net.sf.farrago.ojrex
Class FarragoOJRexImplementor

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

All Implemented Interfaces:

OJRexImplementor

Direct Known Subclasses:

FarragoOJRexBinaryExpressionImplementor, FarragoOJRexBuiltinImplementor, FarragoOJRexCaseImplementor, FarragoOJRexCastImplementor, FarragoOJRexColumnListImplementor, FarragoOJRexNextValueImplementor, FarragoOJRexNullTestImplementor, FarragoOJRexReinterpretImplementor, FarragoOJRexRowImplementor, FarragoOJRexSimilarLikeImplementor, FarragoOJRexStaticMethodImplementor, FarragoOJRexTruthTestImplementor, FarragoOJRexUnaryExpressionImplementor

public abstract class FarragoOJRexImplementor
extends Object
implements OJRexImplementor

FarragoOJRexImplementor refines OJRexImplementor to provide Farrago-specific context.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/ojrex/FarragoOJRexImplementor.java#12 $

Author:

John V. Sichi

Constructor Summary

FarragoOJRexImplementor()

Method Summary

boolean	canImplement(RexCall call) Tests whether it is possible to implement a call.
Expression	implement(RexToOJTranslator translator, RexCall call, Expression[] operands) Implements a single RexCall.
abstract 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 java.lang.Object

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

Constructor Detail

FarragoOJRexImplementor

public FarragoOJRexImplementor()

Method Detail

implement

public Expression implement(RexToOJTranslator translator,
                            RexCall call,
                            Expression[] operands)

Description copied from interface: OJRexImplementor

Implements a single RexCall.

Specified by:

implement in interface OJRexImplementor

Parameters:

translator - provides translation context

call - the call to be translated

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

implementFarrago

public abstract 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[]).

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

Parameters:

call - the call for which translation is being considered

Returns:

whether the call can be implemented