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

Class RelationalExpressionPointerSet<T extends RelationalExpression>

java.lang.Object

java.util.AbstractCollection<T>

com.apple.foundationdb.record.query.plan.temp.RelationalExpressionPointerSet<T>

Type Parameters:

T - the planner expression type contained in the set

All Implemented Interfaces:

Iterable<T>, Collection<T>

public class RelationalExpressionPointerSet<T extends RelationalExpression>
extends AbstractCollection<T>

A set of RelationalExpressions that uses reference ("pointer") equality to determine equivalence for the purposes of set membership, rather than the Object.equals(Object) method used by the Java Set interface. This is important for implementing the memo data structure in GroupExpressionRef

Constructor Summary

Constructors

Constructor	Description
RelationalExpressionPointerSet()

Method Summary

Modifier and Type	Method	Description
boolean	add(T expression)
void	addAll(RelationalExpressionPointerSet<T> otherSet)
void	clear()
boolean	contains(Object o)
boolean	contains(T expression)
boolean	isEmpty()
Iterator<T>	iterator()
boolean	remove(T expression)
int	size()

Methods inherited from class java.util.AbstractCollection

addAll, containsAll, remove, removeAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Collection

equals, hashCode, parallelStream, removeIf, spliterator, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

RelationalExpressionPointerSet

public RelationalExpressionPointerSet()

Method Detail

add

public boolean add(@Nonnull
                   T expression)

Specified by:

add in interface Collection<T extends RelationalExpression>

Overrides:

add in class AbstractCollection<T extends RelationalExpression>

addAll

public void addAll(@Nonnull
                   RelationalExpressionPointerSet<T> otherSet)

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection<T extends RelationalExpression>

Overrides:

contains in class AbstractCollection<T extends RelationalExpression>

contains

public boolean contains(@Nonnull
                        T expression)

remove

public boolean remove(@Nonnull
                      T expression)

clear

public void clear()

Specified by:

clear in interface Collection<T extends RelationalExpression>

Overrides:

clear in class AbstractCollection<T extends RelationalExpression>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<T extends RelationalExpression>

Overrides:

isEmpty in class AbstractCollection<T extends RelationalExpression>

size

public int size()

Specified by:

size in interface Collection<T extends RelationalExpression>

Specified by:

size in class AbstractCollection<T extends RelationalExpression>

iterator

@Nonnull
public Iterator<T> iterator()

Specified by:

iterator in interface Collection<T extends RelationalExpression>

Specified by:

iterator in interface Iterable<T extends RelationalExpression>

Specified by:

iterator in class AbstractCollection<T extends RelationalExpression>