JSon/JComparator.hh

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#ifndef __JSON__JCOMPARATOR__
#define __JSON__JCOMPARATOR__

#include <ostream>
#include <iomanip>

#include "JSon/JSon.hh"


/**
 * \author mdejong
 */

namespace JSON {}
namespace JPP { using namespace JSON; }

namespace JSON {

  /**
   * Auxiliary data structure to compare (part of) JSon data.
   *
   * The key can be used to specify which part of the JSon data to print.\n
   * For example:
   * <pre>
   *   "Error.Code"
   * </pre>
   * will compare the error codes some specific JSon data.
   */
  struct JComparator {

    char SEPARATOR = '.';

    /**
     * Defaut constructor.
     */
    JComparator()
    {}


    /**
     * Auxiliary method to compare (part of) JSon data.
     *
     * \param  ja         JSon data
     * \param  jb         JSon data
     * \param  key        key
     */
    inline json operator()(const json& ja, const json& jb, const std::string& key) const
    {
      using namespace std;

      const size_t pos = key.find(SEPARATOR);

      if (pos != string::npos) {
        return (*this)(ja[key.substr(0,pos)], ja[key.substr(0,pos)], key.substr(pos + 1));
      } else if (key != "") {
        return json::diff(ja[key], jb[key]);
      } else {
        return json::diff(ja, jb);
      }
    }
  };
}

#endif