com.illumon.iris.db.v2.sources

Interface ColumnSource<T>

All Known Implementing Classes:

AbstractColumnSource, NullValueColumnSource

public interface ColumnSource<T>

A "source" for column data - allows cell values to be looked up by (long) keys.

Note for implementors: All ColumnSource implementations must map Index.NULL_KEY to a null value for all get and getPrev methods.

Method Summary

Modifier and Type	Method and Description
T	get(long index)
Boolean	getBoolean(long index)
byte	getByte(long index)
byte[]	getBytes(long index, int length, byte[] dest)
char	getChar(long index)
Class<?>	getComponentType()
double	getDouble(long index)
float	getFloat(long index)
Map<T,Index>	getGroupToRange() Compute grouping information for all keys present in this column source.
Map<T,Index>	getGroupToRange(Index index) Compute grouping information for (at least) all keys present in index.
int	getInt(long index)
long	getLong(long index)
T	getPrev(long index)
Boolean	getPrevBoolean(long index)
byte	getPrevByte(long index)
char	getPrevChar(long index)
double	getPrevDouble(long index)
float	getPrevFloat(long index)
int	getPrevInt(long index)
long	getPrevLong(long index)
short	getPrevShort(long index)
long[]	getPrevSortMapping(Index sourceIndex, SortingOrder sortingOrder)
short	getShort(long index)
long[]	getSortMapping(Index sourceIndex, SortingOrder sortingOrder)
Class<T>	getType()
Map<T,Index>	getValuesMapping(Index subRange)
boolean	isImmutable()
Index	match(boolean invertMatch, boolean usePrev, boolean caseInsensitive, Index mapper, Object... keys)
void	releaseCachedResources() Release any resources held for caching purposes.

Method Detail

get

T get(long index)

getBoolean

Boolean getBoolean(long index)

getByte

byte getByte(long index)

getBytes

byte[] getBytes(long index,
                int length,
                byte[] dest)

getChar

char getChar(long index)

getDouble

double getDouble(long index)

getFloat

float getFloat(long index)

getInt

int getInt(long index)

getLong

long getLong(long index)

getShort

short getShort(long index)

getPrev

T getPrev(long index)

getPrevBoolean

Boolean getPrevBoolean(long index)

getPrevByte

byte getPrevByte(long index)

getPrevChar

char getPrevChar(long index)

getPrevDouble

double getPrevDouble(long index)

getPrevFloat

float getPrevFloat(long index)

getPrevInt

int getPrevInt(long index)

getPrevLong

long getPrevLong(long index)

getPrevShort

short getPrevShort(long index)

getType

Class<T> getType()

getComponentType

Class<?> getComponentType()

match

Index match(boolean invertMatch,
            boolean usePrev,
            boolean caseInsensitive,
            Index mapper,
            Object... keys)

getValuesMapping

Map<T,Index> getValuesMapping(Index subRange)

getSortMapping

long[] getSortMapping(Index sourceIndex,
                      SortingOrder sortingOrder)

getPrevSortMapping

long[] getPrevSortMapping(Index sourceIndex,
                          SortingOrder sortingOrder)

getGroupToRange

Map<T,Index> getGroupToRange()

Compute grouping information for all keys present in this column source.

Returns:

A map from distinct data values to an index that contains those values

getGroupToRange

Map<T,Index> getGroupToRange(Index index)

Compute grouping information for (at least) all keys present in index.

Parameters:

index - The index to consider

Returns:

A map from distinct data values to an index that contains those values

isImmutable

boolean isImmutable()

Returns:

true if the values at a given index of the column source never change, false otherwise

releaseCachedResources

void releaseCachedResources()

Release any resources held for caching purposes. Implementations need not guarantee that concurrent accesses are correct, as the purpose of this method is to ensure cleanup for column sources that will no longer be used.