static DBColum Set(this DBColum colum, int index, object newvalue)
{
Exception gotexceptions = null;
Set(colum, CoreResolver.GetTime.Invoke(), index, newvalue, out gotexceptions);
return(colum);
}
static void Add(this DBColum colum, long time, object newvalue, out Exception exp)
{
exp = null;
try
{
if (!CoreResolver.CanUse(colum, newvalue))
{
throw new WrongParameterCodeType("{0} type isn't acceptable in colum {1}.", CoreResolver.ReturnType(newvalue.GetType()).ToString(), colum.Name);
}
if (CoreResolver.UniqueDBKey(colum))
{
if (colum.Values.Contains(newvalue))
{
throw new DuplicatedUniqueValue("{0} unique value {1} existed already.", colum.Name, newvalue);
}
}
colum.Records.Add(DBColumOrderRecord.Create(DBColumOrderRecordType.Add, time, colum, newvalue));
colum.UpdatedValue = newvalue;
colum.Values.Add(newvalue);
}
catch (Exception e)
{
exp = e;
}
}
static object Get(this DBColum colum, long time, int index)
{
if (colum.Values.Count < index)
{
return(null);
}
colum.Records.Add(DBColumOrderRecord.Create(DBColumOrderRecordType.Get, time, colum.Name, colum.Values[index], colum.DefaultValue));
return(colum.Values[index]);
}
static DBTableStruct CreateColum(this DBTableStruct table, string name, object defaultvalue, bool autoincreasment = false, bool uniquekey = false)
{
if (table.Colums.ContainsKey(name))
{
throw new Exception(string.Format("already existed table colum {0}.", name));
}
DBColum Colum = table.Colums.GetOrAdd(name, DBColum.Create(name, defaultvalue, autoincreasment, uniquekey));
if (OnCreateColum != null)
{
OnCreateColum.Invoke(table);
}
return(table);
}
static DBColum Add(this DBColum colum, object newvalue)
{
Exception gotexceptions = null;
Add(colum, CoreResolver.GetTime.Invoke(), newvalue, out gotexceptions);
if (gotexceptions is DuplicatedUniqueValue)
{
int index = colum.Values.FindIndex(p => p == newvalue);
if (index != -1)
{
Set(colum, CoreResolver.GetTime.Invoke(), index, newvalue, out gotexceptions);
}
}
return(colum);
}
public static DBColumOrderRecord Create(DBColumOrderRecordType type, long time, DBColum colum, object newvalue)
{
return(new DBColumOrderRecord()
{
Type = type,
Time = time,
Colum = colum.Name,
oldValue = colum.UpdatedValue,
newValue = newvalue
});
}
