Package com.apple.foundationdb.record.query.expressions

Class OrComponent

java.lang.Object

com.apple.foundationdb.record.query.expressions.AndOrComponent

com.apple.foundationdb.record.query.expressions.OrComponent

All Implemented Interfaces:

PlanHashable, ComponentWithChildren, QueryComponent

@API(MAINTAINED)
public class OrComponent
extends AndOrComponent

A QueryComponent that is satisfied when any of its child components is satisfied. For tri-valued logic:

• If any child is true, then true.
• If all children are false, then false.
• Else null.

Constructor Summary

Constructors

Constructor	Description
OrComponent(List<QueryComponent> operands)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
static OrComponent	from(List<QueryComponent> operands)
List<QueryComponent>	getChildren()	Children for this component, at least 2 of them.
int	hashCode()
boolean	isOr()
QueryPredicate	normalizeForPlanner(Source source, List<String> fieldNamePrefix)	Convert this query component into an equivalent QueryPredicate by pushing all information about nested and repeated fields to Elements inside of ElementPredicates.
int	planHash()	Return a hash similar to hashCode, but with the additional guarantee that is is stable across JVMs.
String	toString()
void	validate(Descriptors.Descriptor descriptor)
QueryComponent	withOtherChildren(List<QueryComponent> newChildren)

Methods inherited from class com.apple.foundationdb.record.query.expressions.AndOrComponent

evalMessage, evalMessageAsync, isAsync, normalizeChildrenForPlanner

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.apple.foundationdb.record.query.expressions.ComponentWithChildren

getChildren

Methods inherited from interface com.apple.foundationdb.record.query.expressions.QueryComponent

eval, evalAsync, normalizeForPlanner, validate

Constructor Detail

OrComponent

public OrComponent(List<QueryComponent> operands)

Method Detail

from

public static OrComponent from(@Nonnull
                               List<QueryComponent> operands)

isOr

public boolean isOr()

Specified by:

isOr in class AndOrComponent

toString

public String toString()

Overrides:

toString in class Object

withOtherChildren

public QueryComponent withOtherChildren(List<QueryComponent> newChildren)

normalizeForPlanner

@Nonnull
public QueryPredicate normalizeForPlanner(@Nonnull
                                          Source source,
                                          @Nonnull
                                          List<String> fieldNamePrefix)

Description copied from interface: QueryComponent

Convert this query component into an equivalent QueryPredicate by pushing all information about nested and repeated fields to Elements inside of ElementPredicates.

This normalization process requires tracking some state: the name of a nested field is available only at the relevant NestedField, but that information is necessary to construct the ElementPredicate at the leaves of the sub-tree rooted at that nested field. This extra information is tracked in the given fieldNamePrefix.

Parameters:

source - the source representing the input stream of the key expression

fieldNamePrefix - the (non-repeated) field names on the path from the most recent source to this part of the query component

Returns:

an equivalent query predicate

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.

Returns:

a stable hash code

validate

public void validate(@Nonnull
                     Descriptors.Descriptor descriptor)

getChildren

@Nonnull
public List<QueryComponent> getChildren()

Children for this component, at least 2 of them.

Returns:

the children of this component