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/* flint_values.h: Values in flint databases
*
* Copyright 1999,2000,2001 BrightStation PLC
* Copyright 2002 Ananova Ltd
* Copyright 2002,2003,2004,2008 Olly Betts
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#ifndef OM_HGUARD_FLINT_VALUES_H
#define OM_HGUARD_FLINT_VALUES_H
#include <map>
#include <string>
#include <xapian/types.h>
#include <xapian/valueiterator.h>
#include "flint_table.h"
using namespace std;
class FlintValueTable : public FlintTable {
private:
/** Read an entry from position. Throw appropriate exceptions if
* data runs out.
*/
static void unpack_entry(const char ** pos,
const char * end,
Xapian::valueno * this_value_no,
string & this_value);
public:
/** Create a new table object.
*
* This does not create the table on disk - the create() method must
* be called before the table is created on disk
*
* This also does not open the table - the open() method must be
* called before use is made of the table.
*
* @param path_ - Path at which the table is stored.
* @param readonly_ - whether to open the table for read only
* access.
*/
FlintValueTable(const string & path_, bool readonly_)
: FlintTable("value", path_ + "/value.", readonly_, DONT_COMPRESS, true) { }
/** Encode values as a string ready to add to the table.
*/
void encode_values(string & s,
Xapian::ValueIterator it,
const Xapian::ValueIterator & end);
/** Set values for document @a did encoded as a string. */
void set_encoded_values(Xapian::docid did, const string & enc);
/** Get a value.
*
* @return The value if found, a null value otherwise.
*/
void get_value(string & value, Xapian::docid did,
Xapian::valueno slot) const;
/** Get all values.
*
* @param values A map to be filled with all the values
* for the specified document.
*
*/
void get_all_values(map<Xapian::valueno, string> & values,
Xapian::docid did) const;
/** Remove all values.
*
* @param did The document id for which to remove the values.
*
*/
void delete_all_values(Xapian::docid did);
};
#endif /* OM_HGUARD_FLINT_VALUES_H */
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