Package tools.refinery.interpreter.rete.util

Class ReteHintOptions

java.lang.Object

tools.refinery.interpreter.rete.util.ReteHintOptions

public final class ReteHintOptions
extends Object

Provides key objects (of type QueryHintOption) for QueryEvaluationHints.

Since:

1.5

Field Summary

Fields

Modifier and Type	Field	Description
static final QueryHintOption<Boolean>	cacheOutputOfEvaluatorsByDefault
static final QueryHintOption<Boolean>	deleteRederiveEvaluation	Deprecated. Use DRedReteBackendFactory instead of setting this option to true.
static final QueryHintOption<Boolean>	expandWeakenedAlternativeConstraints	This hint allows the query planner to take advantage of "weakened alternative" suggestions of the meta context.
static final QueryHintOption<Boolean>	prioritizeConstantFiltering
static final QueryHintOption<Boolean>	useDiscriminatorDispatchersForConstantFiltering

Method Summary

Methods inherited from class java.lang.Object

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

Field Details

useDiscriminatorDispatchersForConstantFiltering

public static final QueryHintOption<Boolean> useDiscriminatorDispatchersForConstantFiltering

prioritizeConstantFiltering

public static final QueryHintOption<Boolean> prioritizeConstantFiltering

cacheOutputOfEvaluatorsByDefault

public static final QueryHintOption<Boolean> cacheOutputOfEvaluatorsByDefault

deleteRederiveEvaluation

@Deprecated
public static final QueryHintOption<Boolean> deleteRederiveEvaluation

Deprecated.

Use DRedReteBackendFactory instead of setting this option to true.

The incremental query evaluator backend can evaluate recursive patterns. However, by default, instance models that contain cycles are not supported with recursive queries and can lead to incorrect query results. Enabling Delete And Rederive (DRED) mode guarantees that recursive query evaluation leads to correct results in these cases as well.

As DRED may diminish the performance of incremental maintenance, it is not enabled by default.

Since:

1.6

expandWeakenedAlternativeConstraints

public static final QueryHintOption<Boolean> expandWeakenedAlternativeConstraints

This hint allows the query planner to take advantage of "weakened alternative" suggestions of the meta context. For instance, enumerable unary type constraints may be substituted with a simple type filtering where sufficient.

Since:

1.6