org.apache.cassandra.db.rows

Interface RowIterator

All Superinterfaces:

java.lang.AutoCloseable, java.util.Iterator<Row>

All Known Implementing Classes:

CountingRowIterator, WrappingRowIterator

public interface RowIterator
extends java.util.Iterator<Row>, java.lang.AutoCloseable

An iterator over rows belonging to a partition. A RowIterator is an UnfilteredRowIterator to which any deletion information has been filtered out. As such, all cell of all rows returned by this iterator are, by definition, live, and hence code using a RowIterator don't have to worry about tombstones and other deletion information. Note that as for UnfilteredRowIterator, the rows returned must be in clustering order (or reverse clustering order if isReverseOrder is true), and the Row objects returned by next() are only valid until the next call to hasNext() or next().

Method Summary

Modifier and Type	Method and Description
void	close()
PartitionColumns	columns() A subset of the columns for the (static and regular) rows returned by this iterator.
default boolean	isEmpty() Returns whether the provided iterator has no data.
boolean	isReverseOrder() Whether or not the rows returned by this iterator are in reversed clustering order.
CFMetaData	metadata() The metadata for the table this iterator on.
DecoratedKey	partitionKey() The partition key of the partition this in an iterator over.
Row	staticRow() The static part corresponding to this partition (this can be an empty row).

Methods inherited from interface java.util.Iterator

forEachRemaining, hasNext, next, remove

Method Detail

metadata

CFMetaData metadata()

The metadata for the table this iterator on.

isReverseOrder

boolean isReverseOrder()

Whether or not the rows returned by this iterator are in reversed clustering order.

columns

PartitionColumns columns()

A subset of the columns for the (static and regular) rows returned by this iterator. Every row returned by this iterator must guarantee that it has only those columns.

partitionKey

DecoratedKey partitionKey()

The partition key of the partition this in an iterator over.

staticRow

Row staticRow()

The static part corresponding to this partition (this can be an empty row).

close

void close()

Specified by:

close in interface java.lang.AutoCloseable

isEmpty

default boolean isEmpty()

Returns whether the provided iterator has no data.