org.apache.cassandra.db.rows

Class RowAndDeletionMergeIterator

java.lang.Object

org.apache.cassandra.utils.AbstractIterator<Unfiltered>

org.apache.cassandra.db.rows.AbstractUnfilteredRowIterator

org.apache.cassandra.db.rows.RowAndDeletionMergeIterator

All Implemented Interfaces:

com.google.common.collect.PeekingIterator<Unfiltered>, java.lang.AutoCloseable, java.util.Iterator<Unfiltered>, BaseRowIterator<Unfiltered>, UnfilteredRowIterator, CloseableIterator<Unfiltered>

public class RowAndDeletionMergeIterator
extends AbstractUnfilteredRowIterator

An iterator that merges a source of rows with the range tombstone and partition level deletion of a give partition.

This is used by our Partition implementations to produce a UnfilteredRowIterator by merging the rows and deletion infos that are kept separate. This has also 2 additional role: 1) this make sure the row returned only includes the columns selected for the resulting iterator. 2) this (optionally) remove any data that can be shadowed (see commet on 'removeShadowedData' below for more details)

Field Summary

Fields inherited from class org.apache.cassandra.db.rows.AbstractUnfilteredRowIterator

columns, isReverseOrder, metadata, partitionKey, partitionLevelDeletion, staticRow, stats

Constructor Summary

Constructors

Constructor and Description
RowAndDeletionMergeIterator(TableMetadata metadata, DecoratedKey partitionKey, DeletionTime partitionLevelDeletion, ColumnFilter selection, Row staticRow, boolean isReversed, EncodingStats stats, java.util.Iterator<Row> rows, java.util.Iterator<RangeTombstone> ranges, boolean removeShadowedData)

Method Summary

Modifier and Type	Method and Description
protected Unfiltered	computeNext()

Methods inherited from class org.apache.cassandra.db.rows.AbstractUnfilteredRowIterator

close, columns, isReverseOrder, metadata, partitionKey, partitionLevelDeletion, staticRow, stats

Methods inherited from class org.apache.cassandra.utils.AbstractIterator

endOfData, hasNext, next, peek, remove

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.db.rows.UnfilteredRowIterator

isEmpty

Methods inherited from interface java.util.Iterator

forEachRemaining, hasNext, next, remove

Constructor Detail

RowAndDeletionMergeIterator

public RowAndDeletionMergeIterator(TableMetadata metadata,
                                   DecoratedKey partitionKey,
                                   DeletionTime partitionLevelDeletion,
                                   ColumnFilter selection,
                                   Row staticRow,
                                   boolean isReversed,
                                   EncodingStats stats,
                                   java.util.Iterator<Row> rows,
                                   java.util.Iterator<RangeTombstone> ranges,
                                   boolean removeShadowedData)

Method Detail

computeNext

protected Unfiltered computeNext()

Specified by:

computeNext in class AbstractIterator<Unfiltered>