本文整理汇总了C++中KeySet::diff方法的典型用法代码示例。如果您正苦于以下问题：C++ KeySet::diff方法的具体用法？C++ KeySet::diff怎么用？C++ KeySet::diff使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类KeySet的用法示例。
在下文中一共展示了KeySet::diff方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: update
MojErr MojDbIndex::update(const MojObject* newObj, const MojObject* oldObj, MojDbStorageTxn* txn, bool forcedel)
{
LOG_TRACE("Entering function %s", __FUNCTION__);
MojAssert(isOpen());
MojAssert(newObj || oldObj);
// figure out which versions we include
bool includeOld = includeObj(oldObj);
bool includeNew = includeObj(newObj);
if (includeNew && !includeOld) {
// we include the new but not the old, so just put all the new keys
MojAssert(newObj);
KeySet newKeys;
MojErr err = getKeys(*newObj, newKeys);
MojErrCheck(err);
err = insertKeys(newKeys, txn);
MojErrCheck(err);
err = notifyWatches(newKeys, txn);
MojErrCheck(err);
LOG_DEBUG("[db_mojodb] IndexAdd: %s; Keys= %zu \n", this->m_name.data(), newKeys.size());
} else if (includeOld && !includeNew) {
// we include the old but not the new objects, so del all the old keys
MojAssert(oldObj);
KeySet oldKeys;
MojErr err = getKeys(*oldObj, oldKeys);
MojErrCheck(err);
err = delKeys(oldKeys, txn, forcedel);
MojErrCheck(err);
err = notifyWatches(oldKeys, txn);
MojErrCheck(err);
LOG_DEBUG("[db_mojodb] IndexDel: %s; Keys= %zu \n", this->name().data(), oldKeys.size());
} else if (includeNew && includeOld) {
// we include old and new objects
MojAssert(newObj && oldObj);
KeySet newKeys;
MojErr err = getKeys(*newObj, newKeys);
MojErrCheck(err);
KeySet oldKeys;
err = getKeys(*oldObj, oldKeys);
MojErrCheck(err);
// we need to put the keys that are in the new set, but not in the old
KeySet keysToPut;
err = newKeys.diff(oldKeys, keysToPut);
MojErrCheck(err);
// we need to del the keys that are in the old set, but not in the new
KeySet keysToDel;
err = oldKeys.diff(newKeys, keysToDel);
MojErrCheck(err);
err = insertKeys(keysToPut, txn);
MojErrCheck(err);
err = delKeys(keysToDel, txn, forcedel);
LOG_DEBUG("[db_mojodb] IndexMerge: %s; OldKeys= %zu; NewKeys= %zu; Dropped= %zu; Added= %zu ; err = %d\n",
this->name().data(), oldKeys.size(), newKeys.size(), keysToDel.size(), keysToPut.size(), (int)err);
MojErrCheck(err);
// notify on union of old and new keys
err = newKeys.put(oldKeys);
MojErrCheck(err);
err = notifyWatches(newKeys, txn);
MojErrCheck(err);
}
return MojErrNone;
}