org.eigenbase.oj.rex
Class OJRexCastImplementor

java.lang.Object
  org.eigenbase.oj.rex.OJRexCastImplementor

All Implemented Interfaces:

OJRexImplementor

public class OJRexCastImplementor
extends Object
implements OJRexImplementor

OJRexCastImplementor implements OJRexImplementor for the CAST operator.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/oj/rex/OJRexCastImplementor.java#10 $

Author:

John V. Sichi

Constructor Summary

OJRexCastImplementor()

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.

Methods inherited from class java.lang.Object

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

Constructor Detail

OJRexCastImplementor

public OJRexCastImplementor()

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

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