File indexing completed on 2024-04-14 03:49:42

 /*
     This file is part of the KDE Baloo project.
     SPDX-FileCopyrightText: 2015 Vishesh Handa <me@vhanda.in>
 
     SPDX-License-Identifier: LGPL-2.1-or-later
 */
 
 #ifndef BALOO_POSTINGDB_H
 #define BALOO_POSTINGDB_H
 
 #include "postingiterator.h"
 
 #include <QByteArray>
 #include <QVector>
 #include <QRegularExpression>
 
 #include <lmdb.h>
 
 namespace Baloo {
 
 typedef QVector<quint64> PostingList;
 
 /**
  * The PostingDB is the main database that maps <term> -> <id1> <id2> <id2> ...
  * This is used to lookup ids when searching for a <term>.
  */
 class BALOO_ENGINE_EXPORT PostingDB
 {
 public:
     PostingDB(MDB_dbi, MDB_txn* txn);
     ~PostingDB();
 
     static MDB_dbi create(MDB_txn* txn);
     static MDB_dbi open(MDB_txn* txn);
 
     void put(const QByteArray& term, const PostingList& list);
     PostingList get(const QByteArray& term);
     void del(const QByteArray& term);
 
     PostingIterator* iter(const QByteArray& term);
     PostingIterator* prefixIter(const QByteArray& term);
     PostingIterator* regexpIter(const QRegularExpression& regexp, const QByteArray& prefix);
 
     enum Comparator {
         LessEqual,
         GreaterEqual,
     };
     // For integral types only:
     template<typename T>
     typename std::enable_if<std::is_integral<T>::value, PostingIterator*>::type
     compIter(const QByteArray& prefix, T val, Comparator com) {
         qlonglong l = val;
         return compIter(prefix, l, com);
     }
     PostingIterator* compIter(const QByteArray& prefix, qlonglong val, Comparator com);
     PostingIterator* compIter(const QByteArray& prefix, double val, Comparator com);
     PostingIterator* compIter(const QByteArray& prefix, const QByteArray& val, Comparator com);
 
     QVector<QByteArray> fetchTermsStartingWith(const QByteArray& term);
 
     QMap<QByteArray, PostingList> toTestMap() const;
 private:
     template <typename Validator>
     PostingIterator* iter(const QByteArray& prefix, Validator validate);
 
     MDB_txn* m_txn;
     MDB_dbi m_dbi;
 };
 
 }
 
 #endif // BALOO_POSTINGDB_H