org.apache.cassandra.db.rows

Class ColumnData

java.lang.Object

org.apache.cassandra.db.rows.ColumnData

Direct Known Subclasses:

Cell, ComplexColumnData

public abstract class ColumnData
extends java.lang.Object

Generic interface for the data of a given column (inside a row). In practice, there is only 2 implementations of this: either Cell for simple columns or ComplexColumnData for complex columns.

Field Summary

Fields

Modifier and Type	Field and Description
protected ColumnMetadata	column
static java.util.Comparator<ColumnData>	comparator

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ColumnData(ColumnMetadata column)

Method Summary

Modifier and Type	Method and Description
ColumnMetadata	column() The column this is data for.
abstract int	dataSize() The size of the data hold by this ColumnData.
abstract void	digest(Digest digest) Adds the data to the provided digest.
static void	digest(Digest digest, ColumnData cd)
abstract boolean	hasInvalidDeletions() Validates the deletions (ttl and local deletion time) if any.
abstract ColumnData	markCounterLocalToBeCleared()
abstract long	maxTimestamp()
abstract ColumnData	purge(DeletionPurger purger, int nowInSec)
abstract long	unsharedHeapSizeExcludingData()
abstract ColumnData	updateAllTimestamp(long newTimestamp) Returns a copy of the data where all timestamps for live data have replaced by newTimestamp and all deletion timestamp by newTimestamp - 1.
abstract void	validate() Validate the column data.

Methods inherited from class java.lang.Object

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

Field Detail

comparator

public static final java.util.Comparator<ColumnData> comparator

column

protected final ColumnMetadata column

Constructor Detail

ColumnData

protected ColumnData(ColumnMetadata column)

Method Detail

column

public final ColumnMetadata column()

The column this is data for.

Returns:

the column this is a data for.

dataSize

public abstract int dataSize()

The size of the data hold by this ColumnData.

Returns:

the size used by the data of this ColumnData.

unsharedHeapSizeExcludingData

public abstract long unsharedHeapSizeExcludingData()

validate

public abstract void validate()

Validate the column data.

Throws:

MarshalException - if the data is not valid.

hasInvalidDeletions

public abstract boolean hasInvalidDeletions()

Validates the deletions (ttl and local deletion time) if any.

Returns:

true if it has any invalid deletions, false otherwise

digest

public abstract void digest(Digest digest)

Adds the data to the provided digest.

Parameters:

digest - the Digest to add the data to.

digest

public static void digest(Digest digest,
                          ColumnData cd)

updateAllTimestamp

public abstract ColumnData updateAllTimestamp(long newTimestamp)

Returns a copy of the data where all timestamps for live data have replaced by newTimestamp and all deletion timestamp by newTimestamp - 1. This exists for the Paxos path, see PartitionUpdate#updateAllTimestamp for additional details.

markCounterLocalToBeCleared

public abstract ColumnData markCounterLocalToBeCleared()

purge

public abstract ColumnData purge(DeletionPurger purger,
                                 int nowInSec)

maxTimestamp

public abstract long maxTimestamp()