org.eclipse.scada.hd

Interface Query

All Known Implementing Classes:

ErrorQueryImpl, ErrorQueryImpl, QueryImpl, QueryImpl, QueryImpl, QueryImpl, QueryImpl

public interface Query

An interface for querying historical value data

See QueryListener for implementation requirements on data notification.

Since:

0.14.0

Author:

Jens Reimann <jens.reimann@th4-systems.com>

See Also:

QueryListener

Method Summary

Methods

Modifier and Type	Method and Description
void	changeParameters(QueryParameters parameters) Request a change of parameters
void	close() Close the query

Method Detail

close

void close()

Close the query

changeParameters

void changeParameters(QueryParameters parameters)

Request a change of parameters

Parameters:

parameters - the new requested parameters