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/** @file chert_termlisttable.h
* @brief Subclass of ChertTable which holds termlists.
*/
/* Copyright (C) 2007,2008,2009 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 XAPIAN_INCLUDED_CHERT_TERMLISTTABLE_H
#define XAPIAN_INCLUDED_CHERT_TERMLISTTABLE_H
#include <xapian/types.h>
#include "chert_lazytable.h"
#include "pack.h"
#include <string>
namespace Xapian {
class Document;
}
class ChertTermListTable : public ChertLazyTable {
public:
static std::string make_key(Xapian::docid did) {
std::string key;
C_pack_uint_preserving_sort(key, did);
return key;
}
/** Create a new ChertTermListTable object.
*
* This method does not create or open the table on disk - you
* must call the create() or open() methods respectively!
*
* @param dbdir The directory the chert database is stored in.
* @param readonly true if we're opening read-only, else false.
*/
ChertTermListTable(const std::string & dbdir, bool readonly)
: ChertLazyTable("termlist", dbdir + "/termlist.", readonly,
Z_DEFAULT_STRATEGY) { }
/** Set the termlist data for document @a did.
*
* Any existing data is replaced.
*
* @param did The docid to set the termlist data for.
* @param doc The Xapian::Document object to read term data from.
* @param doclen The document length.
*/
void set_termlist(Xapian::docid did, const Xapian::Document & doc,
chert_doclen_t doclen);
/** Delete the termlist data for document @a did.
*
* @param did The docid to delete the termlist data for.
*/
void delete_termlist(Xapian::docid did) { del(make_key(did)); }
/** Non-lazy override of ChertLazyTable::create_and_open().
*
* Don't create lazily, but if the termlist is deleted, work without it.
*
* This method isn't virtual, but we never call it such that it needs to
* be.
*/
void create_and_open(unsigned int blocksize) {
ChertTable::create_and_open(blocksize);
}
};
#endif // XAPIAN_INCLUDED_CHERT_TERMLISTTABLE_H
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