public static bool TryFindPrimaryKeyColumnValue(AutoIdentityDAC.PrimaryKeyConvention convention, string tableName, IEnumerable <ColumnValue> clause, out ColumnValue primaryKeyColumnValue)
{
if (!convention.HasAnyFlags(AutoIdentityDAC.PrimaryKeyConvention.Numeric, AutoIdentityDAC.PrimaryKeyConvention.Guid, AutoIdentityDAC.PrimaryKeyConvention.String))
{
throw new ArgumentException("Primary key convention does not specify a datatype");
}
if (!convention.HasAnyFlags(AutoIdentityDAC.PrimaryKeyConvention.ID, AutoIdentityDAC.PrimaryKeyConvention.Id, AutoIdentityDAC.PrimaryKeyConvention.TableNameID, AutoIdentityDAC.PrimaryKeyConvention.TableNameId, AutoIdentityDAC.PrimaryKeyConvention.UseDatabaseStructure))
{
throw new ArgumentException("Primary key convention does not specify a naming convention");
}
var clauseHash = clause.ToDictionary(val => val.ColumnName);
primaryKeyColumnValue = null;
if (convention.HasFlag(AutoIdentityDAC.PrimaryKeyConvention.ID) && clauseHash.ContainsKey("ID"))
{
primaryKeyColumnValue = clauseHash["ID"];
}
else if (convention.HasFlag(AutoIdentityDAC.PrimaryKeyConvention.Id) && clauseHash.ContainsKey("Id"))
{
primaryKeyColumnValue = clauseHash["ID"];
}
else if (convention.HasFlag(AutoIdentityDAC.PrimaryKeyConvention.TableNameID) && clauseHash.ContainsKey("{0}ID".FormatWith(tableName)))
{
primaryKeyColumnValue = clauseHash["ID"];
}
else if (convention.HasFlag(AutoIdentityDAC.PrimaryKeyConvention.TableNameId) && clauseHash.ContainsKey("Id".FormatWith(tableName)))
{
primaryKeyColumnValue = clauseHash["ID"];
}
if (primaryKeyColumnValue == null)
{
return(false); // Id not specified in whereClause (do nothing)
}
if (convention.HasFlag(AutoIdentityDAC.PrimaryKeyConvention.FirstInWhereClause) && clause.ElementAt(0) != primaryKeyColumnValue)
{
return(false); // Id was specified but not first in where clause (do nothing)
}
if (!convention.HasFlag(AutoIdentityDAC.PrimaryKeyConvention.Numeric) && primaryKeyColumnValue.Value.GetType().IsNumeric())
{
return(false);
}
if (!convention.HasFlag(AutoIdentityDAC.PrimaryKeyConvention.Guid) && primaryKeyColumnValue.Value is Guid)
{
return(false);
}
if (!convention.HasFlag(AutoIdentityDAC.PrimaryKeyConvention.String) && primaryKeyColumnValue.Value is string)
{
return(false);
}
return(true);
}
