net.sf.saffron.rex
Class RexShuttle

java.lang.Object
  |
  +--net.sf.saffron.rex.RexShuttle

Direct Known Subclasses:

OptUtil.VariableUsedVisitor, UnboundVariableCollector

public class RexShuttle

extends Object

Passes over a row-expression, calling a handler method for each node, appropriate to the type of the node.

This is an instance of the Visitor Pattern.

Since:

Nov 26, 2003

Version:

$Id: $

Author:

jhyde

Constructor Summary

RexShuttle()

Method Summary

RexNode	visit(RexCall call)
RexNode	visit(RexCorrelVariable variable)
RexNode	visit(RexInputRef input)
RexNode	visit(RexLiteral literal)
RexNode	visit(RexNode rex)

Methods inherited from class java.lang.Object

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

Constructor Detail

RexShuttle

public RexShuttle()

Method Detail

visit

public RexNode visit(RexNode rex)

visit

public RexNode visit(RexCall call)

visit

public RexNode visit(RexCorrelVariable variable)

visit

public RexNode visit(RexInputRef input)

visit

public RexNode visit(RexLiteral literal)