Package com.apple.foundationdb.record

Interface PlanHashable

All Known Subinterfaces:

AtomKeyExpression, Comparisons.Comparison, ComponentWithChildren, ComponentWithComparison, ComponentWithNoChildren, ComponentWithSingleChild, Element, KeyExpression, KeyExpressionWithChild, KeyExpressionWithChildren, KeyExpressionWithoutChildren, QueryableKeyExpression, QueryComponent, QueryPlan<T>, QueryPredicate, RecordQueryLoadByKeysPlan.KeysSource, RecordQueryPlan, RecordQueryPlanWithChild, RecordQueryPlanWithChildren, RecordQueryPlanWithComparisons, RecordQueryPlanWithIndex, RecordQueryPlanWithNoChildren, RecordQueryPlanWithRequiredFields, SyntheticRecordFromStoredRecordPlan, SyntheticRecordPlan

All Known Implementing Classes:

AndComponent, AndOrComponent, AndOrPredicate, AndPredicate, BaseField, BaseKeyExpression, BaseNestedField, CollateFunctionKeyExpression, CollateFunctionKeyExpressionFactoryJRE.CollateFunctionKeyExpressionJRE, Comparisons.ListComparison, Comparisons.MultiColumnComparison, Comparisons.NullComparison, Comparisons.ParameterComparison, Comparisons.SimpleComparison, Comparisons.TextComparison, Comparisons.TextContainsAllPrefixesComparison, Comparisons.TextWithMaxDistanceComparison, ComposedBitmapIndexQueryPlan, ComposedBitmapIndexQueryPlan.ComposerBase, ElementKeyExpression, ElementPredicate, EmptyComparison, EmptyKeyExpression, FieldElement, FieldKeyExpression, FieldWithComparison, FunctionKeyExpression, GroupingKeyExpression, IndexAggregateFunction, IndexRecordFunction, IndexScanType, KeyWithValueExpression, ListKeyExpression, LiteralElement, LiteralKeyExpression, NestedField, NestingKeyExpression, NotComponent, NotPredicate, OneOfThemWithComparison, OneOfThemWithComponent, OrComponent, OrPredicate, QueryKeyExpressionWithComparison, QueryRecordFunction, QueryRecordFunctionWithComparison, RecordFunction, RecordQueryCoveringIndexPlan, RecordQueryFetchFromPartialRecordPlan, RecordQueryFilterPlan, RecordQueryIndexPlan, RecordQueryInJoinPlan, RecordQueryInParameterJoinPlan, RecordQueryIntersectionPlan, RecordQueryInValuesJoinPlan, RecordQueryLoadByKeysPlan, RecordQueryPredicateFilterPlan, RecordQueryScanPlan, RecordQueryScoreForRankPlan, RecordQueryScoreForRankPlan.ScoreForRank, RecordQueryTextIndexPlan, RecordQueryTypeFilterPlan, RecordQueryUnionPlan, RecordQueryUnionPlanBase, RecordQueryUnorderedDistinctPlan, RecordQueryUnorderedPrimaryKeyDistinctPlan, RecordQueryUnorderedUnionPlan, RecordTypeElement, RecordTypeKeyComparison, RecordTypeKeyExpression, ScanComparisons, ScanComparisons.Builder, SplitKeyExpression, StoreRecordFunction, TextScan, ThenKeyExpression, TimeWindowAggregateFunction, TimeWindowRecordFunction, ValueElement, VersionElement, VersionKeyExpression

@API(UNSTABLE)
public interface PlanHashable

A more stable version of Object.hashCode().

Method Summary

Modifier and Type	Method	Description
static int	combineHashes(List<Integer> hashes)
static int	iterablePlanHash(Iterable<?> objects)
static int	objectPlanHash(Object obj)
static int	objectsPlanHash(Object... objects)
int	planHash()	Return a hash similar to hashCode, but with the additional guarantee that is is stable across JVMs.
static int	planHash(PlanHashable... hashables)
static int	planHash(Iterable<? extends PlanHashable> hashables)
static int	planHashUnordered(Iterable<? extends PlanHashable> hashables)
static int	stringHashUnordered(Iterable<String> strings)

Method Detail

planHash

int planHash()

Return a hash similar to hashCode, but with the additional guarantee that is is stable across JVMs.

Returns:

a stable hash code

planHash

static int planHash(@Nonnull
                    Iterable<? extends PlanHashable> hashables)

planHash

static int planHash(PlanHashable... hashables)

planHashUnordered

static int planHashUnordered(@Nonnull
                             Iterable<? extends PlanHashable> hashables)

stringHashUnordered

static int stringHashUnordered(@Nonnull
                               Iterable<String> strings)

combineHashes

static int combineHashes(@Nonnull
                         List<Integer> hashes)

objectPlanHash

static int objectPlanHash(@Nullable
                          Object obj)

iterablePlanHash

static int iterablePlanHash(@Nonnull
                            Iterable<?> objects)

objectsPlanHash

static int objectsPlanHash(Object... objects)