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/*
* Copyright (C) 2009-2012 Geometer Plus <[email protected]>
*
* 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 "../DBRunnables.h"
#include "../../sqldb/implsqlite/SQLiteFactory.h"
DeleteFileEntriesRunnable::DeleteFileEntriesRunnable(DBConnection &connection) {
myDeleteFileEntries = SQLiteFactory::createCommand(BooksDBQuery::DELETE_FILE_ENTRIES, connection, "@file_id", DBValue::DBINT);
myLoadFileEntryIds = SQLiteFactory::createCommand(BooksDBQuery::LOAD_FILE_ENTRY_IDS, connection, "@file_id", DBValue::DBINT);
}
bool DeleteFileEntriesRunnable::run() {
return doDelete(myFileId);
}
bool DeleteFileEntriesRunnable::doDelete(int fileId) {
(DBIntValue &) *myLoadFileEntryIds->parameter("@file_id").value() = fileId;
shared_ptr<DBDataReader> reader = myLoadFileEntryIds->executeReader();
if (reader.isNull()) {
return false;
}
std::vector<int> fileIds;
while (reader->next()) {
if (reader->type(0) != DBValue::DBINT /* file_id */ ) {
reader->close();
return false;
}
fileIds.push_back(reader->intValue(0));
}
reader->close();
if (fileIds.empty()) {
return true;
}
for (std::vector<int>::const_iterator it = fileIds.begin(); it != fileIds.end(); ++it) {
if (!doDelete(*it)) {
return false;
}
}
(DBIntValue &) *myDeleteFileEntries->parameter("@file_id").value() = fileId;
return myDeleteFileEntries->execute();
}
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