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/*
SQLite3Context.m
Copyright (C) 2006 Free Software Foundation, Inc.
Author: Matt Rice <ratmice@gmail.com>
Date: 2006
This file is part of the GNUstep Database Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; see the file COPYING.LIB.
If not, write to the Free Software Foundation,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <GNUstepBase/GNUstep.h>
#include "SQLite3Adaptor.h"
#include "SQLite3Context.h"
#include "SQLite3Channel.h"
@implementation SQLite3Context
- (EOAdaptorChannel *)createAdaptorChannel
{
return AUTORELEASE([[SQLite3Channel alloc] initWithAdaptorContext:self]);
}
- (void)beginTransaction
{
int i, c;
NSAssert(![self transactionNestingLevel], @"nested transactions unsupported");
NSAssert([self hasOpenChannels], @"no open channels");
NSAssert(![self hasBusyChannels], @"busy channels during commit.");
if (_delegateRespondsTo.shouldBegin)
{
NSAssert([_delegate adaptorContextShouldBegin: self],
@"delegate refuses");
}
for (i = 0, c = [_channels count]; i < c; i++)
{
id channel = [[_channels objectAtIndex:i] nonretainedObjectValue];
if ([channel isOpen])
{
[channel evaluateExpression:
[EOSQLExpression expressionForString:@"BEGIN TRANSACTION"]];
break;
}
}
[self transactionDidBegin];
if (_delegateRespondsTo.didBegin)
[_delegate adaptorContextDidBegin: self];
}
- (void) commitTransaction
{
int i, c;
NSAssert([self hasOpenTransaction], @"No open transactions to commit");
NSAssert(![self hasBusyChannels], @"busy channels during commit");
if (_delegateRespondsTo.shouldCommit)
NSAssert([_delegate adaptorContextShouldCommit:self], @"delegate refuses to commit");
for (i = 0, c = [_channels count]; i < c; i++)
{
id channel = [[_channels objectAtIndex:i] nonretainedObjectValue];
if ([channel isOpen])
{
[channel evaluateExpression:
[EOSQLExpression expressionForString:@"COMMIT TRANSACTION"]];
break;
}
}
[self transactionDidCommit];
if (_delegateRespondsTo.didCommit)
[_delegate adaptorContextDidCommit: self];
}
- (void) rollbackTransaction
{
int i, c;
NSAssert([self hasOpenTransaction], @"No open transactions to rollback");
NSAssert(![self hasBusyChannels], @"busy channels during rollback");
if (_delegateRespondsTo.shouldRollback)
NSAssert([_delegate adaptorContextShouldRollback:self], @"delegate refuses to rollback");
for (i = 0, c = [_channels count]; i < c; i++)
{
id channel = [[_channels objectAtIndex:i] nonretainedObjectValue];
if ([channel isOpen])
{
[channel evaluateExpression:
[EOSQLExpression expressionForString:@"ROLLBACK TRANSACTION"]];
break;
}
}
[self transactionDidCommit];
if (_delegateRespondsTo.didRollback)
[_delegate adaptorContextDidRollback: self];
}
@end
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