PruneDataStoreModule.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#pragma once
 
#include <framework/core/Module.h>
#include <framework/datastore/DataStore.h>
#include <string>
#include <vector>
#include <regex>
 
namespace Belle2 {
  class PruneDataStoreModule: public Module {
 
  public:

    PruneDataStoreModule();

    virtual ~PruneDataStoreModule() override = default;

    void initialize() override;

    void event() override;
 
  protected:

    static std::regex compileAndCatch(std::string& regexString);

    std::vector<std::string> m_matchEntries;

    std::vector<std::string> m_keepEntriesImplicit = {{ "EventMetaData" }};

    bool m_keepMatchedEntries = true;

    std::vector < std::regex > m_compiled_regex;

    std::vector < std::regex > m_compiled_regex_implicit;

    void updateCache(DataStore::StoreEntryMap& storemap);

    std::vector<DataStore::StoreEntry*> m_entriesToPrune;

    std::vector<const std::string*> m_entriesToKeep;

    bool m_cacheValid{false};
 
  };

} // end namespace Belle2