text: /*
   * Copyright (c) 2013, The University of Oxford
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   * 1. Redistributions of source code must retain the above copyright notice,
   *    this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   * 3. Neither the name of the University of Oxford nor the names of its
   *    contributors may be used to endorse or promote products derived from this
   *    software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef SERVICEDATAREQUEST_H
  #define SERVICEDATAREQUEST_H
  
  /**
   * @file ServiceDataRequest.h
   */
  
  #include <QtCore/QHash>
  #include "ServerRequest.h"
  
  namespace pelican {
  
  /**
   * @ingroup c_comms
   *
   * @class ServiceDataRequest
   *
   * @brief
   * A request for a specific version of service data.
   *
   * @details
   */
  
  class ServiceDataRequest : public ServerRequest
  {
      public:
          ServiceDataRequest();
          ~ServiceDataRequest();
  
      public:
          /// Adds a request for the data object of the specified type and version.
          void request(const QString& type, const QString& version);
  
          /// Return a list of data types in the request.
          QList<QString> types() const;
  
          /// Return the version of a specific type n.b only one version per type
          /// allowed per request.
          QString version(const QString& type) const;
  
          /// Returns true if n valid requests() calls have been made.
          bool isEmpty() const;
  
          /// Test for equality between ServiceData objects.
          bool operator==(const ServiceDataRequest&) const;
  
          virtual bool operator==(const ServerRequest&) const;
  
      private:
          QHash<QString,QString> _dataRequested;
  };
  
  } // namespace pelican
  #endif // SERVICEDATAREQUEST_H
  