Package com.apple.foundationdb.record.query.plan.temp

Class PrimaryAccessExpansionVisitor

java.lang.Object

com.apple.foundationdb.record.query.plan.temp.ValueIndexLikeExpansionVisitor

com.apple.foundationdb.record.query.plan.temp.PrimaryAccessExpansionVisitor

All Implemented Interfaces:

ExpansionVisitor<ValueIndexLikeExpansionVisitor.VisitorState>, KeyExpressionVisitor<ValueIndexLikeExpansionVisitor.VisitorState,GraphExpansion>

public class PrimaryAccessExpansionVisitor
extends ValueIndexLikeExpansionVisitor

Class to expand primary data access into a candidate. The visitation methods are left unchanged from the super class ValueIndexLikeExpansionVisitor, this class merely provides a specific expand(com.apple.foundationdb.record.query.plan.temp.Quantifier.ForEach, com.apple.foundationdb.record.metadata.expressions.KeyExpression, boolean) method.

Nested Class Summary

Nested classes/interfaces inherited from class com.apple.foundationdb.record.query.plan.temp.ValueIndexLikeExpansionVisitor

ValueIndexLikeExpansionVisitor.VisitorState

Nested classes/interfaces inherited from interface com.apple.foundationdb.record.query.plan.temp.KeyExpressionVisitor

KeyExpressionVisitor.Result, KeyExpressionVisitor.State

Constructor Summary

Constructors

Constructor	Description
PrimaryAccessExpansionVisitor(Set<String> availableRecordTypes, Set<String> recordTypes)

Method Summary

Modifier and Type	Method	Description
PrimaryScanMatchCandidate	expand(Quantifier.ForEach baseQuantifier, KeyExpression primaryKey, boolean isReverse)	Method that expands a data structure into a data flow graph

Methods inherited from class com.apple.foundationdb.record.query.plan.temp.ValueIndexLikeExpansionVisitor

getCurrentState, pop, pop, push, visitExpression, visitExpression, visitExpression, visitExpression, visitExpression, visitExpression, visitExpression

Methods inherited from class java.lang.Object

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

Constructor Detail

PrimaryAccessExpansionVisitor

public PrimaryAccessExpansionVisitor(@Nonnull
                                     Set<String> availableRecordTypes,
                                     @Nonnull
                                     Set<String> recordTypes)

Method Detail

expand

@Nonnull
public PrimaryScanMatchCandidate expand(@Nonnull
                                        Quantifier.ForEach baseQuantifier,
                                        @Nullable
                                        KeyExpression primaryKey,
                                        boolean isReverse)

Description copied from interface: ExpansionVisitor

Method that expands a data structure into a data flow graph

Parameters:

baseQuantifier - a quantifier representing the base data access

primaryKey - the primary key of the data object the caller wants to access

isReverse - an indicator whether the result set is expected to be returned in reverse order

Returns:

a new MatchCandidate that can be used for matching.