3dpcp/.svn/pristine/a6/a6a7bbefb3eb454964143b7318497046966077c1.svn-base
2012-09-16 14:33:11 +02:00

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/**
* @file
* @brief
*
* @author Thomas Escher
*/
#ifndef TEMPORARY_HANDLER_H
#define TEMPORARY_HANDLER_H
#include "scanserver/cache/cacheHandler.h"
#include "scanserver/sharedScan.h"
#include "scanserver/cacheIO.h"
/**
* @brief CacheHandler for artificially created CacheObjects by reduction in SharedScan.
*
* This handler saves and loads the contents of a CacheObject with arbitrary contents via CacheIO.
*/
class TemporaryHandler : public CacheHandler
{
public:
/**
* Constructor
* @param static_data determines overwriting policy. Set false for changing data, true for static write-only-once data.
*/
TemporaryHandler(CacheObject* obj, CacheManager* cm, SharedScan* scan, bool static_data = false);
/**
* Deserialize data from a file if it exists and written flag is set, otherwise does nothing
* @return whether written flag was set and file was found and loaded
*/
virtual bool load();
/**
* Serialize all data into a file
* It will do so if either the written flag isn't set, or static data flag isn't set regardless of the written flag.
*/
virtual void save(unsigned char* data, unsigned int size);
//! Reset flag for having a cached file, causing reads to fail and saves to overwrite older files.
virtual void invalidate() { m_written = false; }
protected:
SharedScan* m_scan;
private:
CacheIO::IDType m_id;
bool m_written, m_static_data;
};
#endif //TEMPORARY_HANDLER_H