Package com.illumon.iris.db.v2

Class ReverseLookup.Null

java.lang.Object

com.illumon.iris.db.v2.ReverseLookup.Null

All Implemented Interfaces:

ReverseLookup

Enclosing interface:

ReverseLookup

public static class ReverseLookup.Null
extends Object
implements ReverseLookup

A null implementation of a reverse lookup, suitable for a table without any key columns.

Nested Class Summary

Nested classes/interfaces inherited from interface com.illumon.iris.db.v2.ReverseLookup

ReverseLookup.Null

Field Summary

Fields inherited from interface com.illumon.iris.db.v2.ReverseLookup

NULL

Constructor Summary

Constructors

Constructor	Description
Null(String... keyColumns)

Method Summary

Modifier and Type	Method	Description
long	get(Object key)	Gets the index value where key exists in the table, or the no-entry-value if it is not found in the table.
String[]	getKeyColumns()
long	getNoEntryValue()	Returns the value that will be returned from ReverseLookup.get(java.lang.Object) or if no entry exists for a given key.
long	getPrev(Object key)	Gets the index value where key previously in the table, or the no-entry-value if it is was not found in the table.

Methods inherited from class java.lang.Object

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

Constructor Details

Null

public Null(String... keyColumns)

Method Details

get

public long get(Object key)

Description copied from interface: ReverseLookup

Gets the index value where key exists in the table, or the no-entry-value if it is not found in the table.

Specified by:

get in interface ReverseLookup

Parameters:

key - a single object for a single column, or a SmartKey for multiple columns

Returns:

the row index where key exists in the table

getPrev

public long getPrev(Object key)

Description copied from interface: ReverseLookup

Gets the index value where key previously in the table, or the no-entry-value if it is was not found in the table.

Specified by:

getPrev in interface ReverseLookup

Parameters:

key - a single object for a single column, or a SmartKey for multiple columns

Returns:

the row index where key previously existed in the table

getNoEntryValue

public long getNoEntryValue()

Description copied from interface: ReverseLookup

Returns the value that will be returned from ReverseLookup.get(java.lang.Object) or if no entry exists for a given key.

Specified by:

getNoEntryValue in interface ReverseLookup

getKeyColumns

public String[] getKeyColumns()

Specified by:

getKeyColumns in interface ReverseLookup

Returns:

the key columns this reverse lookup is indexed on