org.pentaho.di.trans.steps.databaselookup

接口 DatabaseLookupData.Cache

所有已知实现类:

DefaultCache, ReadAllCache

封闭类:

DatabaseLookupData

public static interface DatabaseLookupData.Cache

Cache for DatabaseLookup step.

方法概要

限定符和类型	方法和说明
Object[]	getRowFromCache(org.pentaho.di.core.row.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, org.pentaho.di.core.row.RowMetaInterface lookupMeta, Object[] lookupRow, Object[] add) Saved add as data row and lookupRow as a key for searching it.

方法详细资料

getRowFromCache

Object[] getRowFromCache(org.pentaho.di.core.row.RowMetaInterface lookupMeta,
                         Object[] lookupRow)
                  throws org.pentaho.di.core.exception.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.

参数:

lookupMeta - meta object for dealing with lookupRow

lookupRow - tuple containing values for comparison

返回:

first matching data row or null

抛出:

org.pentaho.di.core.exception.KettleException

storeRowInCache

void storeRowInCache(DatabaseLookupMeta meta,
                     org.pentaho.di.core.row.RowMetaInterface lookupMeta,
                     Object[] lookupRow,
                     Object[] add)

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

参数:

meta - step's meta

lookupMeta - lookupRow's meta

lookupRow - tuple of keys

add - tuple of data