org.apache.calcite.rel.metadata

Class ReflectiveRelMetadataProvider.Space

java.lang.Object

org.apache.calcite.rel.metadata.ReflectiveRelMetadataProvider.Space

Direct Known Subclasses:

ReflectiveRelMetadataProvider.Space2

Enclosing class:

ReflectiveRelMetadataProvider

static class ReflectiveRelMetadataProvider.Space
extends Object

Workspace for computing which methods can act as handlers for given metadata methods.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) Set<Class<RelNode>>	classes
(package private) Map<Pair<Class<RelNode>,Method>,Method>	handlerMap
(package private) com.google.common.collect.ImmutableMultimap<Method,MetadataHandler>	providerMap

Constructor Summary

Constructors

Constructor and Description
Space(com.google.common.collect.Multimap<Method,MetadataHandler> providerMap)

Method Summary

Modifier and Type	Method and Description
(package private) Method	find(Class<? extends RelNode> relNodeClass, Method method) Finds an implementation of a method for relNodeClass or its nearest base class.

Methods inherited from class java.lang.Object

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

Field Detail

classes

final Set<Class<RelNode>> classes

handlerMap

final Map<Pair<Class<RelNode>,Method>,Method> handlerMap

providerMap

final com.google.common.collect.ImmutableMultimap<Method,MetadataHandler> providerMap

Constructor Detail

Space

Space(com.google.common.collect.Multimap<Method,MetadataHandler> providerMap)

Method Detail

find

Method find(Class<? extends RelNode> relNodeClass,
            Method method)

Finds an implementation of a method for relNodeClass or its nearest base class. Assumes that base classes have already been added to map.