org.eigenbase.oj.rex
Interface OJRexImplementor

All Known Implementing Classes:

FarragoOJRexBinaryExpressionImplementor, FarragoOJRexBuiltinImplementor, FarragoOJRexCaseImplementor, FarragoOJRexCastImplementor, FarragoOJRexColumnListImplementor, FarragoOJRexContextVariableImplementor, FarragoOJRexImplementor, FarragoOJRexNextValueImplementor, FarragoOJRexNullTestImplementor, FarragoOJRexReinterpretImplementor, FarragoOJRexRowImplementor, FarragoOJRexSimilarLikeImplementor, FarragoOJRexStaticMethodImplementor, FarragoOJRexTruthTestImplementor, FarragoOJRexUnaryExpressionImplementor, FarragoUserDefinedRoutine, OJRexBinaryExpressionImplementor, OJRexCastImplementor, OJRexIgnoredCallImplementor, OJRexUnaryExpressionImplementor

public interface OJRexImplementor

OJRexImplementor translates a call to a particular operator to OpenJava code.

Implementors are held in a OJRexImplementorTable.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/oj/rex/OJRexImplementor.java#9 $

Author:

John V. Sichi

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.

Method Detail

implement

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

Implements a single RexCall.

Parameters:

translator - provides translation context

call - the call to be translated

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

canImplement

boolean canImplement(RexCall call)

Tests whether it is possible to implement a call.

Parameters:

call - the call for which translation is being considered

Returns:

whether the call can be implemented