public bool TryFindBrother(IDataRecord rowIdentfier, out IDataRecord result)
{
result = null;
string sql = string.Format("Select * from {0} ", this.TableName);
List <string> restrictions = new List <string>();
foreach (string pkf in this.PrimaryKey)
{
int i = rowIdentfier.GetOrdinal(pkf);
Guard.Assert(i >= 0);
System.Type t = rowIdentfier.GetFieldType(i);
restrictions.Add(string.Format("{0}={1}", pkf, SqliteExpression.GetExpressionString(rowIdentfier.GetValue(i), t)));
}
Guard.Assert(restrictions.Count > 0);
string where = string.Join(" AND ", restrictions);
string resolved = sql + "WHERE " + where;
bool enforceDispose = true;
IDataReader r = this.Connection.ExecuteReader(resolved);
try
{
bool b = r.Read();
if (b)
{
#if DEBUG
long recordcount = this.Connection.ExecuteScalarAsLong(string.Format("SELECT COUNT(*) FROM {0} WHERE {1}", this.TableName, where));
Guard.Assert(recordcount == 1, "extly one expected");
#endif
enforceDispose = false;
result = r;
return(true);
}
else
{
result = null;
Guard.Assert(enforceDispose);
return(false);
}
}
finally
{
if (enforceDispose)
{
r.Dispose();
}
}
}
public IEnumerable <string> GetInsertStatements(IEnumerable <Tuple <JObject, string> > nodes)
{
Guard.ArgumentNotNull(nodes, nameof(nodes));
//Guard.ArgumentNotNull(rows, "rows");
string insertTemplate = "INSERT INTO {0} ({1}) values ({2});";
string columnNames = string.Join(", ", this.Columns.Keys);
foreach (Tuple <JObject, string> node in nodes)
{
Guard.AssertNotNull(node.Item1);
Guard.AssertNotNull(node.Item2);
List <string> rowValues = new List <string>();
foreach (string prop in this.Columns.Keys)
{
if (prop == "owner")
{
rowValues.Add(SqliteExpression.GetExpressionString(node.Item2, typeof(string)));
}
else
{
string cv = node.Item1[prop].ToString();
System.Type t = typeof(string);
if ((prop == "isPrivate") || (prop.StartsWith("is_"))) //FB is using "is_" pattern!
{
int isp = 0;
if (cv.ToLowerInvariant().Contains("tr"))
{
isp = 1;
}
rowValues.Add(SqliteExpression.GetExpressionString(isp, typeof(int)));
}
else
{
rowValues.Add(SqliteExpression.GetExpressionString(cv, typeof(string)));
}
}
}
string serializedRowValues = string.Join(", ", rowValues);
yield return(string.Format(insertTemplate, this.TableName, columnNames, serializedRowValues));
} //nodes
}
