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, OnDiskAtom, IIterableColumns

public class SuperColumn
extends AbstractColumnContainer
implements IColumn

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.cassandra.db.OnDiskAtom

OnDiskAtom.Serializer

Field Summary

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

columns

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

MAX_NAME_LENGTH

Constructor Summary

Constructors

Constructor and Description
SuperColumn(java.nio.ByteBuffer name, AbstractType<?> comparator)

Method Summary

Methods

Modifier and Type	Method and Description
void	addColumn(IColumn column, Allocator allocator)
IColumn	cloneMe()
SuperColumn	cloneMeShallow()
int	dataSize() This calculates the exact size of the sub columns on the fly
IColumn	diff(IColumn columnNew)
boolean	equals(java.lang.Object o)
int	getLocalDeletionTime()
long	getMarkedForDeleteAt()
java.lang.String	getString(AbstractType<?> comparator)
IColumn	getSubColumn(java.nio.ByteBuffer columnName)
java.util.Collection<IColumn>	getSubColumns()
int	hashCode()
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	minTimestamp() For a standard column, this is the same as timestamp().
long	mostRecentLiveChangeAt()
long	mostRecentNonGCableChangeAt(int gcbefore)
java.nio.ByteBuffer	name()
static OnDiskAtom.Serializer	onDiskSerializer(AbstractType<?> comparator)
IColumn	reconcile(IColumn c)
IColumn	reconcile(IColumn c, Allocator allocator)
int	serializationFlags()
int	serializedSize(TypeSizes typeSizes) This returns the size of the super-column when serialized.
long	serializedSizeForSSTable()
static org.apache.cassandra.db.SuperColumnSerializer	serializer(AbstractType<?> comparator)
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, addAll, addAllWithSizeDelta, addColumn, delete, delete, delete, delete, deletionInfo, getColumn, getColumnCount, getColumnNames, getComparator, getEstimatedColumnCount, getReverseSortedColumns, getSortedColumns, hasIrrelevantData, hasOnlyTombstones, isEmpty, isMarkedForDelete, iterator, iterator, maybeResetDeletionTimes, remove, replace, retainAll, reverseIterator, setDeletionInfo

Methods inherited from class java.lang.Object

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

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

addColumn, hasIrrelevantData, 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)

onDiskSerializer

public static OnDiskAtom.Serializer onDiskSerializer(AbstractType<?> comparator)

cloneMeShallow

public SuperColumn cloneMeShallow()

cloneMe

public IColumn cloneMe()

name

public java.nio.ByteBuffer name()

Specified by:

name in interface OnDiskAtom

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

dataSize

public int dataSize()

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

Specified by:

dataSize in interface IColumn

serializedSize

public int serializedSize(TypeSizes typeSizes)

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

Specified by:

serializedSize in interface OnDiskAtom

See Also:

OnDiskAtom.serializedSize(TypeSizes)

serializedSizeForSSTable

public long serializedSizeForSSTable()

Specified by:

serializedSizeForSSTable in interface OnDiskAtom

timestamp

public long timestamp()

Specified by:

timestamp in interface IColumn

minTimestamp

public long minTimestamp()

Description copied from interface: OnDiskAtom

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

Specified by:

minTimestamp in interface OnDiskAtom

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

Specified by:

maxTimestamp in interface OnDiskAtom

mostRecentLiveChangeAt

public long mostRecentLiveChangeAt()

Specified by:

mostRecentLiveChangeAt in interface IColumn

getMarkedForDeleteAt

public long getMarkedForDeleteAt()

Specified by:

getMarkedForDeleteAt in interface IColumn

getLocalDeletionTime

public int getLocalDeletionTime()

Specified by:

getLocalDeletionTime in interface OnDiskAtom

mostRecentNonGCableChangeAt

public long mostRecentNonGCableChangeAt(int gcbefore)

Specified by:

mostRecentNonGCableChangeAt 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 OnDiskAtom

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

Specified by:

validateFields in interface OnDiskAtom

Throws:

MarshalException

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object