org.deri.iris.evaluation.topdown
Interface ITopDownEvaluator

All Known Implementing Classes:

OLDTEvaluator, SLDNFEvaluator

public interface ITopDownEvaluator

Interface for top-down evaluators

Author:

gigi

Method Summary

IRelation	evaluate(IQuery query) Evaluate a query
List<IVariable>	getOutputVariables() Returns a list of output variables, i.e.

Method Detail

evaluate

IRelation evaluate(IQuery query)
                   throws EvaluationException

Evaluate a query

Parameters:

query - a query

Returns:

relation containing all resolved tuples.

Throws:

EvaluationException - thrown on error

getOutputVariables

List<IVariable> getOutputVariables()

Returns a list of output variables, i.e. the variables of the initial query.

Returns:

list of output variables