com.redhat.lightblue.assoc

Interface QueryPlanScorer

All Known Implementing Classes:

IndexedFieldScorer, SimpleScorer

public interface QueryPlanScorer

The implementation should assign a score to the query plan, and return it in a structure that can be compared using Comparable interface methods. It is up to the implementation to decide whether this will be a stateful or stateless implementation.

Method Summary

Modifier and Type	Method and Description
QueryPlanData	newDataInstance() Returns a new instance for an implementation of QueryPlanData used by this scorer
void	reset(QueryPlanChooser c) Initialize the scorer instance before the iteration of possible query plans
Comparable	score(QueryPlan p) Returns a score for the query plan

Method Detail

newDataInstance

QueryPlanData newDataInstance()

Returns a new instance for an implementation of QueryPlanData used by this scorer

reset

void reset(QueryPlanChooser c)

Initialize the scorer instance before the iteration of possible query plans

score

Comparable score(QueryPlan p)

Returns a score for the query plan