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

Class AnyChildrenMatcher

java.lang.Object

com.apple.foundationdb.record.query.plan.temp.matchers.AnyChildrenMatcher

All Implemented Interfaces:

ExpressionChildrenMatcher

public class AnyChildrenMatcher
extends Object
implements ExpressionChildrenMatcher

A children matcher that matches any set of children.

Field Summary

Fields

Modifier and Type	Field and Description
static ExpressionChildrenMatcher	ANY

Method Summary

Modifier and Type	Method and Description
Stream<PlannerBindings>	matches(Iterator<? extends Bindable> childIterator) Apply this matcher to the children provided by the given iterator and produce a stream of possible bindings.

Methods inherited from class java.lang.Object

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

Field Detail

ANY

public static final ExpressionChildrenMatcher ANY

Method Detail

matches

@Nonnull
public Stream<PlannerBindings> matches(@Nonnull
                                                Iterator<? extends Bindable> childIterator)

Description copied from interface: ExpressionChildrenMatcher

Apply this matcher to the children provided by the given iterator and produce a stream of possible bindings. If the match is not successful, produce an empty stream. Note that this method should not generally match to the children themselves; instead, it should delegate that work to one or more inner ExpressionMatchers.

Specified by:

matches in interface ExpressionChildrenMatcher

Parameters:

childIterator - an iterator of references to the children of a planner expression

Returns:

a stream of the possible bindings from applying this match to the children in the given iterator