org.picocontainer.visitors.TraversalCheckingVisitor Maven / Gradle / Ivy
/*****************************************************************************
* Copyright (C) PicoContainer Organization. All rights reserved. *
* ------------------------------------------------------------------------- *
* The software in this package is published under the terms of the BSD *
* style license a copy of which has been included with this distribution in *
* the LICENSE.txt file. *
*****************************************************************************/
package org.picocontainer.visitors;
import org.picocontainer.ComponentAdapter;
import org.picocontainer.Parameter;
import org.picocontainer.PicoContainer;
import org.picocontainer.ComponentFactory;
import org.picocontainer.visitors.AbstractPicoVisitor;
/**
* Concrete implementation of Visitor which simply checks traversals.
* This can be a useful class for other Visitor implementations to extend,
* as it provides a default implementation in case you one is only interested
* in one PicoVisitor type. Example:
*
*
* PicoContainer container = new DefaultPicoContainer();
* PicoContainer child = container.makeChildContainer();
*
* final List allContainers = new ArrayList();
*
* PicoVisitor visitor = new TraversalCheckingVisitor() {
* public boolean visitContainer(PicoContainer pico) {
* super.visitContainer(pico); //Calls checkTraversal for us.
* allContainers.add(pico);
* return true;
* }
* }
*
*
* @author Michael Rimov
*/
public class TraversalCheckingVisitor
extends AbstractPicoVisitor {
/** {@inheritDoc} **/
public boolean visitContainer(PicoContainer pico) {
checkTraversal();
return CONTINUE_TRAVERSAL;
}
/** {@inheritDoc} **/
public void visitComponentAdapter(ComponentAdapter componentAdapter) {
checkTraversal();
}
/** {@inheritDoc} **/
public void visitComponentFactory(ComponentFactory componentFactory) {
checkTraversal();
}
/** {@inheritDoc} **/
public void visitParameter(Parameter parameter) {
checkTraversal();
}
}