net.sf.farrago.ojrex
Class FarragoOJRexTruthTestImplementor

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

All Implemented Interfaces:

OJRexImplementor

public class FarragoOJRexTruthTestImplementor
extends FarragoOJRexImplementor

FarragoOJRexTruthTestImplementor implements Farrago specifics of OJRexImplementor for truth-test row expressions IS TRUE and IS FALSE.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/ojrex/FarragoOJRexTruthTestImplementor.java#13 $

Author:

John V. Sichi

Field Summary

private boolean	isTrue
private boolean	negated

Constructor Summary

FarragoOJRexTruthTestImplementor(boolean isTrue, boolean negated)

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[]).
private Expression	maybeNegate(Expression expr, boolean negate)

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

isTrue

private final boolean isTrue

negated

private final boolean negated

Constructor Detail

FarragoOJRexTruthTestImplementor

public FarragoOJRexTruthTestImplementor(boolean isTrue,
                                        boolean negated)

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

maybeNegate

private Expression maybeNegate(Expression expr,
                               boolean negate)