com.espertech.esper.pattern.guard
Interface GuardFactory

All Known Implementing Classes:

ExpressionGuardFactory, GuardFactorySupport, TimerWithinGuardFactory, TimerWithinOrMaxCountGuardFactory

public interface GuardFactory

Interface for a factory for Guard instances.

Method Summary

Guard	makeGuard(PatternAgentInstanceContext context, MatchedEventMap beginState, Quitable quitable, EvalStateNodeNumber stateNodeId, java.lang.Object guardState) Constructs a guard instance.
void	setGuardParameters(java.util.List<ExprNode> guardParameters, MatchedEventConvertor convertor) Sets the guard object parameters.

Method Detail

setGuardParameters

void setGuardParameters(java.util.List<ExprNode> guardParameters,
                        MatchedEventConvertor convertor)
                        throws GuardParameterException

Sets the guard object parameters.

Parameters:

guardParameters - is a list of parameters

convertor - for converting a

Throws:

GuardParameterException - thrown to indicate a parameter problem

makeGuard

Guard makeGuard(PatternAgentInstanceContext context,
                MatchedEventMap beginState,
                Quitable quitable,
                EvalStateNodeNumber stateNodeId,
                java.lang.Object guardState)

Constructs a guard instance.

Parameters:

context - - services for use by guard

beginState - - the prior matching events

quitable - - to use for indicating the guard has quit

stateNodeId - - a node id for the state object

guardState - - state node for guard

Returns:

guard instance