/// <summary>
///
/// </summary>
/// <param name="name"></param>
/// <param name="value"></param>
/// <returns></returns>
public override bool TrySetColumn(object name, object value)
{
var col = Columns.FirstOrDefault(c => c.ColumnName == name);
var mutationType = MutationType.Changed;
// if column doesn't exisit create it and add it to the columns
if (col == null)
{
mutationType = MutationType.Added;
col = new FluentColumn <CompareWith>();
((FluentColumn <CompareWith>)col).ColumnName = CassandraType.GetType <CompareWith>(name);
_columns.SupressChangeNotification = true;
_columns.Add(col);
_columns.SupressChangeNotification = false;
}
// set the column value
col.ColumnValue = CassandraType.GetType <BytesType>(value);
// notify the tracker that the column has changed
OnColumnMutated(mutationType, col);
return(true);
}
private static Cassandra.IndexExpression VisitRelationalExpression(BinaryExpression exp)
{
Cassandra.IndexExpression indexExpression;
var columnName = GetColumnName(exp.Left);
var value = CassandraType.GetType <BytesType>(Expression.Lambda(exp.Right).Compile().DynamicInvoke());
indexExpression = new Cassandra.IndexExpression {
Column_name = columnName,
Value = value
};
switch (exp.NodeType)
{
case ExpressionType.Equal: indexExpression.Op = Cassandra.IndexOperator.EQ; break;
case ExpressionType.GreaterThan: indexExpression.Op = Cassandra.IndexOperator.GT; break;
case ExpressionType.GreaterThanOrEqual: indexExpression.Op = Cassandra.IndexOperator.GTE; break;
case ExpressionType.LessThan: indexExpression.Op = Cassandra.IndexOperator.LT; break;
case ExpressionType.LessThanOrEqual: indexExpression.Op = Cassandra.IndexOperator.LTE; break;
default:
throw new NotSupportedException(exp.NodeType.ToString() + " is not a supported relational criteria.");
}
return(indexExpression);
}
/// <summary>
///
/// </summary>
/// <param name="name"></param>
/// <param name="result"></param>
/// <returns></returns>
public override bool TryGetColumn(object name, out object result)
{
var col = Columns.FirstOrDefault(c => c.ColumnName == name);
result = (col == null) ? CreateSuperColumn(CassandraType.GetType <CompareWith>(name)) : col;
return(true);
}
public static FluentColumn <CompareWith> ConvertColumnToFluentColumn <CompareWith>(Column col)
where CompareWith : CassandraType
{
return(new FluentColumn <CompareWith> {
ColumnName = CassandraType.GetType <CompareWith>(col.Name),
ColumnValue = col.Value,
ColumnTimestamp = new DateTimeOffset(col.Timestamp, TimeSpan.Zero),
ColumnTimeToLive = col.Ttl
});
}
public static FluentSuperColumn <CompareWith, CompareSubcolumnWith> ConvertSuperColumnToFluentSuperColumn <CompareWith, CompareSubcolumnWith>(SuperColumn col)
where CompareWith : CassandraType
where CompareSubcolumnWith : CassandraType
{
var superCol = new FluentSuperColumn <CompareWith, CompareSubcolumnWith> {
ColumnName = CassandraType.GetType <CompareWith>(col.Name)
};
foreach (var xcol in col.Columns)
{
superCol.Columns.Add(ConvertColumnToFluentColumn <CompareSubcolumnWith>(xcol));
}
return(superCol);
}
/// <summary>
///
/// </summary>
/// <param name="binder"></param>
/// <param name="value"></param>
/// <returns></returns>
public override bool TrySetColumn(object name, object value)
{
if (!(value is FluentSuperColumn <CompareWith, CompareSubcolumnWith>))
{
throw new ArgumentException("Value must be of type " + typeof(FluentSuperColumn <CompareWith, CompareSubcolumnWith>) + ", because this column family is of type Super.", "value");
}
var col = Columns.FirstOrDefault(c => c.ColumnName == name);
var mutationType = col == null ? MutationType.Added : MutationType.Changed;
col = (FluentSuperColumn <CompareWith, CompareSubcolumnWith>)value;
((FluentSuperColumn <CompareWith, CompareSubcolumnWith>)col).ColumnName = CassandraType.GetType <CompareWith>(name);
int index = Columns.IndexOf(col);
_columns.SupressChangeNotification = true;
if (index < 0)
{
Columns.Add(col);
}
else
{
Columns.Insert(index, col);
}
_columns.SupressChangeNotification = false;
// notify the tracker that the column has changed
OnColumnMutated(mutationType, col);
return(true);
}