Package it.tidalwave.role

Class Composite.VisitorSupport<T,R>

java.lang.Object

it.tidalwave.role.Composite.VisitorSupport<T,R>

All Implemented Interfaces:

Composite.Visitor<T,R>

Enclosing interface:

Composite<TYPE,SPECIALIZED_FINDER extends Finder<? extends TYPE>>

public static class Composite.VisitorSupport<T,R>
extends java.lang.Object
implements Composite.Visitor<T,R>

A support class for Composite.Visitor which provides default empty methods.

Constructor Summary

Constructors

Constructor	Description
VisitorSupport()

Method Summary

Modifier and Type	Method	Description
R	getValue()	Returns the value of this visitor.
void	postVisit(T object)	Visits an object.
void	preVisit(T object)	Visits an object.
void	visit(T object)	Visits an object.

Methods inherited from class java.lang.Object

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

Constructor Detail

VisitorSupport

public VisitorSupport()

Method Detail

preVisit

public void preVisit(@Nonnull
                     T object)

Visits an object. This method is called before visiting children (pre-order).

Specified by:

preVisit in interface Composite.Visitor<T,R>

Parameters:

object - the visited object

visit

public void visit(@Nonnull
                  T object)

Visits an object. This method is actually called just after Composite.Visitor.preVisit(Object), it makes sense to implement it when you don't need to distinguish between pre-order and post-order traversal.

Specified by:

visit in interface Composite.Visitor<T,R>

Parameters:

object - the visited object

postVisit

public void postVisit(@Nonnull
                      T object)

Visits an object. This method is called after visiting children (post-order).

Specified by:

postVisit in interface Composite.Visitor<T,R>

Parameters:

object - the visited object

getValue

@Nonnull
public R getValue()
           throws NotFoundException

Returns the value of this visitor.

Specified by:

getValue in interface Composite.Visitor<T,R>

Returns:

the value

Throws:

NotFoundException - when no value has been found