org.apache.cassandra.db.filter

Class NamesQueryFilter

java.lang.Object

org.apache.cassandra.db.filter.NamesQueryFilter

All Implemented Interfaces:

IDiskAtomFilter

public class NamesQueryFilter
extends java.lang.Object
implements IDiskAtomFilter

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	NamesQueryFilter.Serializer

Field Summary

Fields

Modifier and Type	Field and Description
java.util.SortedSet<java.nio.ByteBuffer>	columns
static NamesQueryFilter.Serializer	serializer

Constructor Summary

Constructors

Constructor and Description
NamesQueryFilter(java.nio.ByteBuffer column)
NamesQueryFilter(java.util.SortedSet<java.nio.ByteBuffer> columns)
NamesQueryFilter(java.util.SortedSet<java.nio.ByteBuffer> columns, boolean countCQL3Rows)

Method Summary

Methods

Modifier and Type	Method and Description
void	collectReducedColumns(IColumnContainer container, java.util.Iterator<IColumn> reducedColumns, int gcBefore) collects columns from reducedColumns into returnCF.
SuperColumn	filterSuperColumn(SuperColumn superColumn, int gcBefore) subcolumns of a supercolumn are unindexed, so to pick out parts of those we operate in-memory.
java.util.Comparator<IColumn>	getColumnComparator(AbstractType<?> comparator)
int	getLiveCount(ColumnFamily cf)
OnDiskAtomIterator	getMemtableColumnIterator(ColumnFamily cf, DecoratedKey key) returns an iterator that returns columns from the given memtable matching the Filter criteria in sorted order.
ISSTableColumnIterator	getSSTableColumnIterator(SSTableReader sstable, DecoratedKey key) returns an iterator that returns columns from the given SSTable matching the Filter criteria in sorted order.
ISSTableColumnIterator	getSSTableColumnIterator(SSTableReader sstable, FileDataInput file, DecoratedKey key, RowIndexEntry indexEntry) Get an iterator that returns columns from the given SSTable using the opened file matching the Filter criteria in sorted order.
boolean	isReversed()
java.lang.String	toString()
void	updateColumnsLimit(int newLimit)
NamesQueryFilter	withUpdatedColumns(java.util.SortedSet<java.nio.ByteBuffer> newColumns)

Methods inherited from class java.lang.Object

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

Field Detail

serializer

public static final NamesQueryFilter.Serializer serializer

columns

public final java.util.SortedSet<java.nio.ByteBuffer> columns

Constructor Detail

NamesQueryFilter

public NamesQueryFilter(java.util.SortedSet<java.nio.ByteBuffer> columns)

NamesQueryFilter

public NamesQueryFilter(java.util.SortedSet<java.nio.ByteBuffer> columns,
                boolean countCQL3Rows)

NamesQueryFilter

public NamesQueryFilter(java.nio.ByteBuffer column)

Method Detail

withUpdatedColumns

public NamesQueryFilter withUpdatedColumns(java.util.SortedSet<java.nio.ByteBuffer> newColumns)

getMemtableColumnIterator

public OnDiskAtomIterator getMemtableColumnIterator(ColumnFamily cf,
                                           DecoratedKey key)

Description copied from interface: IDiskAtomFilter

returns an iterator that returns columns from the given memtable matching the Filter criteria in sorted order.

Specified by:

getMemtableColumnIterator in interface IDiskAtomFilter

getSSTableColumnIterator

public ISSTableColumnIterator getSSTableColumnIterator(SSTableReader sstable,
                                              DecoratedKey key)

Description copied from interface: IDiskAtomFilter

returns an iterator that returns columns from the given SSTable matching the Filter criteria in sorted order.

Specified by:

getSSTableColumnIterator in interface IDiskAtomFilter

getSSTableColumnIterator

public ISSTableColumnIterator getSSTableColumnIterator(SSTableReader sstable,
                                              FileDataInput file,
                                              DecoratedKey key,
                                              RowIndexEntry indexEntry)

Description copied from interface: IDiskAtomFilter

Get an iterator that returns columns from the given SSTable using the opened file matching the Filter criteria in sorted order.

Specified by:

getSSTableColumnIterator in interface IDiskAtomFilter

file - Already opened file data input, saves us opening another one

key - The key of the row we are about to iterate over

filterSuperColumn

public SuperColumn filterSuperColumn(SuperColumn superColumn,
                            int gcBefore)

Description copied from interface: IDiskAtomFilter

subcolumns of a supercolumn are unindexed, so to pick out parts of those we operate in-memory.

Specified by:

filterSuperColumn in interface IDiskAtomFilter

Parameters:

superColumn - may be modified by filtering op.

collectReducedColumns

public void collectReducedColumns(IColumnContainer container,
                         java.util.Iterator<IColumn> reducedColumns,
                         int gcBefore)

Description copied from interface: IDiskAtomFilter

collects columns from reducedColumns into returnCF. Termination is determined by the filter code, which should have some limit on the number of columns to avoid running out of memory on large rows.

Specified by:

collectReducedColumns in interface IDiskAtomFilter

getColumnComparator

public java.util.Comparator<IColumn> getColumnComparator(AbstractType<?> comparator)

Specified by:

getColumnComparator in interface IDiskAtomFilter

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

isReversed

public boolean isReversed()

Specified by:

isReversed in interface IDiskAtomFilter

updateColumnsLimit

public void updateColumnsLimit(int newLimit)

Specified by:

updateColumnsLimit in interface IDiskAtomFilter

getLiveCount

public int getLiveCount(ColumnFamily cf)

Specified by:

getLiveCount in interface IDiskAtomFilter