net.sf.farrago.ojrex
Class FarragoOJRexNullTestImplementor

java.lang.Object
  net.sf.farrago.ojrex.FarragoOJRexImplementor
      net.sf.farrago.ojrex.FarragoOJRexNullTestImplementor

All Implemented Interfaces:

OJRexImplementor

public class FarragoOJRexNullTestImplementor
extends FarragoOJRexImplementor

FarragoOJRexNullTestImplementor implements Farrago specifics of OJRexImplementor for null-test row expressions IS NULL and IS NOT NULL.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/ojrex/FarragoOJRexNullTestImplementor.java#11 $

Author:

John V. Sichi

Field Summary

private boolean

isNull

Constructor Summary

FarragoOJRexNullTestImplementor(boolean isNull)

Method Summary

Expression

implementFarrago(FarragoRexToOJTranslator translator, RexCall call, Expression[] operands) Refined version of OJRexImplementor.implement(org.eigenbase.oj.rex.RexToOJTranslator, org.eigenbase.rex.RexCall, openjava.ptree.Expression[]).

Methods inherited from class net.sf.farrago.ojrex.FarragoOJRexImplementor

canImplement, implement

Methods inherited from class java.lang.Object

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

Field Detail

isNull

private boolean isNull

Constructor Detail

FarragoOJRexNullTestImplementor

public FarragoOJRexNullTestImplementor(boolean isNull)

Method Detail

implementFarrago

public Expression implementFarrago(FarragoRexToOJTranslator translator,
                                   RexCall call,
                                   Expression[] operands)

Description copied from class: FarragoOJRexImplementor

Refined version of OJRexImplementor.implement(org.eigenbase.oj.rex.RexToOJTranslator, org.eigenbase.rex.RexCall, openjava.ptree.Expression[]).

Specified by:

implementFarrago in class FarragoOJRexImplementor

Parameters:

translator - provides Farrago-specific translation context

call - the call to be translated

operands - call's operands, which have already been translated independently