text: //////////////////////////////////////////////////////////////////////////
  //
  //  Copyright (c) 2007-2011, Image Engine Design Inc. All rights reserved.
  //
  //  Redistribution and use in source and binary forms, with or without
  //  modification, are permitted provided that the following conditions are
  //  met:
  //
  //     * Redistributions of source code must retain the above copyright
  //       notice, this list of conditions and the following disclaimer.
  //
  //     * 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.
  //
  //     * Neither the name of Image Engine Design nor the names of any
  //       other contributors to this software 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 OWNER 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 IE_CORE_OSTREAMMESSAGEHANDLER_H
  #define IE_CORE_OSTREAMMESSAGEHANDLER_H
  
  #include "IECore/Export.h"
  #include "IECore/MessageHandler.h"
  
  #include <ostream>
  
  namespace IECore
  {
  
  class OStreamMessageHandler;
  IE_CORE_DECLAREPTR( OStreamMessageHandler );
  
  /// This class implements a simple MessageHandler
  /// to write to a std::ostream object.
  /// \ingroup utilityGroup
  class IECORE_API OStreamMessageHandler : public MessageHandler
  {
  
  	public :
  
  		IE_CORE_DECLAREMEMBERPTR( OStreamMessageHandler );
  
  		/// Creates a message handler to output to the specified
  		/// stream. The handler does not own the stream and will
  		/// not attempt to delete it. This form of the constructor
  		/// is intended primarily for outputing to default streams
  		/// such as std::cerr.
  		OStreamMessageHandler( std::ostream &stream );
  		/// Creates a message handler to output to the specified
  		/// stream. The handler takes ownerwship of the passed
  		/// stream and will delete it on destruction.
  		OStreamMessageHandler( std::ostream *stream );
  
  		//! @name Shared message handlers
  		/// These functions return static instances of some
  		/// default message handlers that can be shared by
  		/// everyone.
  		////////////////////////////////////////////////////////
  		//@{
  		static OStreamMessageHandler *cErrHandler();
  		static OStreamMessageHandler *cOutHandler();
  		//@}
  
  		virtual void handle( Level level, const std::string &context, const std::string &message );
  
  	protected :
  
  		virtual ~OStreamMessageHandler();
  
  
  	private :
  
  		bool m_ownStream;
  		std::ostream *m_stream;
  
  };
  
  }; // namespace IECore
  
  #endif // IE_CORE_OSTREAMMESSAGEHANDLER_H
  