (fieldName == "$nExtents") {
if (e.type() == Array) {
BSONObjIterator j(e.Obj());
while (j.more()) {
BSONElement inner = j.next();
initialExtentSizes.push_back(inner.numberInt());
}
} else {
initialNumExtents = e.numberLong();
}
} else if (fieldName == "autoIndexId") {
if (e.trueValue())
autoIndexId = YES;
else
autoIndexId = NO;
} else if (fieldName == "flags") {
flags = e.numberInt();
flagsSet = true;
} else if (fieldName == "temp") {
temp = e.trueValue();
} else if (fieldName == "storageEngine") {
// Storage engine-specific collection options.
// "storageEngine" field must be of type "document".
// Every field inside "storageEngine" has to be a document.
// Format:
// {
// ...
// storageEngine: {
// storageEngine1: {
// ...
// },
// storageEngine2: {
// ...
// }
// },
// ...
// }
if (e.type() != mongo::Object) {
return Status(ErrorCodes::BadValue, "'storageEngine' has to be a document.");
}
BSONForEach(storageEngineElement, e.Obj()) {
StringData storageEngineName = storageEngineElement.fieldNameStringData();
if (storageEngineElement.type() != mongo::Object) {
return Status(ErrorCodes::BadValue,
str::stream() << "'storageEngine." << storageEngineName
<< "' has to be an embedded document.");
}
}
storageEngine = e.Obj().getOwned();
} else if (fieldName == "validator") {
if (e.type() != mongo::Object) {
return Status(ErrorCodes::BadValue, "'validator' has to be a document.");
}
validator = e.Obj().getOwned();
}
}
return Status::OK();
}
BSONObj CollectionOptions::toBSON() const {
BSONObjBuilder b;
if (capped) {
b.appendBool("capped", true);
b.appendNumber("size", cappedSize);
if (cappedMaxDocs)
b.appendNumber("max", cappedMaxDocs);
}
if (initialNumExtents)
b.appendNumber("$nExtents", initialNumExtents);
if (!initialExtentSizes.empty())
b.append("$nExtents", initialExtentSizes);
if (autoIndexId != DEFAULT)
b.appendBool("autoIndexId", autoIndexId == YES);
if (flagsSet)
b.append("flags", flags);
if (temp)
b.appendBool("temp", true);
if (!storageEngine.isEmpty()) {
b.append("storageEngine", storageEngine);
}
if (!validator.isEmpty()) {
b.append("validator", validator);
}
return b.obj();
}
}
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