DataStoreItem.h

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/***********************************************************************************\
* (c) Copyright 1998-2021 CERN for the benefit of the LHCb and ATLAS collaborations *
*                                                                                   *
* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
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* granted to it by virtue of its status as an Intergovernmental Organization        *
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#ifndef GAUDIKERNEL_DATASTOREITEM_H
#define GAUDIKERNEL_DATASTOREITEM_H
 
// STL include files
#include <string>
 
class DataStoreItem {
protected:
  std::string m_path;
  int m_depth;
 
public:
  DataStoreItem( std::string path, int depth = 1 ) : m_path( std::move( path ) ), m_depth( depth ) { analyse(); }
  DataStoreItem( const DataStoreItem& item ) : m_path( item.m_path ), m_depth( item.m_depth ) { analyse(); }
  virtual ~DataStoreItem() = default;
 
  bool operator==( const DataStoreItem& cmp ) const { return m_path == cmp.path() && m_depth == cmp.depth(); }
  bool operator!=( const DataStoreItem& cmp ) const { return !( m_path == cmp.path() && m_depth == cmp.depth() ); }
  DataStoreItem& operator=( const DataStoreItem& cmp ) {
    m_path  = cmp.path();
    m_depth = cmp.depth();
    analyse();
    return *this;
  }
  void analyse() {
    if ( m_path.empty() ) return;
    const size_t len = m_path.length() - 1;
    if ( m_path[len] == '*' ) {
      m_depth = 99999999;
      ( len > 0 && m_path[len - 1] == '/' ) ? m_path.erase( len - 1, 2 ) : m_path.erase( len, 1 );
    } else if ( m_path[len] == '+' ) {
      ( len > 0 && m_path[len - 1] == '/' ) ? m_path.erase( len - 1, 2 ) : m_path.erase( len, 1 );
      m_depth = 2;
    }
  }
  const std::string& path() const { return m_path; }
  int depth() const { return m_depth; }
};
#endif // GAUDIKERNEL_DATASTOREITEM_H