Package com.apple.foundationdb.record.query.predicates

Class NotPredicate

java.lang.Object

com.apple.foundationdb.record.query.predicates.NotPredicate

All Implemented Interfaces:

PlanHashable, Bindable, QueryPredicate

@API(EXPERIMENTAL)
public class NotPredicate
extends Object
implements QueryPredicate

A QueryPredicate that is satisfied when its child component is not satisfied. For tri-valued logic, if the child evaluates to unknown / null, NOT is still unknown.

Field Summary

Fields

Modifier and Type	Field	Description
QueryPredicate	child

Constructor Summary

Constructors

Constructor	Description
NotPredicate(QueryPredicate child)

Method Summary

Modifier and Type	Method	Description
Stream<PlannerBindings>	bindTo(ExpressionMatcher<? extends Bindable> matcher)	Attempt to match the matcher to this bindable object.
boolean	equals(Object o)
<M extends Message> Boolean	eval(FDBRecordStoreBase<M> store, EvaluationContext context, SourceEntry sourceEntry)
QueryPredicate	getChild()
int	hashCode()
int	planHash()	Return a hash similar to hashCode, but with the additional guarantee that is is stable across JVMs.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

child

@Nonnull
public final QueryPredicate child

Constructor Detail

NotPredicate

public NotPredicate(@Nonnull
                    QueryPredicate child)

Method Detail

eval

@Nullable
public <M extends Message> Boolean eval(@Nonnull
                                        FDBRecordStoreBase<M> store,
                                        @Nonnull
                                        EvaluationContext context,
                                        @Nonnull
                                        SourceEntry sourceEntry)

Specified by:

eval in interface QueryPredicate

getChild

@Nonnull
public QueryPredicate getChild()

bindTo

@Nonnull
public Stream<PlannerBindings> bindTo(@Nonnull
                                      ExpressionMatcher<? extends Bindable> matcher)

Description copied from interface: Bindable

Attempt to match the matcher to this bindable object.

Specified by:

bindTo in interface Bindable

Parameters:

matcher - the matcher to match against

Returns:

a map of bindings if the match succeeded, or an empty Optional if it failed

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

planHash

public int planHash()

Description copied from interface: PlanHashable

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

Specified by:

planHash in interface PlanHashable

Returns:

a stable hash code