oasisresourcemanager.h

使用stl技术,(还没看,是听说的)

/******************************************************************************
 * This source file is part of Bad Camel Gaming
 * Copyright (C) 2003  Zephie Greyvenstein
 * See Readme.html for acknowledgements
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *****************************************************************************/

/******************************************************************************
 * FILENAME    : oasisResourceManager.h
 * DESCRIPTION : The resource manager base class
 * AUTHOR      : Zephie Greyvenstein
 *****************************************************************************/

/// Avoid double inclusion
#ifndef __RESOURCEMANAGER_H__
#define __RESOURCEMANAGER_H__

/// Include common stuff
#include "oasisCommon.h"

/// Forward declare ogre stuff
namespace Ogre {
  class ArchiveEx;
  class DataChunk;
  class String;
};

namespace Oasis {
  /// The resource manager base class for loading any type of resource
  class _oasisExport resourceManager {   
  public:
    /// Constructor
    resourceManager( );
    /// Destructor
    virtual ~resourceManager( );

    /// Set the memory limit/budget in bytes
    virtual void setMemoryLimit( size bytes );

    /// Create a new resource
    virtual resource *createResource( const string &name ) = 0;
    /// Load a resource
    virtual void load( resource *res, uint8 priority );
    /// Add a resource to the manager
    virtual void add( resource *res );

    /// Unload a resource from the system
    virtual void unload( resource *res );
    /// Unload and destroy all resources for this system
    virtual void unloadAndDestroyAll( void );

  protected:
    /// Memory budget for this manager
    size memoryBudget;
  
    /// List of name indexed resources
    typedef std::map< string, resource* > resourceMap;
    /// Resources that this manager knows about. This should be a hash_map
    resourceMap resources;
  
    /// Get files of a specific name extension
    void _getAllNamesLike( const string &dirStart, 
			   const string &ex );
    /// Get a file's data
    bool _findResourceData( const string &fileName,
			    Ogre::DataChunk &chunk );

    /// Checks the memory budget
    void checkMemoryBudget( void ) {}

    /// Get a resource by name
    virtual resource *getByName( const string &name );

    /// Parse all sources
    virtual void _parseAllSources( const string &extension );
    /// Parse a source file
    virtual void _parseFile( const string &name );
    /// Parse a source file
    virtual void _parseFile( Ogre::DataChunk &chunk ) = 0;
      
    /// Logs errors in parsing
    static void _logError( const string &line, resource *file );  
  };
};

#endif