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// Description:
// Resource cache template.
//
// Copyright (C) 2001 Frank Becker
//
// This program is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation; either version 2 of the License, or (at your option) any later
// version.
//
// This program 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 General Public License for more details
//
#ifndef _ResourceCache_hpp_
#define _ResourceCache_hpp_
#include <string>
#include <hashMap.hpp>
#include <HashString.hpp>
#include <FindHash.hpp>
#include <Trace.hpp>
template< class ResourceT >
class ResourceCache
{
public:
ResourceT *getResource( const string &resourceName)
{
ResourceT *resource = findHash( resourceName, _resourceMap);
if( !resource)
{
LOG_INFO << resourceName << " not cached -> loading..." << endl;
resource = load( resourceName);
if( !resource)
{
return 0;
}
_resourceMap[ resourceName] = resource;
}
return resource;
}
virtual void reload( void)
{
#if 0
hash_map< string, ResourceT*, hash<string>, equal_to<string> >::const_iterator ci;
for( ci=_resourceMap.begin(); ci!=_resourceMap.end(); ci++)
{
ResourceT *resource = ci->second;
resource->reload();
}
#endif
}
protected:
ResourceCache( void)
{
}
virtual ~ResourceCache()
{
typename hash_map< const string, ResourceT*, hash<const string>, equal_to<const string> >::const_iterator ci;
for( ci=_resourceMap.begin(); ci!=_resourceMap.end(); ci++)
{
ResourceT *res = ci->second;
delete res;
}
_resourceMap.clear();
}
virtual ResourceT *load( const string &resource) = 0;
hash_map< const string, ResourceT*, hash<const string>, equal_to<const string> > _resourceMap;
private:
ResourceCache( const ResourceCache&);
ResourceCache &operator=(const ResourceCache&);
};
#endif
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