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using System;
using System.Collections.Generic;
using System.Linq;
using FluentCassandra.Types;
namespace FluentCassandra.Operations
{
public class GetColumnFamilyIndexedSlices : QueryableColumnFamilyOperation<FluentColumnFamily>
{
/*
* list<KeySlice> get_range_slices(keyspace, column_parent, predicate, range, consistency_level)
*/
public CassandraIndexClause IndexClause { get; private set; }
public override IEnumerable<FluentColumnFamily> Execute()
{
return GetFamilies(ColumnFamily);
}
private IEnumerable<FluentColumnFamily> GetFamilies(BaseCassandraColumnFamily columnFamily)
{
var schema = ColumnFamily.GetSchema();
var parent = new CassandraColumnParent {
ColumnFamily = columnFamily.FamilyName
};
SlicePredicate = Helper.SetSchemaForSlicePredicate(SlicePredicate, schema);
var output = Session.GetClient().get_indexed_slices(
parent,
IndexClause,
SlicePredicate,
Session.ReadConsistency
);
foreach (var result in output)
{
var key = CassandraObject.GetCassandraObjectFromDatabaseByteArray(result.Key, schema.KeyValueType);
var r = new FluentColumnFamily(key, columnFamily.FamilyName, columnFamily.GetSchema(), result.Columns.Select(col => {
return Helper.ConvertColumnToFluentColumn(col.Column, schema);
}));
columnFamily.Context.Attach(r);
r.MutationTracker.Clear();
yield return r;
}
}
public GetColumnFamilyIndexedSlices(CassandraIndexClause indexClause, CassandraSlicePredicate columnSlicePredicate)
{
IndexClause = indexClause;
SlicePredicate = columnSlicePredicate;
}
}
}
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