// $Id: master-header,v 1.11 2002-11-25 13:33:22 mike Exp $
//
// ZOOM C++ Binding.
// The ZOOM homepage is at http://zoom.z3950.org/
//
// Derived from version 1.0g at
//	http://zoom.z3950.org/bind/cplusplus/zoom-1.0g.hh

#include <stddef.h>		// for size_t
#include <string>


*/*
* * This is a bit stupid.  The fact that our ZOOM-C++ implementation is
* * based on the ZOOM-C implementation is our Dirty Little Secret, and
* * there is in principle no reason why client code need be bothered
* * with it.  Except of course that the public class declarations in
* * C++ have to lay their private parts out for the world to see
* * (oo-er).  Hence the inclusion of <yaz/zoom.h>
* */
*#include <yaz/zoom.h>
*
namespace ZOOM {
  // Forward declarations for type names.
  class YAZ_EXPORT query;
  class YAZ_EXPORT resultSet;
  class YAZ_EXPORT record;

  class YAZ_EXPORT connection {
*   ZOOM_connection c;
*   friend class resultSet; // so it can use _getYazConnection()
*   ZOOM_connection _getYazConnection () const { return c; }
    // connections are non-copyable.
    connection (const connection &);
    connection &operator= (const connection &);
  public:
    connection ();
    connection (const std::string &hostname, int portnum);
    ~connection ();
    void connect (const std::string &hostname, int portnum);
    std::string option (const std::string &key) const;
    bool option (const std::string &key, const std::string &val);
  };

  class query {
      // base class for all query types
*   friend class resultSet; // so it can use _getYazQuery()
*   ZOOM_query _getYazQuery () const { return q; }
* protected:
*   ZOOM_query q;
  public:
    virtual ~query ();
  };

  class YAZ_EXPORT prefixQuery : public query {
  public:
    prefixQuery (const std::string &pqn);
    ~prefixQuery ();
  };

  class YAZ_EXPORT CCLQuery : public query {
  public:
    CCLQuery (const std::string &ccl, void *qualset);
    ~CCLQuery ();
  };

  class YAZ_EXPORT resultSet {
*   connection &owner;
*   ZOOM_resultset rs;
    // resultSets are non-copyable.
    resultSet (const resultSet &);
    resultSet &operator= (const resultSet &);
  public:
    resultSet (connection &c, const query &q);
    ~resultSet ();
    std::string option (const std::string &key) const;
    bool option (const std::string &key, const std::string &val);
    size_t size () const;
  };

  class YAZ_EXPORT record {
*   const resultSet *owner;
*   ZOOM_record r;
*   friend class resultSet; // so it can use this constructor
*   record::record (const resultSet *rs, ZOOM_record rec):
*	owner (rs), r (rec) {}
  public:
    class syntax {
    public:
      enum value {
	UNKNOWN, GRS1, SUTRS, USMARC, UKMARC, XML
      };
      syntax (value rs) : i(rs) {};
      operator std::string () const;
      bool operator== (const syntax &s) const;
      bool operator== (value rs) const;
      operator value () const;
    };

    record (resultSet &rs, size_t num);
    ~record ();
    syntax recsyn () const;
    std::string render () const;
    std::string rawdata () const;
  };

  // Base exception class; from which all other ZOOM exceptions
  // are derived. Other classes that use this as their base
  // class may want to provide their own errcode() and errmsg()
  // functions -- hence they are made virtual.
  class YAZ_EXPORT exception {
* protected:
*   int code;
  public:
    exception (int code);
    virtual ~exception ();
    virtual int errcode () const;
    virtual std::string errmsg () const;
  };

  // systemException could be thrown for timeouts, protocol errors,
  // network outages.
  class YAZ_EXPORT systemException : public exception {
  public:
    systemException ();		// Uses value of system `errno'
    systemException (int code);
  };

  // bib1Exception::errcode() returns a code from the
  // Bib-1 Diagnostic Set.
  class YAZ_EXPORT bib1Exception: public exception {
*   const char *info;
  public:
*   ~bib1Exception ();
    bib1Exception (int code, const std::string &addinfo);
    std::string addinfo () const;
  };

  class YAZ_EXPORT queryException : public exception {
*   const char *q;
  public:
*   ~queryException ();
    enum { PREFIX, CCL };
    queryException (int qtype, const std::string &source);
    std::string addinfo () const;
  };
}