net.sf.farrago.ojrex
Class FarragoOJRexCaseImplementor

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

All Implemented Interfaces:

OJRexImplementor

public class FarragoOJRexCaseImplementor
extends FarragoOJRexImplementor

FarragoOJRexCaseImplementor implements Farrago specifics of OJRexImplementor for CASE expressions.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/ojrex/FarragoOJRexCaseImplementor.java#10 $

Author:

Xiaoyang Luo

Constructor Summary

FarragoOJRexCaseImplementor()

Method Summary

boolean	canImplement(RexCall call) Tests whether it is possible to implement a call.
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

implement

Methods inherited from class java.lang.Object

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

Constructor Detail

FarragoOJRexCaseImplementor

public FarragoOJRexCaseImplementor()

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

canImplement

public boolean canImplement(RexCall call)

Description copied from interface: OJRexImplementor

Tests whether it is possible to implement a call.

Specified by:

canImplement in interface OJRexImplementor

Overrides:

canImplement in class FarragoOJRexImplementor

Parameters:

call - the call for which translation is being considered

Returns:

whether the call can be implemented