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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/>.
*
* 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/db/index_legacy.h"
#include "mongo/db/client.h"
#include "mongo/db/fts/fts_enabled.h"
#include "mongo/db/fts/fts_spec.h"
#include "mongo/db/index_names.h"
#include "mongo/db/index/catalog_hack.h"
#include "mongo/db/index/hash_access_method.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/namespace_details.h"
namespace mongo {
// static
BSONObj IndexLegacy::adjustIndexSpecObject(const BSONObj& obj) {
string pluginName = IndexNames::findPluginName(obj.getObjectField("key"));
if (IndexNames::TEXT == pluginName || IndexNames::TEXT_INTERNAL == pluginName) {
StringData desc = cc().desc();
if (desc.find("conn") == 0) {
// this is to make sure we only complain for users
// if you do get a text index created an a primary
// want it to index on the secondary as well
massert(16811, "text search not enabled", fts::isTextSearchEnabled() );
}
return fts::FTSSpec::fixSpec(obj);
}
return obj;
}
// static
BSONObj IndexLegacy::getMissingField(const BSONObj& infoObj) {
if (IndexNames::HASHED == CatalogHack::getAccessMethodName(infoObj.getObjectField("key"))) {
int hashVersion = infoObj["hashVersion"].numberInt();
HashSeed seed = infoObj["seed"].numberInt();
// Explicit null valued fields and missing fields are both represented in hashed indexes
// using the hash value of the null BSONElement. This is partly for historical reasons
// (hash of null was used in the initial release of hashed indexes and changing would
// alter the data format). Additionally, in certain places the hashed index code and
// the index bound calculation code assume null and missing are indexed identically.
BSONObj nullObj = BSON("" << BSONNULL);
return BSON("" << HashAccessMethod::makeSingleKey(nullObj.firstElement(), seed,
hashVersion));
}
else {
BSONObjBuilder b;
b.appendNull("");
return b.obj();
}
}
// static
void IndexLegacy::postBuildHook(NamespaceDetails* tableToIndex, const IndexDetails& idx) {
// If it's an FTS index, we want to set the power of 2 flag.
string pluginName = CatalogHack::getAccessMethodName(idx.keyPattern());
if (IndexNames::TEXT == pluginName || IndexNames::TEXT_INTERNAL == pluginName) {
if (tableToIndex->setUserFlag(NamespaceDetails::Flag_UsePowerOf2Sizes)) {
tableToIndex->syncUserFlags(idx.parentNS());
}
}
}
} // namespace mongo
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