org.eclipse.scada.hd.server.common

Interface HistoricalItem

All Known Subinterfaces:

StorageHistoricalItem

All Known Implementing Classes:

AbstractStorageImpl, HistoricalItemImpl, HSDBHistoricalItem, ProxyHistoricalItem, StorageImpl, StorageImpl

public interface HistoricalItem

An interface of a historical item

Author:

Jens Reimann

Method Summary

Modifier and Type	Method and Description
Query	createQuery(QueryParameters parameters, QueryListener listener, boolean updateData) Create a new query
HistoricalItemInformation	getInformation() Get the item information

Method Detail

createQuery

Query createQuery(QueryParameters parameters,
                  QueryListener listener,
                  boolean updateData)

Create a new query

Parameters:

parameters - the initial query parameters

listener - the query listener

updateData - if true then additional updates will be made by the query when data changes although the query is QueryState.COMPLETE

Returns:

the new query or null if the query could be be created

getInformation

HistoricalItemInformation getInformation()

Get the item information

Returns:

the item information