org.apache.cassandra.db

Class Column

java.lang.Object

org.apache.cassandra.db.Column

All Implemented Interfaces:

OnDiskAtom

Direct Known Subclasses:

CounterColumn, CounterUpdateColumn, DeletedColumn, ExpiringColumn

public class Column
extends java.lang.Object
implements OnDiskAtom

Column is immutable, which prevents all kinds of confusion in a multithreaded environment.

Nested Class Summary

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

OnDiskAtom.Serializer

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_NAME_LENGTH
protected java.nio.ByteBuffer	name
static ColumnSerializer	serializer
protected long	timestamp
protected java.nio.ByteBuffer	value

Constructor Summary

Constructors

Constructor and Description
Column(java.nio.ByteBuffer name, java.nio.ByteBuffer value)
Column(java.nio.ByteBuffer name, java.nio.ByteBuffer value, long timestamp)

Method Summary

Methods

Modifier and Type	Method and Description
static Column	create(boolean value, long timestamp, java.lang.String... names)
static Column	create(java.nio.ByteBuffer name, java.nio.ByteBuffer value, long timestamp, int ttl, CFMetaData metadata)
static Column	create(java.nio.ByteBuffer value, long timestamp, java.lang.String... names)
static Column	create(double value, long timestamp, java.lang.String... names)
static Column	create(java.net.InetAddress value, long timestamp, java.lang.String... names)
static Column	create(int value, long timestamp, java.lang.String... names)
static Column	create(java.lang.String value, long timestamp, java.lang.String... names)
int	dataSize()
Column	diff(Column column)
boolean	equals(java.lang.Object o)
int	getLocalDeletionTime()
long	getMarkedForDeleteAt()
java.lang.String	getString(AbstractType<?> comparator)
int	hashCode()
boolean	hasIrrelevantData(int gcBefore)
boolean	isLive(long now)
boolean	isMarkedForDelete(long now)
Column	localCopy(ColumnFamilyStore cfs)
Column	localCopy(ColumnFamilyStore cfs, Allocator allocator)
long	maxTimestamp()
long	minTimestamp() For a standard column, this is the same as timestamp().
java.nio.ByteBuffer	name()
static java.util.Iterator<OnDiskAtom>	onDiskIterator(java.io.DataInput in, int count, ColumnSerializer.Flag flag, int expireBefore, Descriptor.Version version) For 2.0-formatted sstables (where column count is not stored), @param count should be Integer.MAX_VALUE, and we will look for the end-of-row column name marker instead of relying on that.
static OnDiskAtom.Serializer	onDiskSerializer()
Column	reconcile(Column column)
Column	reconcile(Column column, Allocator allocator)
int	serializationFlags()
int	serializedSize(TypeSizes typeSizes)
long	serializedSizeForSSTable()
long	timestamp()
void	updateDigest(java.security.MessageDigest digest)
void	validateFields(CFMetaData metadata)
protected void	validateName(CFMetaData metadata)
java.nio.ByteBuffer	value()
Column	withUpdatedName(java.nio.ByteBuffer newName)
Column	withUpdatedTimestamp(long newTimestamp)

Methods inherited from class java.lang.Object

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

Field Detail

MAX_NAME_LENGTH

public static final int MAX_NAME_LENGTH

See Also:

Constant Field Values

serializer

public static final ColumnSerializer serializer

name

protected final java.nio.ByteBuffer name

value

protected final java.nio.ByteBuffer value

timestamp

protected final long timestamp

Constructor Detail

Column

public Column(java.nio.ByteBuffer name,
      java.nio.ByteBuffer value)

Column

public Column(java.nio.ByteBuffer name,
      java.nio.ByteBuffer value,
      long timestamp)

Method Detail

onDiskSerializer

public static OnDiskAtom.Serializer onDiskSerializer()

onDiskIterator

public static java.util.Iterator<OnDiskAtom> onDiskIterator(java.io.DataInput in,
                                            int count,
                                            ColumnSerializer.Flag flag,
                                            int expireBefore,
                                            Descriptor.Version version)

For 2.0-formatted sstables (where column count is not stored), @param count should be Integer.MAX_VALUE, and we will look for the end-of-row column name marker instead of relying on that.

withUpdatedName

public Column withUpdatedName(java.nio.ByteBuffer newName)

withUpdatedTimestamp

public Column withUpdatedTimestamp(long newTimestamp)

name

public java.nio.ByteBuffer name()

Specified by:

name in interface OnDiskAtom

value

public java.nio.ByteBuffer value()

timestamp

public long timestamp()

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()

Specified by:

maxTimestamp in interface OnDiskAtom

isMarkedForDelete

public boolean isMarkedForDelete(long now)

isLive

public boolean isLive(long now)

getMarkedForDeleteAt

public long getMarkedForDeleteAt()

dataSize

public int dataSize()

serializedSize

public int serializedSize(TypeSizes typeSizes)

Specified by:

serializedSize in interface OnDiskAtom

serializedSizeForSSTable

public long serializedSizeForSSTable()

Specified by:

serializedSizeForSSTable in interface OnDiskAtom

serializationFlags

public int serializationFlags()

diff

public Column diff(Column column)

updateDigest

public void updateDigest(java.security.MessageDigest digest)

Specified by:

updateDigest in interface OnDiskAtom

getLocalDeletionTime

public int getLocalDeletionTime()

Specified by:

getLocalDeletionTime in interface OnDiskAtom

reconcile

public Column reconcile(Column column)

reconcile

public Column reconcile(Column column,
               Allocator allocator)

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

localCopy

public Column localCopy(ColumnFamilyStore cfs)

localCopy

public Column localCopy(ColumnFamilyStore cfs,
               Allocator allocator)

getString

public java.lang.String getString(AbstractType<?> comparator)

validateName

protected void validateName(CFMetaData metadata)
                     throws MarshalException

Throws:

MarshalException

validateFields

public void validateFields(CFMetaData metadata)
                    throws MarshalException

Specified by:

validateFields in interface OnDiskAtom

Throws:

MarshalException

hasIrrelevantData

public boolean hasIrrelevantData(int gcBefore)

create

public static Column create(java.nio.ByteBuffer name,
            java.nio.ByteBuffer value,
            long timestamp,
            int ttl,
            CFMetaData metadata)

create

public static Column create(java.lang.String value,
            long timestamp,
            java.lang.String... names)

create

public static Column create(int value,
            long timestamp,
            java.lang.String... names)

create

public static Column create(boolean value,
            long timestamp,
            java.lang.String... names)

create

public static Column create(double value,
            long timestamp,
            java.lang.String... names)

create

public static Column create(java.nio.ByteBuffer value,
            long timestamp,
            java.lang.String... names)

create

public static Column create(java.net.InetAddress value,
            long timestamp,
            java.lang.String... names)