Package tools.refinery.interpreter.matchers.psystem.basicdeferred

Class RelationEvaluation

java.lang.Object

tools.refinery.interpreter.matchers.psystem.BasePConstraint

tools.refinery.interpreter.matchers.psystem.EnumerablePConstraint

tools.refinery.interpreter.matchers.psystem.basicdeferred.RelationEvaluation

All Implemented Interfaces:

IMultiQueryReference, PConstraint, PTraceable

public class RelationEvaluation
extends EnumerablePConstraint
implements IMultiQueryReference

A constraint which prescribes the evaluation of custom Java logic that takes an arbitrary number of input relations and produces one output relation. Contrast this to ExpressionEvaluation, which produces a single output value given an input tuple. The assumption is that the relation evaluation logic is not incremental, that is, it can only perform from-scratch computation of the output relation given the complete input relations. To this end, the relation evaluator always receives the complete input relations with all their contents as input. However, the evaluator engine makes sure that the output of the relation evaluation is at least "seemingly" incremental. This means that the underlying computation network computes the delta on the output compared to the previous output and only propagates the delta further.

Since:

2.8

Field Summary

Fields inherited from class tools.refinery.interpreter.matchers.psystem.EnumerablePConstraint

variablesTuple

Fields inherited from class tools.refinery.interpreter.matchers.psystem.BasePConstraint

pBody

Fields inherited from interface tools.refinery.interpreter.matchers.psystem.PConstraint

COMPARE_BY_MONOTONOUS_ID

Constructor Summary

Constructors

Constructor	Description
RelationEvaluation(PBody body, Tuple variablesTuple, List<PQuery> inputQueries, IRelationEvaluator evaluator)

Method Summary

Modifier and Type	Method	Description
IRelationEvaluator	getEvaluator()
List<PQuery>	getReferredQueries()

Methods inherited from class tools.refinery.interpreter.matchers.psystem.EnumerablePConstraint

doReplaceVariable, getDeducedVariables, getVariableInTuple, getVariablesTuple, toStringRest, toStringRestRest

Methods inherited from class tools.refinery.interpreter.matchers.psystem.BasePConstraint

checkSanity, delete, getAffectedVariables, getBody, getFunctionalDependencies, getMonotonousID, getPSystem, replaceVariable, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

RelationEvaluation

public RelationEvaluation(PBody body,
 Tuple variablesTuple,
 List<PQuery> inputQueries,
 IRelationEvaluator evaluator)

Method Details

getEvaluator

public IRelationEvaluator getEvaluator()

getReferredQueries

public List<PQuery> getReferredQueries()

Specified by:

getReferredQueries in interface IMultiQueryReference