org.apache.cassandra.db
Class SuperColumn

java.lang.Object
  org.apache.cassandra.db.AbstractColumnContainer
      org.apache.cassandra.db.SuperColumn

All Implemented Interfaces:

java.lang.Iterable<IColumn>, IColumn, IColumnContainer, IIterableColumns

public class SuperColumn
extends AbstractColumnContainer
implements IColumn

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.db.AbstractColumnContainer

AbstractColumnContainer.DeletionInfo

Field Summary

Fields inherited from class org.apache.cassandra.db.AbstractColumnContainer

columns, deletionInfo

Fields inherited from interface org.apache.cassandra.db.IColumn

MAX_NAME_LENGTH

Constructor Summary

SuperColumn(java.nio.ByteBuffer name, AbstractType comparator)

Method Summary

void	addColumn(IColumn column, Allocator allocator)
IColumn	cloneMe()
SuperColumn	cloneMeShallow()
IColumn	diff(IColumn columnNew)
java.lang.String	getString(AbstractType comparator)
IColumn	getSubColumn(java.nio.ByteBuffer columnName)
java.util.Collection<IColumn>	getSubColumns()
boolean	isLive() For a simple column, live == !isMarkedForDelete.
IColumn	localCopy(ColumnFamilyStore cfs) clones the column for the row cache, interning column names and making copies of other underlying byte buffers
IColumn	localCopy(ColumnFamilyStore cfs, Allocator allocator) clones the column for the memtable, interning column names and making copies of other underlying byte buffers.
long	maxTimestamp() For a standard column, this is the same as timestamp().
long	mostRecentLiveChangeAt()
java.nio.ByteBuffer	name()
IColumn	reconcile(IColumn c)
IColumn	reconcile(IColumn c, Allocator allocator)
int	serializationFlags()
int	serializedSize() This returns the size of the super-column when serialized.
static org.apache.cassandra.db.SuperColumnSerializer	serializer(AbstractType comparator)
int	size() This calculates the exact size of the sub columns on the fly
long	timestamp()
void	updateDigest(java.security.MessageDigest digest)
void	validateFields(CFMetaData metadata)
java.nio.ByteBuffer	value()

Methods inherited from class org.apache.cassandra.db.AbstractColumnContainer

addAll, addColumn, delete, delete, getColumn, getColumnCount, getColumnNames, getComparator, getEstimatedColumnCount, getLiveColumnCount, getLocalDeletionTime, getMarkedForDeleteAt, getReverseSortedColumns, getSortedColumns, hasExpiredTombstones, isEmpty, isMarkedForDelete, iterator, maybeResetDeletionTimes, remove, replace, retainAll

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.IColumn

addColumn, getLocalDeletionTime, getMarkedForDeleteAt, hasExpiredTombstones, isMarkedForDelete

Constructor Detail

SuperColumn

public SuperColumn(java.nio.ByteBuffer name,
                   AbstractType comparator)

Method Detail

serializer

public static org.apache.cassandra.db.SuperColumnSerializer serializer(AbstractType comparator)

cloneMeShallow

public SuperColumn cloneMeShallow()

cloneMe

public IColumn cloneMe()

name

public java.nio.ByteBuffer name()

Specified by:

name in interface IColumn

getSubColumns

public java.util.Collection<IColumn> getSubColumns()

Specified by:

getSubColumns in interface IColumn

getSubColumn

public IColumn getSubColumn(java.nio.ByteBuffer columnName)

Specified by:

getSubColumn in interface IColumn

size

public int size()

This calculates the exact size of the sub columns on the fly

Specified by:

size in interface IColumn

serializedSize

public int serializedSize()

This returns the size of the super-column when serialized.

Specified by:

serializedSize in interface IColumn

See Also:

IColumn.serializedSize()

timestamp

public long timestamp()

Specified by:

timestamp in interface IColumn

maxTimestamp

public long maxTimestamp()

Description copied from interface: IColumn

For a standard column, this is the same as timestamp(). For a super column, this is the max column timestamp of the sub columns.

Specified by:

maxTimestamp in interface IColumn

mostRecentLiveChangeAt

public long mostRecentLiveChangeAt()

Specified by:

mostRecentLiveChangeAt in interface IColumn

value

public java.nio.ByteBuffer value()

Specified by:

value in interface IColumn

addColumn

public void addColumn(IColumn column,
                      Allocator allocator)

Specified by:

addColumn in interface IColumn

Specified by:

addColumn in interface IColumnContainer

Overrides:

addColumn in class AbstractColumnContainer

diff

public IColumn diff(IColumn columnNew)

Specified by:

diff in interface IColumn

updateDigest

public void updateDigest(java.security.MessageDigest digest)

Specified by:

updateDigest in interface IColumn

getString

public java.lang.String getString(AbstractType comparator)

Specified by:

getString in interface IColumn

isLive

public boolean isLive()

Description copied from interface: IColumn

For a simple column, live == !isMarkedForDelete. For a supercolumn, live means it has at least one subcolumn whose timestamp is greater than the supercolumn deleted-at time.

Specified by:

isLive in interface IColumn

localCopy

public IColumn localCopy(ColumnFamilyStore cfs)

Description copied from interface: IColumn

clones the column for the row cache, interning column names and making copies of other underlying byte buffers

Specified by:

localCopy in interface IColumn

localCopy

public IColumn localCopy(ColumnFamilyStore cfs,
                         Allocator allocator)

Description copied from interface: IColumn

clones the column for the memtable, interning column names and making copies of other underlying byte buffers. Unlike the other localCopy, this uses Allocator to allocate values in contiguous memory regions, which helps avoid heap fragmentation.

Specified by:

localCopy in interface IColumn

reconcile

public IColumn reconcile(IColumn c)

Specified by:

reconcile in interface IColumn

reconcile

public IColumn reconcile(IColumn c,
                         Allocator allocator)

Specified by:

reconcile in interface IColumn

serializationFlags

public int serializationFlags()

Specified by:

serializationFlags in interface IColumn

validateFields

public void validateFields(CFMetaData metadata)
                    throws MarshalException

Specified by:

validateFields in interface IColumn

Throws:

MarshalException