} // Insert()
/// <summary>
///
/// </summary>
/// <param name="o"></param>
/// <param name="fullUpdate"></param>
/// <returns>number of rows affected</returns>
public Int32 Update(DataObject o, Boolean fullUpdate = false)
{
if (!o.AuthorizeUpdate())
{
throw new Exception("Not authorized for Update.");
}
DataDefinition d = o.GetDefinition();
var dv = o.ToDictionary(fullUpdate);
var PK_key = d.PrimaryKey;
var PK_value = dv[d.PrimaryKey];
dv.Remove(PK_key);
if (dv.Count == 0)
{
return(0);
}
using (IDbCommand query = CreateCommand())
{
query.CommandText = "update [" + d.DataEntity + "]";
AppendSet(query, dv);
AppendWhere(query, PK_key, "=", PK_value);
return(ExecuteNonQuery(query));
}
} // Update();
private TransactionalCollection<DataObject> GetCollection(DataObject o)
{
var collectionName = o.GetDefinition().DataEntity;
if (!Tables.ContainsKey(collectionName))
{
Tables[collectionName] = new TransactionalCollection<DataObject>();
}
return Tables[collectionName];
}
} // Find() ... (all)
/// <summary>
/// UPDATEs the provided DataObject if a PK is present, INSERTs if a PK is not present.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="o">The object to save</param>
/// <param name="fullUpdate">Whether to set nulls, 0's, and empty strings values in the update, which are otherwise ignored.</param>
/// <returns>number of rows affected</returns>
public Int32 Save(DataObject o, Boolean fullUpdate = false)
{
if (!o.Validate())
{
throw new Exception("Invalid object state for saving.");
}
DataDefinition d = o.GetDefinition();
Dictionary <String, String> v = o.ToDictionary();
if (d.PrimaryKey != null && v.ContainsKey(d.PrimaryKey) && v[d.PrimaryKey] != null)
{
return(Update(o, fullUpdate));
}
else
{
return(Insert(o, fullUpdate));
}
}
} // Update();
/// <summary>
/// Deletes DataObjects as indicated by the matching fields in the supplied object.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="o"></param>
/// <returns></returns>
public Int32 Delete(DataObject o)
{
if (!o.AuthorizeDelete())
{
throw new Exception("Not authorized for Delete.");
}
var dv = o.ToDictionary();
if (dv.Count == 0)
{
throw new Exception("No DELETE conditions were given.");
}
using (IDbCommand query = CreateCommand())
{
query.CommandText = "delete from " + o.GetDefinition().DataEntity;
AppendWhere(query, dv);
return(ExecuteNonQuery(query));
}
}
/// <summary>
///
/// </summary>
/// <param name="o"></param>
/// <param name="fullUpdate"></param>
/// <returns>number of rows affected</returns>
public Int32 Insert(DataObject o, Boolean fullUpdate = false)
{
if (!o.AuthorizeInsert())
{
throw new Exception("Not authorized for Insert.");
}
var dv = o.ToDictionary(fullUpdate);
DataDefinition d = o.GetDefinition();
Boolean GuidPK = true;
if (d.PrimaryKey != null)
{
Guid newGuid = Guid.NewGuid();
GuidPK = d.Maps[d.PrimaryKey].PropertyType.Equals(typeof(Guid));
if (GuidPK && (!dv.ContainsKey(d.PrimaryKey) || dv[d.PrimaryKey] == null || dv[d.PrimaryKey].Equals(Guid.Empty.ToString())))
{
dv[d.PrimaryKey] = newGuid.ToString();
}
}
using (IDbCommand query = CreateCommand())
{
query.CommandText = "insert into [" + o.GetDefinition().DataEntity + "]";
query.CommandText += " (" + String.Join(",", dv.Keys.ToArray()) + ")";
query.CommandText += " values (@" + String.Join(",@", dv.Keys.ToArray()) + ")";
IDbDataParameter insertid = null;
if (!GuidPK)
{
query.CommandText += " SET @insert_id = SCOPE_IDENTITY()";
insertid = query.CreateParameter();
insertid.Direction = ParameterDirection.Output;
insertid.ParameterName = "insert_id";
insertid.DbType = DbType.Int32;
insertid.Size = sizeof(Int32); // Convert.ToInt32(Math.Pow(2, 16));
query.Parameters.Add(insertid);
}
foreach (String k in dv.Keys)
{
IDbDataParameter parameter = query.CreateParameter();
parameter.ParameterName = k;
parameter.Value = dv[k] == null ? (object)DBNull.Value : (object)dv[k];
query.Parameters.Add(parameter);
}
Int32 rv = ExecuteNonQuery(query);
//
// NOTE : No idea whether the following insertid handling is correct.
// It works in my single test-case. Much more testing is required ...
//
if (rv > 0)
{
if (d.PrimaryKey != null)
{
if (GuidPK)
{
o.Populate(d.PrimaryKey, dv[d.PrimaryKey]);
}
else
{
o.Populate(d.PrimaryKey, insertid.Value.ToString());
}
}
}
return(rv);
}
} // Insert()
public JoinPath(DataObject a, DataObject b, Int32 maxNodes = 512)
: this(a.GetDefinition(), b.GetDefinition(), maxNodes)
{
}