org.jrdf.query.expression
Class ExpressionVisitorAdapter

java.lang.Object
  org.jrdf.query.expression.ExpressionVisitorAdapter

All Implemented Interfaces:

ExpressionVisitor

Direct Known Subclasses:

NaiveQueryEngineImpl

public class ExpressionVisitorAdapter
extends Object
implements ExpressionVisitor

An adapter for ExpressionVisitor - allows an implementation to avoid having to implement all the methods. Currently, these methods do nothing.

Version:

$Revision:$

Author:

Andrew Newman

Constructor Summary

ExpressionVisitorAdapter()

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> conjunction)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionVisitorAdapter

public ExpressionVisitorAdapter()

Method Detail

visitProjection

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

Specified by:

visitProjection in interface ExpressionVisitor

visitConstraint

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

Specified by:

visitConstraint in interface ExpressionVisitor

visitConjunction

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

Specified by:

visitConjunction in interface ExpressionVisitor

visitUnion

public <V extends ExpressionVisitor> void visitUnion(Union<V> conjunction)

Specified by:

visitUnion in interface ExpressionVisitor

visitOptional

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

Specified by:

visitOptional in interface ExpressionVisitor