org.jrdf.query.expression
Interface ExpressionVisitor

All Known Subinterfaces:

QueryEngine

All Known Implementing Classes:

ExpressionVisitorAdapter, NaiveQueryEngineImpl

public interface ExpressionVisitor

Visits the various expression objects. Can be used to execute or optimize (transform) expressions.

Version:

$Revision:$

Author:

Andrew Newman

Method Summary

<V extends ExpressionVisitor> void	visitConjunction(Conjunction<V> conjunction)
<V extends ExpressionVisitor> void	visitConstraint(Constraint<V> constraint)
<V extends ExpressionVisitor> void	visitOptional(Optional<V> optional)
<V extends ExpressionVisitor> void	visitProjection(Projection<V> projection)
<V extends ExpressionVisitor> void	visitUnion(Union<V> union)

Method Detail

visitProjection

<V extends ExpressionVisitor> void visitProjection(Projection<V> projection)

visitConstraint

<V extends ExpressionVisitor> void visitConstraint(Constraint<V> constraint)

visitConjunction

<V extends ExpressionVisitor> void visitConjunction(Conjunction<V> conjunction)

visitUnion

<V extends ExpressionVisitor> void visitUnion(Union<V> union)

visitOptional

<V extends ExpressionVisitor> void visitOptional(Optional<V> optional)