本文整理汇总了C++中ObjectSet::diff方法的典型用法代码示例。如果您正苦于以下问题：C++ ObjectSet::diff方法的具体用法？C++ ObjectSet::diff怎么用？C++ ObjectSet::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ObjectSet的用法示例。
在下文中一共展示了ObjectSet::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: configureIndexes
MojErr MojDbKind::configureIndexes(const MojObject& obj, const MojString& locale, MojDbReq& req)
{
MojLogTrace(s_log);
// make sure indexes changes count against our usage
MojErr err = req.curKind(this);
MojErrCheck(err);
// add default id index to set
MojObject idIndex;
err = idIndex.fromJson(IdIndexJson);
MojErrCheck(err);
ObjectSet newIndexObjects;
err = newIndexObjects.put(idIndex);
MojErrCheck(err);
// change back to a set and use contains
MojSet<MojString> indexNames;
MojString defaultIdxName;
err = defaultIdxName.assign(IdIndexName);
MojErrCheck(err);
err = indexNames.put(defaultIdxName);
MojErrCheck(err);
// add indexes to set to uniquify and order them
MojObject indexArray;
if (obj.get(IndexesKey, indexArray)) {
MojObject::ConstArrayIterator end = indexArray.arrayEnd();
for (MojObject::ConstArrayIterator i = indexArray.arrayBegin(); i != end; ++i) {
MojString indexName;
err = i->getRequired(MojDbIndex::NameKey, indexName);
MojErrCheck(err);
err = indexName.toLower();
MojErrCheck(err);
if (!indexNames.contains(indexName)) {
MojObject idx = *i;
// make sure we keep the lower-cased index name
err = idx.putString(MojDbIndex::NameKey, indexName);
MojErrCheck(err);
err = newIndexObjects.put(idx);
MojErrCheck(err);
err = indexNames.put(indexName);
MojErrCheck(err);
} else {
MojErrThrowMsg(MojErrDbInvalidIndexName, _T("db: cannot repeat index name: '%s'"), indexName.data());
}
}
}
// figure out what to add and what to delete
ObjectSet toDrop;
err = m_indexObjects.diff(newIndexObjects, toDrop);
MojErrCheck(err);
ObjectSet toAdd;
err = newIndexObjects.diff(m_indexObjects, toAdd);
MojErrCheck(err);
// drop deleted indexes
IndexVec newIndexes;
for (IndexVec::ConstIterator i = m_indexes.begin(); i != m_indexes.end(); ++i) {
if (toDrop.contains((*i)->object())) {
err = dropIndex(i->get(), req);
MojErrCheck(err);
} else {
err = newIndexes.push(*i);
MojErrCheck(err);
}
}
// add new indexes
for (ObjectSet::ConstIterator i = toAdd.begin(); i != toAdd.end(); ++i) {
// create index
MojRefCountedPtr<MojDbIndex> index(new MojDbIndex(this, m_kindEngine));
MojAllocCheck(index.get());
err = index->fromObject(*i, locale);
MojErrCheck(err);
// open index
err = openIndex(index.get(), req);
MojErrCheck(err);
err = newIndexes.push(index);
MojErrCheck(err);
}
// sort indexes by the prop vec so that for indexes that share prop prefixes, the shortest one comes first
err = newIndexes.sort();
MojErrCheck(err);
// update members
m_indexObjects = newIndexObjects;
m_indexes = newIndexes;
return MojErrNone;
}