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FlattextDocMgr.hpp

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/*==========================================================================
 *
 *  Original source copyright (c) 2001, Carnegie Mellon University.
 *  See copyright.cmu for details.
 *  Modifications copyright (c) 2002, University of Massachusetts.
 *  See copyright.umass for details.
 *
 *==========================================================================
*/

#ifndef _FLATTEXTDOCMGR_HPP
#define _FLATTEXTDOCMGR_HPP

#include "common_headers.hpp"
#include "TextHandlerManager.hpp"
#include "Exception.hpp"
#include "DocumentManager.hpp"

#define FT_SUFFIX ".flat"
#define FT_LOOKUP ".lookup"
#define FT_FID    ".fid"

class FlattextDocMgr : public DocumentManager, public TextHandler {
public:

  struct lookup_e {
    int fid;
    long offset;
    long bytes;
  };

  struct abc {
    bool operator() (char* s1, char* s2) const {
      return strcmp(s1, s2) < 0;
    }
  };

  FlattextDocMgr(string name, string mode, string source);  

  FlattextDocMgr(const string &name);

  virtual ~FlattextDocMgr();

  virtual bool open(const string &manname);

  virtual Parser* getParser() const {
    return TextHandlerManager::createParser(parseMode);
  }
  virtual const string &getMyID() const;
  
  virtual char* getDoc(const string &docID) const;

  virtual void buildMgr();

  char* handleDoc(char * docno);
  void  handleEndDoc();

protected:
  Parser* myparser;

private:
  bool readinSources(const string &fn);

  void writeTOC();

  bool loadTOC(const string &fn);
  bool loadFTLookup(const string &fn);
  bool loadFTFiles(const string &fn, int num);

  int numdocs;              // how many docs we have
  string parseMode;           // what type of parser we have
  long prevpos;              // pos of previous doc beginning
  string IDname;            // my name
  string IDnameext;         // my name with type extension
  vector<string> sources;   // list of all source files
  int fileid;                       // fileid of current file being processed
  ofstream writefpos;       // stream for writing out file positions
  mutable map<string, lookup_e*, less<string> > table; 
  lookup_e* entries;        // array of lookup entries
};

#endif

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