org.eclipse.scada.hds

Interface ValueSource

All Known Implementing Classes:

AbstractValueSource, DataStoreAccesor

public interface ValueSource

Method Summary

Methods

Modifier and Type	Method and Description
void	addListener(DataStoreListener listener)
void	removeListener(DataStoreListener listener)
boolean	visit(ValueVisitor visitor, java.util.Date start, java.util.Date end) Visit the value source

Method Detail

visit

boolean visit(ValueVisitor visitor,
            java.util.Date start,
            java.util.Date end)

Visit the value source

Parameters:

visitor - the visitor

start - the start timestamp

end - the end timestamp

Returns:

true if more data should be read, false otherwise

addListener

void addListener(DataStoreListener listener)

removeListener

void removeListener(DataStoreListener listener)