org.jrdf.query.execute
Interface QueryEngine

All Superinterfaces:

ExpressionVisitor

All Known Implementing Classes:

NaiveQueryEngineImpl

public interface QueryEngine
extends ExpressionVisitor

An expression visitor that produces a relation result.

Version:

$Revision:$

Author:

Andrew Newman

Method Summary

Relation	getResult()
void	initialiseBaseRelation(Relation newRelation)
void	setAllVariables(Map<AttributeName,PositionalNodeType> variables)

Methods inherited from interface org.jrdf.query.expression.ExpressionVisitor

visitConjunction, visitConstraint, visitOptional, visitProjection, visitUnion

Method Detail

getResult

Relation getResult()

initialiseBaseRelation

void initialiseBaseRelation(Relation newRelation)

setAllVariables

void setAllVariables(Map<AttributeName,PositionalNodeType> variables)