private static void SplitQueryFilter(Filter filter, Table targetTable, string indexName, out Dictionary<string, Condition> keyConditions, out Dictionary<string, Condition> filterConditions)
{
QueryFilter queryFilter = filter as QueryFilter;
if (queryFilter == null) throw new InvalidOperationException("Filter is not of type QueryFilter");
keyConditions = new Dictionary<string, Condition>();
filterConditions = new Dictionary<string, Condition>();
var conditions = filter.ToConditions(targetTable.Conversion);
foreach (var kvp in conditions)
{
string attributeName = kvp.Key;
Condition condition = kvp.Value;
// depending on whether the attribute is key, place either in keyConditions or filterConditions
if (IsKeyAttribute(targetTable, indexName, attributeName))
keyConditions[attributeName] = condition;
else
filterConditions[attributeName] = condition;
}
}
/// <summary>
/// Creates a Filter from a conditions map
/// </summary>
/// <param name="conditions">Map from attribute name to condition</param>
/// <returns>Equivalent Filter</returns>
public static Filter FromConditions(Dictionary<string, Condition> conditions)
{
Filter ret = new Filter();
ret.Conditions = conditions;
return ret;
}
/// <summary>
/// Creates a Filter from a conditions map
/// </summary>
/// <param name="conditions">Map from attribute name to condition</param>
/// <returns>Equivalent Filter</returns>
public static Filter FromConditions(Dictionary<string, Condition> conditions)
{
Filter ret = new Filter();
foreach(var kvp in conditions)
{
string name = kvp.Key;
Condition condition = kvp.Value;
ret.Conditions.Add(name, new FilterCondition(condition));
}
return ret;
}
