org.eigenbase.rel.convert
Class FactoryConverterRule

java.lang.Object
  org.eigenbase.relopt.RelOptRule
      org.eigenbase.rel.convert.ConverterRule
          org.eigenbase.rel.convert.FactoryConverterRule

public class FactoryConverterRule
extends ConverterRule

Generic implementation of ConverterRule which lets a ConverterFactory do the work.

Since:

Jun 18, 2003

Version:

$Id: //open/dev/farrago/src/org/eigenbase/rel/convert/FactoryConverterRule.java#9 $

Author:

jhyde

Field Summary

private ConverterFactory

factory

Fields inherited from class org.eigenbase.relopt.RelOptRule

ANY, description, operands

Constructor Summary

FactoryConverterRule(ConverterFactory factory)

Method Summary

RelNode	convert(RelNode rel)
boolean	isGuaranteed() Returns true if this rule can convert any relational expression of the input convention.

Methods inherited from class org.eigenbase.rel.convert.ConverterRule

getInTrait, getOutConvention, getOutTrait, getTraitDef, onMatch

Methods inherited from class org.eigenbase.relopt.RelOptRule

convert, equals, equals, getOperand, getOperands, hashCode, matches, mergeTraitsAndConvert, mergeTraitsAndConvert, toString

Methods inherited from class java.lang.Object

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

Field Detail

factory

private final ConverterFactory factory

Constructor Detail

FactoryConverterRule

public FactoryConverterRule(ConverterFactory factory)

Method Detail

isGuaranteed

public boolean isGuaranteed()

Description copied from class: ConverterRule

Returns true if this rule can convert any relational expression of the input convention.

The union-to-java converter, for example, is not guaranteed, because it only works on unions.

Overrides:

isGuaranteed in class ConverterRule

convert

public RelNode convert(RelNode rel)

Specified by:

convert in class ConverterRule