private static TableHiLoGenerator CreateTableHiLoGenerator(TableIdGeneratorParams parameters)
{
var generator = new TableHiLoGenerator();
Configure(parameters, generator);
return(generator);
}
private static Int32MinimalGapTableIdGenerator CreateMinimalGapTableIdGenerator(
TableIdGeneratorParams parameters)
{
var generator = new Int32MinimalGapTableIdGenerator();
Configure(parameters, generator);
return(generator);
}
private static void Configure(TableIdGeneratorParams parameters, IConfigurable generator)
{
var parms = new Dictionary <string, string>
{
{ TableGenerator.TableParamName, parameters.TableName },
{ TableGenerator.ColumnParamName, parameters.ColumnName },
{ TableHiLoGenerator.MaxLo, parameters.InMemoryIncrementSize.ToString() }
};
generator.Configure(parameters.ColumnType, parms, parameters.Dialect);
}
protected static void AddTableAndColumnName <T>(Expression <Func <T, object> > propertyAccessor,
string columnNameSuffix,
TableIdGeneratorParams result)
{
string columnName = "Next_" + ReflectionUtil.GetAccessor(propertyAccessor).Name;
if (!String.IsNullOrEmpty(columnNameSuffix))
{
columnName += columnNameSuffix;
}
string tableName = "tbl" + typeof(T).Name + "_NextNumber";
result.ColumnName = columnName;
result.TableName = tableName;
}
/// <summary>
/// Derive the parameters for a table backed id generator from the <paramref name="propertyAccessor"/>
/// supplied
/// </summary>
/// <remarks>
/// <example>
/// <code>
/// var paramseter = TableIdGeneratorParams.For<Customer>(x => x.Reference, IdGeneratorStrategy.MinimalGap);
/// </code>
/// would create the parameters for a table backed <see cref="IIdGenerator{T}"/> whose id's would be stored in a table
/// column 'tblCustomer_NextNumber.Next_Reference'
/// </example>
/// </remarks>
/// <typeparam name="T">The entity type that is the subject of the id's that are to be generated</typeparam>
/// <param name="propertyAccessor">An expression that identifies the property on the subject which is to have id's generated</param>
/// <param name="columnNameSuffix">An optional suffix for the final column name</param>
/// <param name="strategy">The id generating strategy</param>
/// <returns></returns>
public static TableIdGeneratorParams For <T>(Expression <Func <T, object> > propertyAccessor,
string columnNameSuffix,
IdGeneratorStrategy strategy)
{
var tableStrategies = new[]
{
IdGeneratorStrategy.MinimalGap,
IdGeneratorStrategy.TableHiLow
};
Check.Require(() => Demand.The.Param(() => strategy).IsOneOf(tableStrategies));
var result = new TableIdGeneratorParams();
AddTableAndColumnName(propertyAccessor, columnNameSuffix, result);
return(result);
}
