saffron.rel.convert
Class CollectionConverter

java.lang.Object
  |
  +--saffron.rel.Rel
        |
        +--saffron.rel.SingleRel
              |
              +--saffron.rel.convert.Converter
                    |
                    +--saffron.rel.convert.CollectionConverter

public class CollectionConverter

extends Converter

A CollectionConverter converts a plan from inConvention to CallingConvention.COLLECTION.

Since:

16 December, 2001

Version:

$Id: //open/saffron/src/main/saffron/rel/convert/CollectionConverter.java#7 $

Author:

jhyde

Nested Class Summary

Nested classes inherited from class saffron.rel.Rel

Field Summary

(package private) Variable

var_v

Fields inherited from class saffron.rel.convert.Converter

inConvention

Fields inherited from class saffron.rel.SingleRel

child

Fields inherited from class saffron.rel.Rel

cluster, digest, id, rowType

Constructor Summary

CollectionConverter(Cluster cluster, Rel child)

Method Summary

Object	clone()
CallingConvention	getConvention() Returns a value from CallingConvention.
Object	implement(Implementor implementor, int ordinal) Create a plan for this expression according to a calling convention.
private Object	implementJava(Implementor implementor, int ordinal)
static void	init(Planner planner)

Methods inherited from class saffron.rel.convert.Converter

computeSelfCost

Methods inherited from class saffron.rel.SingleRel

childrenAccept, deriveRowType, explain, getInputs, replaceInput

Methods inherited from class saffron.rel.Rel

computeDigest, getChildExps, getCluster, getCorelVariable, getEnvironment, getId, getInput, getOrCreateCorelVariable, getParentEnv, getQualifier, getQuery, getRelTypeName, getRows, getRowType, getTable, getType, getVariablesStopped, implementExp, implementExps, implementFieldAccess, implementSelf, isAccessTo, isDistinct, onRegister, recomputeDigest, register, registerCorelVariable, setCorelVariable, toString

Methods inherited from class java.lang.Object

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

Field Detail

var_v

Variable var_v

Constructor Detail

CollectionConverter

public CollectionConverter(Cluster cluster,
                           Rel child)

Method Detail

clone

public Object clone()

Specified by:

clone in class Rel

getConvention

public CallingConvention getConvention()

Description copied from class: Rel

Returns a value from CallingConvention.

Overrides:

getConvention in class Rel

init

public static void init(Planner planner)

implement

public Object implement(Implementor implementor,
                        int ordinal)

Description copied from class: Rel

Create a plan for this expression according to a calling convention.

Overrides:

implement in class Converter

Parameters:

implementor - implementor

ordinal - indicates our position in the pre-, in- and postfix walk over the tree; ordinal is -1 when called from the parent, and i when called from the i^th child.

implementJava

private Object implementJava(Implementor implementor,
                             int ordinal)