org.picocontainer.visitors
Class AbstractPicoVisitor

java.lang.Object
  org.picocontainer.visitors.AbstractPicoVisitor

All Implemented Interfaces:

PicoVisitor

Direct Known Subclasses:

TraversalCheckingVisitor

public abstract class AbstractPicoVisitor
extends Object
implements PicoVisitor

Abstract PicoVisitor implementation. A generic traverse method is implemented, that accepts any object with a method named "accept", that takes a PicoVisitor as argument and and invokes it. Additionally it provides the checkTraversal() method, that throws a AbstractPicoVisitor.PicoVisitorTraversalException, if currently no traversal is running.

Author:

Jörg Schaible

Nested Class Summary

static class

AbstractPicoVisitor.PicoVisitorTraversalException Exception for a PicoVisitor, that is dependent on a defined starting point of the traversal.

Field Summary

Fields inherited from interface org.picocontainer.PicoVisitor

ABORT_TRAVERSAL, CONTINUE_TRAVERSAL

Constructor Summary

AbstractPicoVisitor()

Method Summary

protected void	checkTraversal() Checks the traversal flag, indicating a currently running traversal of the visitor.
Object	traverse(Object node) Entry point for the PicoVisitor traversal.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.picocontainer.PicoVisitor

visitComponentAdapter, visitComponentFactory, visitContainer, visitParameter

Constructor Detail

AbstractPicoVisitor

public AbstractPicoVisitor()

Method Detail

traverse

public Object traverse(Object node)

Description copied from interface: PicoVisitor

Entry point for the PicoVisitor traversal. The given node is the first object, that is asked for acceptance. Only objects of type PicoContainer, ComponentAdapter, or Parameter are valid.

Specified by:

traverse in interface PicoVisitor

Parameters:

node - the start node of the traversal.

Returns:

a visitor-specific value.

checkTraversal

protected void checkTraversal()

Checks the traversal flag, indicating a currently running traversal of the visitor.

Throws:

AbstractPicoVisitor.PicoVisitorTraversalException - if no traversal is active.