DmrppMetadataStore.h

// -*- mode: c++; c-basic-offset:4 -*-
 
// This file is part of Hyrax, A C++ implementation of the OPeNDAP Data
// Access Protocol.
 
// Copyright (c) 2018 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
 
#ifndef _dmrpp_metadata_store_h
#define _dmrpp_metadata_store_h
 
#include <string>
//#include <functional>
 
#include "GlobalMetadataStore.h"
 
//#include "DMRpp.h"
 
namespace libdap {
class DMR;
}
 
namespace dmrpp {
class DMRpp;
}
 
namespace bes {

class DmrppMetadataStore: public GlobalMetadataStore {
private:
    static bool d_enabled;
    static DmrppMetadataStore *d_instance;
 
    // Called by atexit()
    static void delete_instance() {
        delete d_instance;
        d_instance = 0;
    }
 
    friend class DmrppMetadataStoreTest;
 
protected:
    struct StreamDMRpp : public StreamDAP {
        StreamDMRpp(libdap::DMR *dmrpp) : StreamDAP(dmrpp) {}
        // Use the DMR to write the DMR++ when the DMR has variables of the correct
        // type. Look for this by checking the type of the object at runtime.
        virtual void operator()(std::ostream &os);
    };
 
    DmrppMetadataStore(const DmrppMetadataStore &src) : bes::GlobalMetadataStore(src) { }
 
    // Only get_instance() should be used to instantiate this class
    DmrppMetadataStore() : bes::GlobalMetadataStore() { }
    DmrppMetadataStore(const std::string &cache_dir, const std::string &prefix, unsigned long long size) :
        bes::GlobalMetadataStore(cache_dir, prefix, size) { }
 
public:
    static DmrppMetadataStore *get_instance(const std::string &cache_dir, const std::string &prefix, unsigned long long size);
    static DmrppMetadataStore *get_instance();
 
    virtual ~DmrppMetadataStore()
    {
    }
 
    virtual bool add_responses(libdap::DMR *dmrpp, const std::string &name);
    virtual bool add_dmrpp_response(libdap::DMR *dmrpp, const std::string &name);
 
    virtual libdap::DMR *get_dmr_object(const string &name);
 
    virtual dmrpp::DMRpp *get_dmrpp_object(const std::string &name);
};
 
} // namespace bes
 
#endif // _dmrpp_metadata_store_h