QueryChain.h

/*
 Copyright © CloudBackend AB 2020-2023.
 */
 
#ifndef INCLUDE_CBE_QUERYCHAIN_H_
#define INCLUDE_CBE_QUERYCHAIN_H_
 
#include "cbe/delegate/JoinDelegate.h"
 
#include "cbe/Types.h"
#include "cbe/Filter.h"
 
#include <string>
 
namespace CBI {
class QueryChain;
using QueryChainPtr = std::shared_ptr<CBI::QueryChain>;
} // namespace CBI
 
namespace cbe {
 
class QueryChain {
public:
  using JoinDelegatePtr = delegate::JoinDelegatePtr;
  QueryChain join(Container       containerToQuery,
                  std::string     key1,
                  std::string     key2,
                  JoinDelegatePtr joinDelegate);
  QueryChain join(Container       containerToQuery,
                  std::string     key1,
                  std::string     key2,
                  Filter          constraints,
                  JoinDelegatePtr joinDelegate);
  QueryChain join(Container       containerToQuery,
                  std::string     key1,
                  std::string     key2,
                  Container       containerForResults,
                  JoinDelegatePtr joinDelegate);
  QueryChain join(Container       containerToQuery,
                  std::string     key1,
                  std::string     key2,
                  Filter          constraints,
                  Container       containerForResults,
                  JoinDelegatePtr joinDelegate);
 
  QueryResult getQueryResult() const;
 
  QueryChain(cbe::DefaultCtor);
  ~QueryChain();
 
  struct Exception : cbe::util::Exception {
    // Inherit base class' constructor
    using cbe::util::Exception::Exception;
  };
 
  explicit operator bool() const;
private:
  struct Impl;
  std::shared_ptr<Impl> pImpl{};
 
  friend class CloudBackend;
  friend class Container;
  friend class QueryChainSync;
  QueryChain(CBI::QueryChainPtr cbiPeerPtr);
  CBI::QueryChain& getCbiPeer() const;
}; // class QueryChain
 
class QueryChainExt : public QueryChain {
public:
  using QueryChain::join; // Bring in the join()- methods from the base class
 
  QueryChainExt join(Container    containerToQuery,
                     std::string  key1,
                     std::string  key2);
  QueryChainExt join(Container    containerToQuery,
                     std::string  key1,
                     std::string  key2,
                     Filter       constraints);
  QueryChainExt join(Container    containerToQuery,
                     std::string  key1,
                     std::string  key2,
                     Container    containerForResults);
  QueryChainExt join(Container    containerToQuery,
                     std::string  key1,
                     std::string  key2,
                     Filter       constraints,
                     Container    containerForResults);
private:
  friend class CloudBackend;
  friend class Container;
  // Inherit base class' constructor
  using QueryChain::QueryChain;
 
  QueryChainExt(QueryChain&& rh);
}; // class QueryChainExt
 
} // namespace cbe
 
#endif // INCLUDE_CBE_ACCOUNT_H_