text: //----------------------------------------------------------------------------
  // File: ossimFileProcessorInterface.h
  // 
  // License:  MIT
  // 
  // See LICENSE.txt file in the top level directory for more details.
  //
  // Author:  David Burken
  //
  // Description: Class interface ossimMetadataInterface.
  //
  // Has pure virtual "addMetadata" method that derived classes must
  // implement to be concrete.
  // 
  //----------------------------------------------------------------------------
  // $Id$
  
  #ifndef ossimMetadataInterface_HEADER
  #define ossimMetadataInterface_HEADER 1
  
  #include <string>
  
  class ossimKeywordlist;
  
  /** @class ossimMetadataInterface */
  class ossimMetadataInterface
  {
  public:
     
     /** @brief default constructor */
     ossimMetadataInterface(){}
  
     /** @brief virtual destructor. */
     virtual ~ossimMetadataInterface(){}
  
     /**
      * @brief Pure virtual addMetadata method. Derived classed must implement.
      * @param kwl Initialized by this.
      * @param prefix e.g. "image0." (can be empty)
      */
     virtual void addMetadata( ossimKeywordlist* kwl,
                               const std::string& prefix ) const = 0;
  };
  
  #endif /* #ifndef ossimMetadataInterface_HEADER */
  