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/*
* Copyright (C) 2003-2015 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "LazyDatabase.hxx"
#include "db/Interface.hxx"
#include <assert.h>
LazyDatabase::LazyDatabase(Database *_db)
:Database(_db->GetPlugin()), db(_db), open(false) {}
LazyDatabase::~LazyDatabase()
{
assert(!open);
delete db;
}
bool
LazyDatabase::EnsureOpen(Error &error) const
{
if (open)
return true;
if (!db->Open(error))
return false;
open = true;
return true;
}
void
LazyDatabase::Close()
{
if (open) {
open = false;
db->Close();
}
}
const LightSong *
LazyDatabase::GetSong(const char *uri, Error &error) const
{
return EnsureOpen(error)
? db->GetSong(uri, error)
: nullptr;
}
void
LazyDatabase::ReturnSong(const LightSong *song) const
{
assert(open);
db->ReturnSong(song);
}
bool
LazyDatabase::Visit(const DatabaseSelection &selection,
VisitDirectory visit_directory,
VisitSong visit_song,
VisitPlaylist visit_playlist,
Error &error) const
{
return EnsureOpen(error) &&
db->Visit(selection, visit_directory, visit_song,
visit_playlist, error);
}
bool
LazyDatabase::VisitUniqueTags(const DatabaseSelection &selection,
TagType tag_type, uint32_t group_mask,
VisitTag visit_tag,
Error &error) const
{
return EnsureOpen(error) &&
db->VisitUniqueTags(selection, tag_type, group_mask, visit_tag,
error);
}
bool
LazyDatabase::GetStats(const DatabaseSelection &selection,
DatabaseStats &stats, Error &error) const
{
return EnsureOpen(error) && db->GetStats(selection, stats, error);
}
time_t
LazyDatabase::GetUpdateStamp() const
{
return open ? db->GetUpdateStamp() : 0;
}
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