org.pentaho.di.trans.steps.databaselookup

Interface DatabaseLookupData.Cache

All Known Implementing Classes:

DefaultCache, ReadAllCache

Enclosing class:

DatabaseLookupData

public static interface DatabaseLookupData.Cache

Cache for DatabaseLookup step.

Method Summary

Modifier and Type	Method and Description
Object[]	getRowFromCache(RowMetaInterface lookupMeta, Object[] lookupRow) Returns the very first data row that matches all conditions or null if none has been found.
void	storeRowInCache(DatabaseLookupMeta meta, RowMetaInterface lookupMeta, Object[] lookupRow, Object[] add) Saved add as data row and lookupRow as a key for searching it.

Method Detail

getRowFromCache

Object[] getRowFromCache(RowMetaInterface lookupMeta,
                         Object[] lookupRow)
                  throws KettleException

Returns the very first data row that matches all conditions or null if none has been found. Note, cache should keep the order in which elements were put into it.

Parameters:

lookupMeta - meta object for dealing with lookupRow

lookupRow - tuple containing values for comparison

Returns:

first matching data row or null

Throws:

KettleException

storeRowInCache

void storeRowInCache(DatabaseLookupMeta meta,
                     RowMetaInterface lookupMeta,
                     Object[] lookupRow,
                     Object[] add)

Saved add as data row and lookupRow as a key for searching it.

Parameters:

meta - step's meta

lookupMeta - lookupRow's meta

lookupRow - tuple of keys

add - tuple of data