/// <summary>
/// Returns an ad-hoc record containing the changes experimented by the entity since the
/// last time its internal record was captured, or null if no changes can be detected.
/// </summary>
internal static IRecord GetRecordChanges(this MetaEntity meta)
{
object obj = meta.Entity; if (obj == null)
{
return(null);
}
if (meta.UberMap == null)
{
return(null);
}
if (meta.Record == null)
{
return(null);
}
var current = new Core.Concrete.Record(meta.UberMap.Schema);
meta.UberMap.WriteRecord(obj, current);
var changes = current.Changes(meta.Record); current.Dispose();
return(changes);
}
/// <summary>
/// Generates an insert core command for the given entity, or returns null if such
/// command cannot be generated for whatever reasons.
/// </summary>
internal static IInsertCommand GenerateInsertCommand(this IUberMap map, object entity)
{
if (entity == null)
{
return(null);
}
if (map == null || map.IsDisposed || !map.IsValidated)
{
return(null);
}
IInsertCommand cmd = null;
int num = map.Schema.Count(x => !x.IsReadOnlyColumn);
if (num != 0)
{
cmd = map.Link.Engine.CreateInsertCommand(map.Link, x => map.Table);
var tag = new DynamicNode.Argument("x");
var rec = new Core.Concrete.Record(map.Schema); map.WriteRecord(entity, rec);
for (int i = 0; i < rec.Count; i++)
{
if (rec.Schema[i].IsReadOnlyColumn)
{
continue;
}
var node = new DynamicNode.SetMember(tag, rec.Schema[i].ColumnName, rec[i]);
cmd.Columns(x => node);
node.Dispose();
}
tag.Dispose();
rec.Dispose();
}
return(cmd);
}