Package com.illumon.iris.db.v2

Interface ReverseLookup

All Known Implementing Classes:

ReverseLookup.Null, ReverseLookupListener

public interface ReverseLookup

For hierarchical table display, identify the row index key that corresponds to a given logical key.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	ReverseLookup.Null	A null implementation of a reverse lookup, suitable for a table without any key columns.

Field Summary

Fields

Modifier and Type	Field	Description
static final ReverseLookup.Null	NULL

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 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.

Field Details

NULL

static final ReverseLookup.Null NULL

Method Details

get

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.

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

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.

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

long getNoEntryValue()

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

getKeyColumns

String[] getKeyColumns()

Returns:

the key columns this reverse lookup is indexed on