public void AddGene(Gene gene)
{
var genesAffected = new EvolutionHistoryBuilder();
genesAffected.Append(gene);
string[] rollbackSql = gene.GenerateRollbackSql(genesAffected, this);
var mementos = genesAffected.EvolutionHistory.GetMementos().ToList();
string[] deleteStatements = GenerateDeleteStatements(_databaseName, mementos);
_sql = _sql.InsertRange(0, deleteStatements);
_sql = _sql.InsertRange(0, rollbackSql);
_ahead = _ahead.Subtract(genesAffected.EvolutionHistory);
}
public bool AddGene(Gene gene)
{
if (_working.Contains(gene))
{
return(false);
}
foreach (var prerequisite in gene.AllPrerequisites
.Where(p => _difference.Contains(p)))
{
if (!AddGene(prerequisite))
{
return(false);
}
}
_working = _working.Push(gene);
var genesAffected = new EvolutionHistoryBuilder();
genesAffected.Append(gene);
string[] result = gene.GenerateSql(genesAffected, this);
_sql = _sql.AddRange(result);
var mementos = genesAffected.EvolutionHistory.GetMementos().ToList();
_sql = _sql.Add(GenerateInsertStatement(_databaseName, mementos));
if (mementos.SelectMany(m => m.Prerequisites).SelectMany(p => p.Value).Any())
{
_sql = _sql.Add(GeneratePrerequisiteInsertStatements(_databaseName, mementos));
}
_difference = _difference.Subtract(genesAffected.EvolutionHistory);
_working = _working.Pop();
return(true);
}
public RollbackGenerator(string databaseName, EvolutionDelta ahead)
{
_databaseName = databaseName;
_ahead = ahead;
}
public ForwardGenerator(string databaseName, EvolutionDelta difference)
{
_databaseName = databaseName;
_difference = difference;
}