org.apache.cassandra.db.rows

Class WithOnlyQueriedData<I extends BaseRowIterator<?>>

java.lang.Object

org.apache.cassandra.db.transform.Transformation<I>

org.apache.cassandra.db.rows.WithOnlyQueriedData<I>

public class WithOnlyQueriedData<I extends BaseRowIterator<?>>
extends Transformation<I>

Function to skip cells (from an iterator) that are not part of those queried by the user according to the provided ColumnFilter. See UnfilteredRowIterators.withOnlyQueriedData(org.apache.cassandra.db.rows.UnfilteredRowIterator, org.apache.cassandra.db.filter.ColumnFilter) for more details.

Constructor Summary

Constructors

Constructor and Description
WithOnlyQueriedData(ColumnFilter filter)

Method Summary

Modifier and Type	Method and Description
protected RegularAndStaticColumns	applyToPartitionColumns(RegularAndStaticColumns columns) Applied to the PartitionColumns of any rows iterator.
protected Row	applyToRow(Row row) Applied to any row we encounter in a rows iterator
protected Row	applyToStatic(Row row) Applied to the static row of any rows iterator.

Methods inherited from class org.apache.cassandra.db.transform.Transformation

apply, apply, apply, apply, applyToDeletion, applyToMarker, applyToPartition, applyToPartitionKey, onClose, onPartitionClose

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

WithOnlyQueriedData

public WithOnlyQueriedData(ColumnFilter filter)

Method Detail

applyToPartitionColumns

protected RegularAndStaticColumns applyToPartitionColumns(RegularAndStaticColumns columns)

Description copied from class: Transformation

Applied to the PartitionColumns of any rows iterator. NOTE: same remark than for applyToDeletion: it is only applied to the first iterator in a sequence of iterators filled by MoreContents.

Overrides:

applyToPartitionColumns in class Transformation<I extends BaseRowIterator<?>>

applyToStatic

protected Row applyToStatic(Row row)

Description copied from class: Transformation

Applied to the static row of any rows iterator. NOTE that this is only applied to the first iterator in any sequence of iterators filled by a MoreContents; the static data for such iterators is all expected to be equal

Overrides:

applyToStatic in class Transformation<I extends BaseRowIterator<?>>

applyToRow

protected Row applyToRow(Row row)

Description copied from class: Transformation

Applied to any row we encounter in a rows iterator

Overrides:

applyToRow in class Transformation<I extends BaseRowIterator<?>>