org.apache.cassandra.db.columniterator

Class AbstractSSTableIterator

java.lang.Object

org.apache.cassandra.db.columniterator.AbstractSSTableIterator

All Implemented Interfaces:

java.lang.AutoCloseable, java.util.Iterator<Unfiltered>, BaseRowIterator<Unfiltered>, UnfilteredRowIterator, CloseableIterator<Unfiltered>

Direct Known Subclasses:

SSTableIterator, SSTableReversedIterator

public abstract class AbstractSSTableIterator
extends java.lang.Object
implements UnfilteredRowIterator

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AbstractSSTableIterator.IndexState
protected class	AbstractSSTableIterator.Reader

Field Summary

Fields

Modifier and Type	Field and Description
protected ColumnFilter	columns
protected DeserializationHelper	helper
protected FileHandle	ifile
protected DecoratedKey	key
protected TableMetadata	metadata
protected DeletionTime	partitionLevelDeletion
protected AbstractSSTableIterator.Reader	reader
protected Slices	slices
protected SSTableReader	sstable
protected Row	staticRow

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractSSTableIterator(SSTableReader sstable, FileDataInput file, DecoratedKey key, RowIndexEntry indexEntry, Slices slices, ColumnFilter columnFilter, FileHandle ifile)

Method Summary

Modifier and Type	Method and Description
void	close()
RegularAndStaticColumns	columns() A subset of the columns for the (static and regular) rows returned by this iterator.
protected abstract AbstractSSTableIterator.Reader	createReaderInternal(RowIndexEntry indexEntry, FileDataInput file, boolean shouldCloseFile)
protected abstract boolean	hasMoreSlices() Checks if there are more slice to process.
boolean	hasNext()
TableMetadata	metadata() The metadata for the table this iterator on.
Unfiltered	next()
protected abstract int	nextSliceIndex() Returns the index of the next slice to process.
DecoratedKey	partitionKey() The partition key of the partition this in an iterator over.
DeletionTime	partitionLevelDeletion() The partition level deletion for the partition this iterate over.
void	remove()
Row	staticRow() The static part corresponding to this partition (this can be an empty row but cannot be null).
EncodingStats	stats() Return "statistics" about what is returned by this iterator.

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 org.apache.cassandra.db.rows.BaseRowIterator

isReverseOrder

Methods inherited from interface java.util.Iterator

forEachRemaining

Field Detail

sstable

protected final SSTableReader sstable

metadata

protected final TableMetadata metadata

key

protected final DecoratedKey key

partitionLevelDeletion

protected final DeletionTime partitionLevelDeletion

columns

protected final ColumnFilter columns

helper

protected final DeserializationHelper helper

staticRow

protected final Row staticRow

reader

protected final AbstractSSTableIterator.Reader reader

ifile

protected final FileHandle ifile

slices

protected final Slices slices

Constructor Detail

AbstractSSTableIterator

protected AbstractSSTableIterator(SSTableReader sstable,
                                  FileDataInput file,
                                  DecoratedKey key,
                                  RowIndexEntry indexEntry,
                                  Slices slices,
                                  ColumnFilter columnFilter,
                                  FileHandle ifile)

Method Detail

nextSliceIndex

protected abstract int nextSliceIndex()

Returns the index of the next slice to process.

Returns:

the index of the next slice to process

hasMoreSlices

protected abstract boolean hasMoreSlices()

Checks if there are more slice to process.

Returns:

true if there are more slice to process, false otherwise.

createReaderInternal

protected abstract AbstractSSTableIterator.Reader createReaderInternal(RowIndexEntry indexEntry,
                                                                       FileDataInput file,
                                                                       boolean shouldCloseFile)

metadata

public TableMetadata metadata()

Description copied from interface: BaseRowIterator

The metadata for the table this iterator on.

Specified by:

metadata in interface BaseRowIterator<Unfiltered>

columns

public RegularAndStaticColumns columns()

Description copied from interface: BaseRowIterator

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.

Specified by:

columns in interface BaseRowIterator<Unfiltered>

partitionKey

public DecoratedKey partitionKey()

Description copied from interface: BaseRowIterator

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

Specified by:

partitionKey in interface BaseRowIterator<Unfiltered>

partitionLevelDeletion

public DeletionTime partitionLevelDeletion()

Description copied from interface: UnfilteredRowIterator

The partition level deletion for the partition this iterate over.

Specified by:

partitionLevelDeletion in interface UnfilteredRowIterator

staticRow

public Row staticRow()

Description copied from interface: BaseRowIterator

The static part corresponding to this partition (this can be an empty row but cannot be null).

Specified by:

staticRow in interface BaseRowIterator<Unfiltered>

stats

public EncodingStats stats()

Description copied from interface: UnfilteredRowIterator

Return "statistics" about what is returned by this iterator. Those are used for performance reasons (for delta-encoding for instance) and code should not expect those to be exact.

Specified by:

stats in interface UnfilteredRowIterator

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<Unfiltered>

next

public Unfiltered next()

Specified by:

next in interface java.util.Iterator<Unfiltered>

remove

public void remove()

Specified by:

remove in interface java.util.Iterator<Unfiltered>

close

public void close()

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface CloseableIterator<Unfiltered>