org.eigenbase.relopt.volcano
Class ChainedPhaseRuleMappingInitializer

java.lang.Object
  org.eigenbase.relopt.volcano.ChainedPhaseRuleMappingInitializer

All Implemented Interfaces:

VolcanoPlannerPhaseRuleMappingInitializer

public abstract class ChainedPhaseRuleMappingInitializer
extends Object
implements VolcanoPlannerPhaseRuleMappingInitializer

ChainedPhaseRuleMappingInitializer is an abstract implementation of VolcanoPlannerPhaseRuleMappingInitializer that allows additional rules to be layered ontop of those configured by a subordinate VolcanoPlannerPhaseRuleMappingInitializer.

Author:

Stephan Zuercher

See Also:

VolcanoPlannerPhaseRuleMappingInitializer

Field Summary

private VolcanoPlannerPhaseRuleMappingInitializer

subordinate

Constructor Summary

ChainedPhaseRuleMappingInitializer(VolcanoPlannerPhaseRuleMappingInitializer subordinate)

Method Summary

abstract void	chainedInitialize(Map<VolcanoPlannerPhase,Set<String>> phaseRuleMap) Extend this method to provide phase-to-rule mappings beyond what is provided by this initializer's subordinate.
void	initialize(Map<VolcanoPlannerPhase,Set<String>> phaseRuleMap) Initializes a VolcanoPlannerPhase-to-rule map.

Methods inherited from class java.lang.Object

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

Field Detail

subordinate

private final VolcanoPlannerPhaseRuleMappingInitializer subordinate

Constructor Detail

ChainedPhaseRuleMappingInitializer

public ChainedPhaseRuleMappingInitializer(VolcanoPlannerPhaseRuleMappingInitializer subordinate)

Method Detail

initialize

public final void initialize(Map<VolcanoPlannerPhase,Set<String>> phaseRuleMap)

Description copied from interface: VolcanoPlannerPhaseRuleMappingInitializer

Initializes a VolcanoPlannerPhase-to-rule map. Rules are specified by description (see above). When this method is called, the map will already be pre-initialized with empty sets for each VolcanoPlannerPhase. Implementations must not return having added or removed keys from the map, although it is safe to temporarily add or remove keys.

Specified by:

initialize in interface VolcanoPlannerPhaseRuleMappingInitializer

Parameters:

phaseRuleMap - a VolcanoPlannerPhase-to-rule map

chainedInitialize

public abstract void chainedInitialize(Map<VolcanoPlannerPhase,Set<String>> phaseRuleMap)

Extend this method to provide phase-to-rule mappings beyond what is provided by this initializer's subordinate.

When this method is called, the map will already be pre-initialized with empty sets for each VolcanoPlannerPhase. Implementations must not return having added or removed keys from the map, although it is safe to temporarily add or remove keys.

Parameters:

phaseRuleMap - the VolcanoPlannerPhase-rule description map

See Also:

VolcanoPlannerPhaseRuleMappingInitializer